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14 results on '"Tricarico P"'

1. Internal rubble properties of asteroid (101955) Bennu

Author

Tricarico, P., Scheeres, D. J., French, A. S., McMahon, J. W., Brack, D. N., Leonard, J. M., Antreasian, P., Chesley, S. R., Farnocchia, D., Takahashi, Y., Mazarico, E. M., Rowlands, D., Highsmith, D., Getzandanner, K., Moreau, M., Johnson, C. L., Philpott, L., Bierhaus, E. B., Walsh, K. J., Barnouin, O. S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Daly, M. G., Seabrook, J. A., Nolan, M. C., Lauretta, D. S., Tricarico, P., Scheeres, D. J., French, A. S., McMahon, J. W., Brack, D. N., Leonard, J. M., Antreasian, P., Chesley, S. R., Farnocchia, D., Takahashi, Y., Mazarico, E. M., Rowlands, D., Highsmith, D., Getzandanner, K., Moreau, M., Johnson, C. L., Philpott, L., Bierhaus, E. B., Walsh, K. J., Barnouin, O. S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Daly, M. G., Seabrook, J. A., Nolan, M. C., and Lauretta, D. S.

Abstract

Exploration of asteroid (101955) Bennu by the OSIRIS-REx mission has provided an in-depth look at this rubble-pile near-Earth asteroid. In particular, the measured gravity field and the detailed shape model of Bennu indicate significant heterogeneities in its interior structure, compatible with a lower density at its center. Here we combine gravity inversion methods with a statistical rubble-pile model to determine the density and size-frequency distribution (SFD) index of the rubble that constitutes Bennu. The best-fitting models indicate that the SFD of the interior is consistent with that observed on the surface, with a cumulative SFD index of approximately $-2.9$. The rubble bulk density is approximately $1.35$ g/cm$^3$, corresponding to a $12$% macro-porosity. We find the largest rubble particle to be approximately $145$ m, whereas the largest void is approximately $10$ m., Comment: 14 pages, 5 figures, accepted to Icarus

Published
2021
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2. Internal rubble properties of asteroid (101955) Bennu

Author

Tricarico, P., Scheeres, D. J., French, A. S., McMahon, J. W., Brack, D. N., Leonard, J. M., Antreasian, P., Chesley, S. R., Farnocchia, D., Takahashi, Y., Mazarico, E. M., Rowlands, D., Highsmith, D., Getzandanner, K., Moreau, M., Johnson, C. L., Philpott, L., Bierhaus, E. B., Walsh, K. J., Barnouin, O. S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Daly, M. G., Seabrook, J. A., Nolan, M. C., Lauretta, D. S., Tricarico, P., Scheeres, D. J., French, A. S., McMahon, J. W., Brack, D. N., Leonard, J. M., Antreasian, P., Chesley, S. R., Farnocchia, D., Takahashi, Y., Mazarico, E. M., Rowlands, D., Highsmith, D., Getzandanner, K., Moreau, M., Johnson, C. L., Philpott, L., Bierhaus, E. B., Walsh, K. J., Barnouin, O. S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Daly, M. G., Seabrook, J. A., Nolan, M. C., and Lauretta, D. S.

Abstract

Exploration of asteroid (101955) Bennu by the OSIRIS-REx mission has provided an in-depth look at this rubble-pile near-Earth asteroid. In particular, the measured gravity field and the detailed shape model of Bennu indicate significant heterogeneities in its interior structure, compatible with a lower density at its center. Here we combine gravity inversion methods with a statistical rubble-pile model to determine the density and size-frequency distribution (SFD) index of the rubble that constitutes Bennu. The best-fitting models indicate that the SFD of the interior is consistent with that observed on the surface, with a cumulative SFD index of approximately $-2.9$. The rubble bulk density is approximately $1.35$ g/cm$^3$, corresponding to a $12$% macro-porosity. We find the largest rubble particle to be approximately $145$ m, whereas the largest void is approximately $10$ m., Comment: 14 pages, 5 figures, accepted to Icarus

Published
2021
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3. Comorbid acne inversa and Dowling–Degos disease due to a single NCSTN mutation: is there enough evidence? Reply from the authors

Author

Garcovich, Simone, Tricarico, P. M., Meddour, C. N., Giovanardi, G., Peris, Ketty, Crovella, S., Boniotto, M., Garcovich S. (ORCID:0000-0001-8967-6688), Peris K. (ORCID:0000-0002-5237-0463), Garcovich, Simone, Tricarico, P. M., Meddour, C. N., Giovanardi, G., Peris, Ketty, Crovella, S., Boniotto, M., Garcovich S. (ORCID:0000-0001-8967-6688), and Peris K. (ORCID:0000-0002-5237-0463)

Abstract

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Published
2021

4. Altered keratinization and vitamin D metabolism may be key pathogenetic pathways in syndromic hidradenitis suppurativa: a novel whole exome sequencing approach

Author

Brandao, L., Moura, R., Tricarico, P. M., Gratton, R., Genovese, G., Moltrasio, C., Garcovich, Simone, Boniotto, M., Crovella, S., Marzano, A. V., Garcovich S. (ORCID:0000-0001-8967-6688), Brandao, L., Moura, R., Tricarico, P. M., Gratton, R., Genovese, G., Moltrasio, C., Garcovich, Simone, Boniotto, M., Crovella, S., Marzano, A. V., and Garcovich S. (ORCID:0000-0001-8967-6688)

Abstract

Background: Diagnosis of pyoderma gangrenosum, acne and hidradenitis suppurativa (PASH) and pyogenic arthritis, pyoderma gangrenosum, acne, and hidradenitis suppurativa (PAPASH) patients, in spite of recently identified genetic variations, is just clinical, since most patients do not share the same mutations, and the mutations themselves are not informative of the biological pathways commonly disrupted in these patients. Objective: To reveal genetic changes more closely related to PASH and PAPASH etiopathogenesis, identifying novel common pathways involved in these diseases. Methods: Cohort study on PASH (n = 4) and PAPASH (n = 1) patients conducted using whole exome sequencing (WES) approach and a novel bioinformatic pipeline aimed at discovering potentially candidate genes selected from density mutations and involved in pathways relevant to the disease. Results: WES results showed that patients presented 90 genes carrying mutations with deleterious and/or damage impact: 12 genes were in common among the 5 patients and bared 237 ns ExonVar (54 and 183 in homozygosis and heterozygosis, respectively). In the pathway enrichment analysis, only 10 genes were included, allowing us to retrieve 4 pathways shared by all patients: (1) Vitamin D metabolism, (2) keratinization, (3) formation of the cornified envelope and (4) steroid metabolism. Interestingly, all patients had vitamin D levels lower than normal, with a mean value of 10 ng/mL. Conclusion: Our findings, through a novel strategy for analysing the genetic background of syndromic HS patients, suggested that vitamin D metabolism dysfunctions seem to be crucial in PASH and PAPASH pathogenesis. Based on low vitamin D serum levels, its supplementation is envisaged.

Published
2020

5. Novel nicastrin mutation in hidradenitis suppurativa-Dowling Degos disease clinical phenotype: more than just clinical overlap?

Author

Garcovich, Simone, Tricarico, P M, Meddour, C N, Giovanardi, Giulia, Peris, Ketty, Crovella, S, Boniotto, M, Garcovich, S (ORCID:0000-0001-8967-6688), Giovanardi, G, Peris, K (ORCID:0000-0002-5237-0463), Garcovich, Simone, Tricarico, P M, Meddour, C N, Giovanardi, Giulia, Peris, Ketty, Crovella, S, Boniotto, M, Garcovich, S (ORCID:0000-0001-8967-6688), Giovanardi, G, and Peris, K (ORCID:0000-0002-5237-0463)

Abstract

In familial hidradenitis suppurativa (HS), mutations in the genes encoding three subunits of the ‐secretase complex, PSEN1, PSENEN and NCSTN, have pointed to an impaired NOTCH signalling as a pathogenic disease mechanism.1 Dowling Degos Disease (DDD; MIM 179850, 615327, and 615696)―a rare reticulated pigmentary disorder― has also been associated with a deficient NOTCH signalling and patients with mutations in PSENEN suffering from both disorders seem to confirm a potential link between two apparently different conditions.

Published
2020

6. The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations

Author

Hergenrother, CW, Maleszewski, CK, Nolan, MC, Li, J-Y, d'Aubigny, CYD, Shelly, FC, Howell, ES, Kareta, TR, Izawa, MRM, Barucci, MA, Bierhaus, EB, Campins, H, Chesley, SR, Clark, BE, Christensen, EJ, DellaGiustina, DN, Fornasier, S, Golish, DR, Hartzell, CM, Rizk, B, Scheeres, DJ, Smith, PH, Zou, X-D, Lauretta, DS, Highsmith, DE, Small, J, Vokrouhlicky, D, Bowles, NE, Brown, E, Hanna, KLD, Warren, T, Brunet, C, Chicoine, RA, Desjardins, S, Gaudreau, D, Haltigin, T, Millington-Veloza, S, Rubi, A, Aponte, J, Gorius, N, Lunsford, A, Allen, B, Grindlay, J, Guevel, D, Hoak, D, Hong, J, Schrader, DL, Bayron, J, Golubov, O, Sanchez, P, Stromberg, J, Hirabayashi, M, Oliver, S, Rascon, M, Harch, A, Joseph, J, Squyres, S, Richardson, D, Emery, JP, McGraw, L, Ghent, R, Binzel, RP, Al Asad, MM, Johnson, CL, Philpott, L, Susorney, HCM, Cloutis, EA, Hanna, RD, Connolly, HC, Ciceri, F, Hildebrand, AR, Ibrahim, E-M, Breitenfeld, L, Glotch, T, Rogers, AD, Ferrone, S, Thomas, CA, Fernandez, Y, Chang, W, Cheuvront, A, Trang, D, Tachibana, S, Yurimoto, H, Brucato, JR, Poggiali, G, Pajola, M, Dotto, E, Epifani, EM, Crombie, MK, Lantz, C, de Leon, J, Licandro, J, Rizos Garcia, JL, Clemett, S, Thomas-Keprta, K, Van Wal, S, Yoshikawa, M, Bellerose, J, Bhaskaran, S, Boyles, C, Elder, CM, Farnocchia, D, Harbison, A, Kennedy, B, Knight, A, Martinez-Vlasoff, N, Mastrodemos, N, McElrath, T, Owen, W, Park, R, Rush, B, Swanson, L, Takahashi, Y, Velez, D, Yetter, K, Thayer, C, Adam, C, Antreasian, P, Bauman, J, Bryan, C, Carcich, B, Corvin, M, Geeraert, J, Hoffman, J, Leonard, JM, Lessac-Chenen, E, Levine, A, McAdams, J, McCarthy, L, Nelson, D, Page, B, Pelgrift, J, Sahr, E, Stakkestad, K, Stanbridge, D, Wibben, D, Williams, B, Williams, K, Wolff, P, Hayne, P, Kubitschek, D, Deshapriya, JDP, Fulchignoni, M, Hasselmann, P, Merlin, F, Praet, A, Billett, O, Boggs, A, Buck, B, Carlson-Kelly, S, Cerna, J, Chaffin, K, Church, E, Coltrin, M, Daly, J, Deguzman, A, Dubisher, R, Eckart, D, Ellis, D, Falkenstern, P, Fisher, A, Fisher, ME, Fleming, P, Fortney, K, Francis, S, Freund, S, Gonzales, S, Haas, P, Hasten, A, Hauf, D, Hilbert, A, Howell, D, Jaen, F, Jayakody, N, Jenkins, M, Johnson, K, Lefevre, M, Ma, H, Mario, C, Martin, K, May, C, McGee, M, Miller, B, Miller, C, Miller, G, Mirfakhrai, A, Muhle, E, Norman, C, Olds, R, Parish, C, Ryle, M, Schmitzer, M, Sherman, P, Skeen, M, Susak, M, Sutter, B, Tran, Q, Welch, C, Witherspoon, R, Wood, J, Zareski, J, Arvizu-Jakubicki, M, Asphaug, E, Audi, E, Ballouz, R-L, Bandrowski, R, Becker, KJ, Becker, TL, Bendall, S, Bennett, CA, Bloomenthal, H, Blum, D, Boynton, W, Brodbeck, J, Burke, KN, Chojnacki, M, Colpo, A, Contreras, J, Cutts, J, Dean, D, Diallo, B, Drinnon, D, Drozd, K, Enos, HL, Enos, R, Fellows, C, Ferro, T, Fisher, MR, Fitzgibbon, G, Fitzgibbon, M, Forelli, J, Forrester, T, Galinsky, I, Garcia, R, Gardner, A, Habib, N, Hamara, D, Hammond, D, Hanley, K, Harshman, K, Herzog, K, Hill, D, Hoekenga, C, Hooven, S, Huettner, E, Janakus, A, Jones, J, Kidd, J, Kingsbury, K, Balram-Knutson, SS, Koelbel, L, Kreiner, J, Lambert, D, Lewin, C, Lovelace, B, Loveridge, M, Lujan, M, Malhotra, R, Marchese, K, McDonough, E, Mogk, N, Morrison, V, Morton, E, Munoz, R, Nelson, J, Padilla, J, Pennington, R, Polit, A, Ramos, N, Reddy, V, Riehl, M, Roper, HL, Salazar, S, Schwartz, SR, Selznick, S, Shultz, N, Stewart, S, Sutton, S, Swindle, T, Tang, YH, Westermann, M, Wolner, CW, Worden, D, Zega, T, Zeszut, Z, Bjurstrom, A, Bloomquist, L, Dickinson, C, Keates, E, Liang, J, Nifo, V, Taylor, A, Teti, F, Caplinger, M, Bowles, H, Carter, S, Dickenshied, S, Doerres, D, Fisher, T, Hagee, W, Hill, J, Miner, M, Noss, D, Piacentine, N, Smith, M, Toland, A, Wren, P, Bernacki, M, Munoz, DP, Watanabe, S, Sandford, SA, Aqueche, A, Ashman, B, Barker, M, Bartels, A, Berry, K, Bos, B, Burns, R, Calloway, A, Carpenter, R, Castro, N, Cosentino, R, Donaldson, J, Dworkin, JP, Cook, JE, Emr, C, Everett, D, Fennell, D, Fleshman, K, Folta, D, Gallagher, D, Garvin, J, Getzandanner, K, Glavin, D, Hull, S, Hyde, K, Ido, H, Ingegneri, A, Jones, N, Kaotira, P, Lim, LF, Liounis, A, Lorentson, C, Lorenz, D, Lyzhoft, J, Mazarico, EM, Mink, R, Moore, W, Moreau, M, Mullen, S, Nagy, J, Neumann, G, Nuth, J, Poland, D, Reuter, DC, Rhoads, L, Rieger, S, Rowlands, D, Sallitt, D, Scroggins, A, Shaw, G, Simon, AA, Swenson, J, Vasudeva, P, Wasser, M, Zellar, R, Grossman, J, Johnston, G, Morris, M, Wendel, J, Burton, A, Keller, LP, McNamara, L, Messenger, S, Nakamura-Messenger, K, Nguyen, A, Righter, K, Queen, E, Bellamy, K, Dill, K, Gardner, S, Giuntini, M, Key, B, Kissell, J, Patterson, D, Vaughan, D, Wright, B, Gaskell, RW, Le Corre, L, Molaro, JL, Palmer, EE, Siegler, MA, Tricarico, P, Weirich, JR, Ireland, T, Tait, K, Bland, P, Anwar, S, Bojorquez-Murphy, N, Christensen, PR, Haberle, CW, Mehall, G, Rios, K, Franchi, I, Rozitis, B, Beddingfield, CB, Marshall, J, Brack, DN, French, AS, McMahon, JW, Jawin, ER, McCoy, TJ, Russell, S, Killgore, M, Bottke, WF, Hamilton, VE, Kaplan, HH, Walsh, KJ, Bandfield, JL, Clark, BC, Chodas, M, Lambert, M, Masterson, RA, Daly, MG, Freemantle, J, Seabrook, JA, Barnouin, OS, Craft, K, Daly, RT, Ernst, C, Espiritu, RC, Holdridge, M, Jones, M, Nair, AH, Nguyen, L, Peachey, J, Perry, ME, Plescia, J, Roberts, JH, Steele, R, Turner, R, Backer, J, Edmundson, K, Mapel, J, Milazzo, M, Sides, S, Manzoni, C, May, B, Delbo, M, Libourel, G, Michel, P, Ryan, A, Thuillet, F, Marty, B, Hergenrother, CW, Maleszewski, CK, Nolan, MC, Li, J-Y, d'Aubigny, CYD, Shelly, FC, Howell, ES, Kareta, TR, Izawa, MRM, Barucci, MA, Bierhaus, EB, Campins, H, Chesley, SR, Clark, BE, Christensen, EJ, DellaGiustina, DN, Fornasier, S, Golish, DR, Hartzell, CM, Rizk, B, Scheeres, DJ, Smith, PH, Zou, X-D, Lauretta, DS, Highsmith, DE, Small, J, Vokrouhlicky, D, Bowles, NE, Brown, E, Hanna, KLD, Warren, T, Brunet, C, Chicoine, RA, Desjardins, S, Gaudreau, D, Haltigin, T, Millington-Veloza, S, Rubi, A, Aponte, J, Gorius, N, Lunsford, A, Allen, B, Grindlay, J, Guevel, D, Hoak, D, Hong, J, Schrader, DL, Bayron, J, Golubov, O, Sanchez, P, Stromberg, J, Hirabayashi, M, Oliver, S, Rascon, M, Harch, A, Joseph, J, Squyres, S, Richardson, D, Emery, JP, McGraw, L, Ghent, R, Binzel, RP, Al Asad, MM, Johnson, CL, Philpott, L, Susorney, HCM, Cloutis, EA, Hanna, RD, Connolly, HC, Ciceri, F, Hildebrand, AR, Ibrahim, E-M, Breitenfeld, L, Glotch, T, Rogers, AD, Ferrone, S, Thomas, CA, Fernandez, Y, Chang, W, Cheuvront, A, Trang, D, Tachibana, S, Yurimoto, H, Brucato, JR, Poggiali, G, Pajola, M, Dotto, E, Epifani, EM, Crombie, MK, Lantz, C, de Leon, J, Licandro, J, Rizos Garcia, JL, Clemett, S, Thomas-Keprta, K, Van Wal, S, Yoshikawa, M, Bellerose, J, Bhaskaran, S, Boyles, C, Elder, CM, Farnocchia, D, Harbison, A, Kennedy, B, Knight, A, Martinez-Vlasoff, N, Mastrodemos, N, McElrath, T, Owen, W, Park, R, Rush, B, Swanson, L, Takahashi, Y, Velez, D, Yetter, K, Thayer, C, Adam, C, Antreasian, P, Bauman, J, Bryan, C, Carcich, B, Corvin, M, Geeraert, J, Hoffman, J, Leonard, JM, Lessac-Chenen, E, Levine, A, McAdams, J, McCarthy, L, Nelson, D, Page, B, Pelgrift, J, Sahr, E, Stakkestad, K, Stanbridge, D, Wibben, D, Williams, B, Williams, K, Wolff, P, Hayne, P, Kubitschek, D, Deshapriya, JDP, Fulchignoni, M, Hasselmann, P, Merlin, F, Praet, A, Billett, O, Boggs, A, Buck, B, Carlson-Kelly, S, Cerna, J, Chaffin, K, Church, E, Coltrin, M, Daly, J, Deguzman, A, Dubisher, R, Eckart, D, Ellis, D, Falkenstern, P, Fisher, A, Fisher, ME, Fleming, P, Fortney, K, Francis, S, Freund, S, Gonzales, S, Haas, P, Hasten, A, Hauf, D, Hilbert, A, Howell, D, Jaen, F, Jayakody, N, Jenkins, M, Johnson, K, Lefevre, M, Ma, H, Mario, C, Martin, K, May, C, McGee, M, Miller, B, Miller, C, Miller, G, Mirfakhrai, A, Muhle, E, Norman, C, Olds, R, Parish, C, Ryle, M, Schmitzer, M, Sherman, P, Skeen, M, Susak, M, Sutter, B, Tran, Q, Welch, C, Witherspoon, R, Wood, J, Zareski, J, Arvizu-Jakubicki, M, Asphaug, E, Audi, E, Ballouz, R-L, Bandrowski, R, Becker, KJ, Becker, TL, Bendall, S, Bennett, CA, Bloomenthal, H, Blum, D, Boynton, W, Brodbeck, J, Burke, KN, Chojnacki, M, Colpo, A, Contreras, J, Cutts, J, Dean, D, Diallo, B, Drinnon, D, Drozd, K, Enos, HL, Enos, R, Fellows, C, Ferro, T, Fisher, MR, Fitzgibbon, G, Fitzgibbon, M, Forelli, J, Forrester, T, Galinsky, I, Garcia, R, Gardner, A, Habib, N, Hamara, D, Hammond, D, Hanley, K, Harshman, K, Herzog, K, Hill, D, Hoekenga, C, Hooven, S, Huettner, E, Janakus, A, Jones, J, Kidd, J, Kingsbury, K, Balram-Knutson, SS, Koelbel, L, Kreiner, J, Lambert, D, Lewin, C, Lovelace, B, Loveridge, M, Lujan, M, Malhotra, R, Marchese, K, McDonough, E, Mogk, N, Morrison, V, Morton, E, Munoz, R, Nelson, J, Padilla, J, Pennington, R, Polit, A, Ramos, N, Reddy, V, Riehl, M, Roper, HL, Salazar, S, Schwartz, SR, Selznick, S, Shultz, N, Stewart, S, Sutton, S, Swindle, T, Tang, YH, Westermann, M, Wolner, CW, Worden, D, Zega, T, Zeszut, Z, Bjurstrom, A, Bloomquist, L, Dickinson, C, Keates, E, Liang, J, Nifo, V, Taylor, A, Teti, F, Caplinger, M, Bowles, H, Carter, S, Dickenshied, S, Doerres, D, Fisher, T, Hagee, W, Hill, J, Miner, M, Noss, D, Piacentine, N, Smith, M, Toland, A, Wren, P, Bernacki, M, Munoz, DP, Watanabe, S, Sandford, SA, Aqueche, A, Ashman, B, Barker, M, Bartels, A, Berry, K, Bos, B, Burns, R, Calloway, A, Carpenter, R, Castro, N, Cosentino, R, Donaldson, J, Dworkin, JP, Cook, JE, Emr, C, Everett, D, Fennell, D, Fleshman, K, Folta, D, Gallagher, D, Garvin, J, Getzandanner, K, Glavin, D, Hull, S, Hyde, K, Ido, H, Ingegneri, A, Jones, N, Kaotira, P, Lim, LF, Liounis, A, Lorentson, C, Lorenz, D, Lyzhoft, J, Mazarico, EM, Mink, R, Moore, W, Moreau, M, Mullen, S, Nagy, J, Neumann, G, Nuth, J, Poland, D, Reuter, DC, Rhoads, L, Rieger, S, Rowlands, D, Sallitt, D, Scroggins, A, Shaw, G, Simon, AA, Swenson, J, Vasudeva, P, Wasser, M, Zellar, R, Grossman, J, Johnston, G, Morris, M, Wendel, J, Burton, A, Keller, LP, McNamara, L, Messenger, S, Nakamura-Messenger, K, Nguyen, A, Righter, K, Queen, E, Bellamy, K, Dill, K, Gardner, S, Giuntini, M, Key, B, Kissell, J, Patterson, D, Vaughan, D, Wright, B, Gaskell, RW, Le Corre, L, Molaro, JL, Palmer, EE, Siegler, MA, Tricarico, P, Weirich, JR, Ireland, T, Tait, K, Bland, P, Anwar, S, Bojorquez-Murphy, N, Christensen, PR, Haberle, CW, Mehall, G, Rios, K, Franchi, I, Rozitis, B, Beddingfield, CB, Marshall, J, Brack, DN, French, AS, McMahon, JW, Jawin, ER, McCoy, TJ, Russell, S, Killgore, M, Bottke, WF, Hamilton, VE, Kaplan, HH, Walsh, KJ, Bandfield, JL, Clark, BC, Chodas, M, Lambert, M, Masterson, RA, Daly, MG, Freemantle, J, Seabrook, JA, Barnouin, OS, Craft, K, Daly, RT, Ernst, C, Espiritu, RC, Holdridge, M, Jones, M, Nair, AH, Nguyen, L, Peachey, J, Perry, ME, Plescia, J, Roberts, JH, Steele, R, Turner, R, Backer, J, Edmundson, K, Mapel, J, Milazzo, M, Sides, S, Manzoni, C, May, B, Delbo, M, Libourel, G, Michel, P, Ryan, A, Thuillet, F, and Marty, B

Abstract

During its approach to asteroid (101955) Bennu, NASA's Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft surveyed Bennu's immediate environment, photometric properties, and rotation state. Discovery of a dusty environment, a natural satellite, or unexpected asteroid characteristics would have had consequences for the mission's safety and observation strategy. Here we show that spacecraft observations during this period were highly sensitive to satellites (sub-meter scale) but reveal none, although later navigational images indicate that further investigation is needed. We constrain average dust production in September 2018 from Bennu's surface to an upper limit of 150 g s-1 averaged over 34 min. Bennu's disk-integrated photometric phase function validates measurements from the pre-encounter astronomical campaign. We demonstrate that Bennu's rotation rate is accelerating continuously at 3.63 ± 0.52 × 10-6 degrees day-2, likely due to the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, with evolutionary implications.

Published
2019

7. Eclipse Prediction and Orbit Improvement for Asteroids: Theory and Application to Near Earth Asteroids

Author

Tricarico, P., Hearn, N. C., Lake, G., Worthey, G., Tricarico, P., Hearn, N. C., Lake, G., and Worthey, G.

Abstract

Asteroids can be eclipsed by other bodies in the Solar System, but no direct observation of an asteroid eclipse has been reported to date. We describe a statistical method to predict an eclipse for an asteroid based on the analysis of the orbital elements covariance matrix. By propagating a set of Virtual Asteroids to an epoch correspondent to a close approach with a Solar System planet or natural satellite, it is possible to estimate the probability of a partial or total eclipse. The direct observation of an eclipse can provide data useful to improve the asteroid orbit, especially for dim asteroids typically observed only for a few days. We propose two different methods: the first, based on the inclusion of the apparent magnitude residuals into the orbit's least squares minimization process, capable of improving the asteroid's nominal orbit and the related covariance matrix; the second, based on weighting different Virtual Asteroids in relation to their apparent magnitude during the eclipse, useful for recovery purposes. As an application, we have numerically investigated the possibility of a Near Earth Asteroid eclipsed by the Moon or the Earth in the 1990-2050 period. A total of 74 distinct eclipses have been found, involving 59 asteroids. In particular, the asteroid (99942) Apophis has a probability of about 74% to enter the Moon's penumbra cone and a probability of about 6% to enter the umbra cone on April 14, 2029, less than six hours after a very close approach to Earth., Comment: 14 pages, 2 tables, 8 figures, submitted to ICARUS

Published
2005

8. Eclipse Prediction and Orbit Improvement for Asteroids: Theory and Application to Near Earth Asteroids

Author

Tricarico, P., Hearn, N. C., Lake, G., Worthey, G., Tricarico, P., Hearn, N. C., Lake, G., and Worthey, G.

Abstract

Asteroids can be eclipsed by other bodies in the Solar System, but no direct observation of an asteroid eclipse has been reported to date. We describe a statistical method to predict an eclipse for an asteroid based on the analysis of the orbital elements covariance matrix. By propagating a set of Virtual Asteroids to an epoch correspondent to a close approach with a Solar System planet or natural satellite, it is possible to estimate the probability of a partial or total eclipse. The direct observation of an eclipse can provide data useful to improve the asteroid orbit, especially for dim asteroids typically observed only for a few days. We propose two different methods: the first, based on the inclusion of the apparent magnitude residuals into the orbit's least squares minimization process, capable of improving the asteroid's nominal orbit and the related covariance matrix; the second, based on weighting different Virtual Asteroids in relation to their apparent magnitude during the eclipse, useful for recovery purposes. As an application, we have numerically investigated the possibility of a Near Earth Asteroid eclipsed by the Moon or the Earth in the 1990-2050 period. A total of 74 distinct eclipses have been found, involving 59 asteroids. In particular, the asteroid (99942) Apophis has a probability of about 74% to enter the Moon's penumbra cone and a probability of about 6% to enter the umbra cone on April 14, 2029, less than six hours after a very close approach to Earth., Comment: 14 pages, 2 tables, 8 figures, submitted to ICARUS

Published
2005

9. Heterogeneous mass distribution of the rubble-pile asteroid (101955) Bennu

Author

Scheeres, D. J., French, A. S., Tricarico, P., Chesley, S. R., Takahashi, Y., Farnocchia, D., McMahon, J. W., Brack, D. N., Davis, A. B., Ballouz, R.-L., Jawin, E. R., Rozitis, B., Emery, J. P., Ryan, A. J., Park, R. S., Rush, B. P., Mastrodemos, N., Kennedy, B. M., Bellerose, J., Lubey, D. P., Velez, D., Vaughan, A. T., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Mazarico, E., Getzandanner, K., Rowlands, D., Moreau, M. C., Small, J., Highsmith, D. E., Goossens, S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Al Asad, M. M., Philpott, L. C., Johnson, C. L., Hartzell, C. M., Hamilton, V. E., Michel, P., Walsh, K. J., Nolan, M. C., Lauretta, D. S., Scheeres, D. J., French, A. S., Tricarico, P., Chesley, S. R., Takahashi, Y., Farnocchia, D., McMahon, J. W., Brack, D. N., Davis, A. B., Ballouz, R.-L., Jawin, E. R., Rozitis, B., Emery, J. P., Ryan, A. J., Park, R. S., Rush, B. P., Mastrodemos, N., Kennedy, B. M., Bellerose, J., Lubey, D. P., Velez, D., Vaughan, A. T., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Mazarico, E., Getzandanner, K., Rowlands, D., Moreau, M. C., Small, J., Highsmith, D. E., Goossens, S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Al Asad, M. M., Philpott, L. C., Johnson, C. L., Hartzell, C. M., Hamilton, V. E., Michel, P., Walsh, K. J., Nolan, M. C., and Lauretta, D. S.

Abstract

The gravity field of a small body provides insight into its internal mass distribution. We used two approaches to measure the gravity field of the rubble-pile asteroid (101955) Bennu: (i) tracking and modeling the spacecraft in orbit about the asteroid and (ii) tracking and modeling pebble-sized particles naturally ejected from Bennu’s surface into sustained orbits. These approaches yield statistically consistent results up to degree and order 3, with the particle-based field being statistically significant up to degree and order 9. Comparisons with a constant-density shape model show that Bennu has a heterogeneous mass distribution. These deviations can be modeled with lower densities at Bennu’s equatorial bulge and center. The lower-density equator is consistent with recent migration and redistribution of material. The lower-density center is consistent with a past period of rapid rotation, either from a previous Yarkovsky-O’Keefe-Radzievskii-Paddack cycle or arising during Bennu’s accretion following the disruption of its parent body.

10. Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

Author

Lauretta, D. S., Hergenrother, C. W., Chesley, S. R., Leonard, J. M., Pelgrift, J. Y., Adam, C. D., Al Asad, M., Antreasian, P. G., Ballouz, R.-L., Becker, K. J., Bennett, C. A., Bos, B. J., Bottke, W. F., Brozovic, M., Campins, H., Connolly Jr., H. C., Daly, M. G., Davis, A. B., de Leon, J., DellaGiustina, D. N., Drouet d'Aubigny, C. Y., Dworkin, J. P., Emery, J. P., Farnocchia, D., Glavin, D. P., Golish, D. R., Hartzell, C. M., Jacobson, R. A., Jawin, E. R., Jenniskens, P., Kidd Jr., J. N., Lessac-Chenen, E. J., Li, J.-Y., Libourel, G., Licandro, J., Liounis, A. J., Maleszewski, C. K., Manzoni, C., May, B., McCarthy, L. K., McMahon, J., Michel, P., Molaro, J. L., Moreau, M. C., Nelson, D. S., Owen Jr., W. M., Rizk, B., Roper, H. L., Rozitis, B., Sahr, E. M., Scheeres, D. J., Seabrook, J. A., Selznick, S. H., Takahashi, Y., Thuillet, F., Tricarico, P., Vokrouhlicky, D., Wolner, C. W. V., Lauretta, D. S., Hergenrother, C. W., Chesley, S. R., Leonard, J. M., Pelgrift, J. Y., Adam, C. D., Al Asad, M., Antreasian, P. G., Ballouz, R.-L., Becker, K. J., Bennett, C. A., Bos, B. J., Bottke, W. F., Brozovic, M., Campins, H., Connolly Jr., H. C., Daly, M. G., Davis, A. B., de Leon, J., DellaGiustina, D. N., Drouet d'Aubigny, C. Y., Dworkin, J. P., Emery, J. P., Farnocchia, D., Glavin, D. P., Golish, D. R., Hartzell, C. M., Jacobson, R. A., Jawin, E. R., Jenniskens, P., Kidd Jr., J. N., Lessac-Chenen, E. J., Li, J.-Y., Libourel, G., Licandro, J., Liounis, A. J., Maleszewski, C. K., Manzoni, C., May, B., McCarthy, L. K., McMahon, J., Michel, P., Molaro, J. L., Moreau, M. C., Nelson, D. S., Owen Jr., W. M., Rizk, B., Roper, H. L., Rozitis, B., Sahr, E. M., Scheeres, D. J., Seabrook, J. A., Selznick, S. H., Takahashi, Y., Thuillet, F., Tricarico, P., Vokrouhlicky, D., and Wolner, C. W. V.

Abstract

Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) spacecraft. For the three largest events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteroid impacts, thermal stress fracturing, and secondary impacts.

11. The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements

Author

Scheeres, D. J., McMahon, J. W., French, A. S., Brack, D. N., Chesley, S. R., Farnocchia, D., Takahashi, Y., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Getzandanner, K., Rowlands, D., Mazarico, E. M., Small, J., Highsmith, D. E., Moreau, M., Emery, J. P., Rozitis, B., Hirabayashi, M., Sánchez, P., Van wal, S., Tricarico, P., Ballouz, R.-L., Johnson, C. L., Al Asad, M. M., Susorney, H. C. M., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Gaskell, R. W., Palmer, E. E., Weirich, J. R., Walsh, K. J., Jawin, E. R., Bierhaus, E. B., Michel, P., Bottke, W. F., Nolan, M. C., Connolly, H. C., Lauretta, D. S., Scheeres, D. J., McMahon, J. W., French, A. S., Brack, D. N., Chesley, S. R., Farnocchia, D., Takahashi, Y., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Getzandanner, K., Rowlands, D., Mazarico, E. M., Small, J., Highsmith, D. E., Moreau, M., Emery, J. P., Rozitis, B., Hirabayashi, M., Sánchez, P., Van wal, S., Tricarico, P., Ballouz, R.-L., Johnson, C. L., Al Asad, M. M., Susorney, H. C. M., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Gaskell, R. W., Palmer, E. E., Weirich, J. R., Walsh, K. J., Jawin, E. R., Bierhaus, E. B., Michel, P., Bottke, W. F., Nolan, M. C., Connolly, H. C., and Lauretta, D. S.

Abstract

The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Yet a detailed geophysical analysis of this morphology for a fast-spinning asteroid has not been possible prior to the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission. Combining the measured Bennu mass and shape obtained during the Preliminary Survey phase of the OSIRIS-REx mission, we find a notable transition in Bennu’s surface slopes within its rotational Roche lobe, defined as the region where material is energetically trapped to the surface. As the intersection of the rotational Roche lobe with Bennu’s surface has been most recently migrating towards its equator (given Bennu’s increasing spin rate), we infer that Bennu’s surface slopes have been changing across its surface within the last million years. We also find evidence for substantial density heterogeneity within this body, suggesting that its interior is a mixture of voids and boulders. The presence of such heterogeneity and Bennu’s top shape are consistent with spin-induced failure at some point in its past, although the manner of its failure cannot yet be determined. Future measurements by the OSIRIS-REx spacecraft will provide insight into and may resolve questions regarding the formation and evolution of Bennu’s top-shape morphology and its link to the formation of binary asteroids.

12. The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements

Author

Scheeres, D. J., McMahon, J. W., French, A. S., Brack, D. N., Chesley, S. R., Farnocchia, D., Takahashi, Y., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Getzandanner, K., Rowlands, D., Mazarico, E. M., Small, J., Highsmith, D. E., Moreau, M., Emery, J. P., Rozitis, B., Hirabayashi, M., Sánchez, P., Van wal, S., Tricarico, P., Ballouz, R.-L., Johnson, C. L., Al Asad, M. M., Susorney, H. C. M., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Gaskell, R. W., Palmer, E. E., Weirich, J. R., Walsh, K. J., Jawin, E. R., Bierhaus, E. B., Michel, P., Bottke, W. F., Nolan, M. C., Connolly, H. C., Lauretta, D. S., Scheeres, D. J., McMahon, J. W., French, A. S., Brack, D. N., Chesley, S. R., Farnocchia, D., Takahashi, Y., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Getzandanner, K., Rowlands, D., Mazarico, E. M., Small, J., Highsmith, D. E., Moreau, M., Emery, J. P., Rozitis, B., Hirabayashi, M., Sánchez, P., Van wal, S., Tricarico, P., Ballouz, R.-L., Johnson, C. L., Al Asad, M. M., Susorney, H. C. M., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Gaskell, R. W., Palmer, E. E., Weirich, J. R., Walsh, K. J., Jawin, E. R., Bierhaus, E. B., Michel, P., Bottke, W. F., Nolan, M. C., Connolly, H. C., and Lauretta, D. S.

Abstract

The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Yet a detailed geophysical analysis of this morphology for a fast-spinning asteroid has not been possible prior to the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission. Combining the measured Bennu mass and shape obtained during the Preliminary Survey phase of the OSIRIS-REx mission, we find a notable transition in Bennu’s surface slopes within its rotational Roche lobe, defined as the region where material is energetically trapped to the surface. As the intersection of the rotational Roche lobe with Bennu’s surface has been most recently migrating towards its equator (given Bennu’s increasing spin rate), we infer that Bennu’s surface slopes have been changing across its surface within the last million years. We also find evidence for substantial density heterogeneity within this body, suggesting that its interior is a mixture of voids and boulders. The presence of such heterogeneity and Bennu’s top shape are consistent with spin-induced failure at some point in its past, although the manner of its failure cannot yet be determined. Future measurements by the OSIRIS-REx spacecraft will provide insight into and may resolve questions regarding the formation and evolution of Bennu’s top-shape morphology and its link to the formation of binary asteroids.

13. Heterogeneous mass distribution of the rubble-pile asteroid (101955) Bennu

Author

Scheeres, D. J., French, A. S., Tricarico, P., Chesley, S. R., Takahashi, Y., Farnocchia, D., McMahon, J. W., Brack, D. N., Davis, A. B., Ballouz, R.-L., Jawin, E. R., Rozitis, B., Emery, J. P., Ryan, A. J., Park, R. S., Rush, B. P., Mastrodemos, N., Kennedy, B. M., Bellerose, J., Lubey, D. P., Velez, D., Vaughan, A. T., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Mazarico, E., Getzandanner, K., Rowlands, D., Moreau, M. C., Small, J., Highsmith, D. E., Goossens, S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Al Asad, M. M., Philpott, L. C., Johnson, C. L., Hartzell, C. M., Hamilton, V. E., Michel, P., Walsh, K. J., Nolan, M. C., Lauretta, D. S., Scheeres, D. J., French, A. S., Tricarico, P., Chesley, S. R., Takahashi, Y., Farnocchia, D., McMahon, J. W., Brack, D. N., Davis, A. B., Ballouz, R.-L., Jawin, E. R., Rozitis, B., Emery, J. P., Ryan, A. J., Park, R. S., Rush, B. P., Mastrodemos, N., Kennedy, B. M., Bellerose, J., Lubey, D. P., Velez, D., Vaughan, A. T., Leonard, J. M., Geeraert, J., Page, B., Antreasian, P., Mazarico, E., Getzandanner, K., Rowlands, D., Moreau, M. C., Small, J., Highsmith, D. E., Goossens, S., Palmer, E. E., Weirich, J. R., Gaskell, R. W., Barnouin, O. S., Daly, M. G., Seabrook, J. A., Al Asad, M. M., Philpott, L. C., Johnson, C. L., Hartzell, C. M., Hamilton, V. E., Michel, P., Walsh, K. J., Nolan, M. C., and Lauretta, D. S.

Abstract

The gravity field of a small body provides insight into its internal mass distribution. We used two approaches to measure the gravity field of the rubble-pile asteroid (101955) Bennu: (i) tracking and modeling the spacecraft in orbit about the asteroid and (ii) tracking and modeling pebble-sized particles naturally ejected from Bennu’s surface into sustained orbits. These approaches yield statistically consistent results up to degree and order 3, with the particle-based field being statistically significant up to degree and order 9. Comparisons with a constant-density shape model show that Bennu has a heterogeneous mass distribution. These deviations can be modeled with lower densities at Bennu’s equatorial bulge and center. The lower-density equator is consistent with recent migration and redistribution of material. The lower-density center is consistent with a past period of rapid rotation, either from a previous Yarkovsky-O’Keefe-Radzievskii-Paddack cycle or arising during Bennu’s accretion following the disruption of its parent body.

14. Episodes of particle ejection from the surface of the active asteroid (101955) Bennu

Author

Lauretta, D. S., Hergenrother, C. W., Chesley, S. R., Leonard, J. M., Pelgrift, J. Y., Adam, C. D., Al Asad, M., Antreasian, P. G., Ballouz, R.-L., Becker, K. J., Bennett, C. A., Bos, B. J., Bottke, W. F., Brozovic, M., Campins, H., Connolly Jr., H. C., Daly, M. G., Davis, A. B., de Leon, J., DellaGiustina, D. N., Drouet d'Aubigny, C. Y., Dworkin, J. P., Emery, J. P., Farnocchia, D., Glavin, D. P., Golish, D. R., Hartzell, C. M., Jacobson, R. A., Jawin, E. R., Jenniskens, P., Kidd Jr., J. N., Lessac-Chenen, E. J., Li, J.-Y., Libourel, G., Licandro, J., Liounis, A. J., Maleszewski, C. K., Manzoni, C., May, B., McCarthy, L. K., McMahon, J., Michel, P., Molaro, J. L., Moreau, M. C., Nelson, D. S., Owen Jr., W. M., Rizk, B., Roper, H. L., Rozitis, B., Sahr, E. M., Scheeres, D. J., Seabrook, J. A., Selznick, S. H., Takahashi, Y., Thuillet, F., Tricarico, P., Vokrouhlicky, D., Wolner, C. W. V., Lauretta, D. S., Hergenrother, C. W., Chesley, S. R., Leonard, J. M., Pelgrift, J. Y., Adam, C. D., Al Asad, M., Antreasian, P. G., Ballouz, R.-L., Becker, K. J., Bennett, C. A., Bos, B. J., Bottke, W. F., Brozovic, M., Campins, H., Connolly Jr., H. C., Daly, M. G., Davis, A. B., de Leon, J., DellaGiustina, D. N., Drouet d'Aubigny, C. Y., Dworkin, J. P., Emery, J. P., Farnocchia, D., Glavin, D. P., Golish, D. R., Hartzell, C. M., Jacobson, R. A., Jawin, E. R., Jenniskens, P., Kidd Jr., J. N., Lessac-Chenen, E. J., Li, J.-Y., Libourel, G., Licandro, J., Liounis, A. J., Maleszewski, C. K., Manzoni, C., May, B., McCarthy, L. K., McMahon, J., Michel, P., Molaro, J. L., Moreau, M. C., Nelson, D. S., Owen Jr., W. M., Rizk, B., Roper, H. L., Rozitis, B., Sahr, E. M., Scheeres, D. J., Seabrook, J. A., Selznick, S. H., Takahashi, Y., Thuillet, F., Tricarico, P., Vokrouhlicky, D., and Wolner, C. W. V.

Abstract

Active asteroids are those that show evidence of ongoing mass loss. We report repeated instances of particle ejection from the surface of (101955) Bennu, demonstrating that it is an active asteroid. The ejection events were imaged by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) spacecraft. For the three largest events, we estimated the ejected particle velocities and sizes, event times, source regions, and energies. We also determined the trajectories and photometric properties of several gravitationally bound particles that orbited temporarily in the Bennu environment. We consider multiple hypotheses for the mechanisms that lead to particle ejection for the largest events, including rotational disruption, electrostatic lofting, ice sublimation, phyllosilicate dehydration, meteroid impacts, thermal stress fracturing, and secondary impacts.

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