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Your search keyword '"Chiorny, V. G."' showing total 14 results
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14 results on '"Chiorny, V. G."'

1. Observations of asteroid magnitude-phase relations at the Kharadze Abastumani Astrophysical Observatory

Author

Shevchenko1, V. G., Inasaridze, R. Ya., Krugly, Yu. N., Ayvazian, V. V., Kapanadze, G. V., Datashvili, G., Slyusarev, I. G., Chiorny, V. G., and Molotov, I. E.

Subjects
Astrophysics - Earth and Planetary Astrophysics, F.2.2
Abstract

In frame of an implementation of the cooperative program studying of asteroids between the Kharadze Abastumani Astrophysical Observatory and the Astronomical Institute of V.N. Karazin Kharkiv National University the observations for five main-belt asteroids were performed to obtain their magnitude-phase relations and other physical characteristics. Preliminary results of the photometrical observations for the large dark asteroid (1390) Abastumani are presented., Comment: 6 pages,3 figures

Published
2022

2. YORP and Yarkovsky effects in asteroids (1685) Toro, (2100) Ra-Shalom, (3103) Eger, and (161989) Cacus

Author

Durech, J., Vokrouhlicky, D., Pravec, P., Hanus, J., Farnocchia, D., Krugly, Yu. N., Ayvazian, V. R., Fatka, P., Chiorny, V. G., Gaftonyuk, N., Galad, A., Groom, R., Hornoch, K., Inasaridze, R. Y., Kucakova, H., Kusnirak, P., Lehky, M., Kvaratskhelia, O. I., Masi, G., Molotov, I. E., Oey, J., Pollock, J. T., Shevchenko, V. G., Vrastil, J., and Warner, B. D.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The rotation states of small asteroids are affected by a net torque arising from an anisotropic sunlight reflection and thermal radiation from the asteroids' surfaces. On long timescales, this so-called YORP effect can change asteroid spin directions and their rotation periods. We analyzed lightcurves of four selected near-Earth asteroids with the aim of detecting secular changes in their rotation rates that are caused by YORP. We use the lightcurve inversion method to model the observed lightcurves and include the change in the rotation rate $\mathrm{d} \omega / \mathrm{d} t$ as a free parameter of optimization. We collected more than 70 new lightcurves. For asteroids Toro and Cacus, we used thermal infrared data from the WISE spacecraft and estimated their size and thermal inertia. We also used the currently available optical and radar astrometry of Toro, Ra-Shalom, and Cacus to infer the Yarkovsky effect. We detected a YORP acceleration of $\mathrm{d}\omega / \mathrm{d} t = (1.9 \pm 0.3) \times 10^{-8}\,\mathrm{rad}\,\mathrm{d}^{-2}$ for asteroid Cacus. For Toro, we have a tentative ($2\sigma$) detection of YORP from a significant improvement of the lightcurve fit for a nonzero value of $\mathrm{d}\omega / \mathrm{d} t = 3.0 \times 10^{-9}\,\mathrm{rad}\,\mathrm{d}^{-2}$. For asteroid Eger, we confirmed the previously published YORP detection with more data and updated the YORP value to $(1.1 \pm 0.5) \times 10^{-8}\,\mathrm{rad}\,\mathrm{d}^{-2}$. We also updated the shape model of asteroid Ra-Shalom and put an upper limit for the change of the rotation rate to $|\mathrm{d}\omega / \mathrm{d} t| \lesssim 1.5 \times 10^{-8}\,\mathrm{rad}\,\mathrm{d}^{-2}$. Ra-Shalom has a greater than $3\sigma$ Yarkovsky detection with a theoretical value consistent with observations assuming its size and/or density is slightly larger than the nominally expected values.

Published
2017
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5. YORP and Yarkovsky effects in asteroids (1685) Toro, (2100) Ra-Shalom, (3103) Eger, and (161989) Cacus

Author

Ďurech, J., primary, Vokrouhlický, D., additional, Pravec, P., additional, Hanuš, J., additional, Farnocchia, D., additional, Krugly, Yu. N., additional, Inasaridze, R. Y., additional, Ayvazian, V. R., additional, Fatka, P., additional, Chiorny, V. G., additional, Gaftonyuk, N., additional, Galád, A., additional, Groom, R., additional, Hornoch, K., additional, Kučáková, H., additional, Kušnirák, P., additional, Lehký, M., additional, Kvaratskhelia, O. I., additional, Masi, G., additional, Molotov, I. E., additional, Oey, J., additional, Pollock, J. T., additional, Shevchenko, V. G., additional, Vraštil, J., additional, and Warner, B. D., additional

Published
2018
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6. Photometry of asteroids: Lightcurves of 24 asteroids obtained in 1993–2005

Author

Chiorny, V. G., Shevchenko, V. G., Krugly, Y.-U. N., Velichko, F. P., and Gaftonyuk, N. M.

Abstract

The results of 1993–2005 photometric observations for 24 main-belt asteroids: 24 Themis, 51 Nemausa, 89 Julia, 205 Martha, 225 Henrietta, 387 Aquitania, 423 Diotima, 505 Cava, 522 Helga, 543 Charlotte, 663 Gerlinde, 670 Ottegebe, 693 Zerbinetta, 694 Ekard, 713 Luscinia, 800 Kressmania, 1251 Hedera, 1369 Ostanina, 1427 Ruvuma, 1796 Riga, 2771 Polzunov, 4908 Ward, 6587 Brassens and 16541 1991 PW18 are presented. The rotation periods of nine of these asteroids have been determined for the first time and others have been improved.

Published
2007

7. (16635) 1993 QO

Author

Pray, D. P., Pravec, P., Kusnirak, P., Hornoch, K., Krugly, Yurij N., Chiorny, V. G., Husarik, M., Pikler, M., Világi, Jozef, Gajdos, Stefan, Galád, Adrián, Cooney, W., Gross, J., Terrell, D., Gaftonyuk, Ninel M., Stephens, R., Durkee, R., Marchis, Franck, Baek, M., Macomber, B., Reddy, V., Colas, François, Lecacheux, Jean, Ries, J., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2007

8. Detection of the YORP effect in asteroid (1620) Geographos

Author

Ďurech, J., primary, Vokrouhlický, D., additional, Kaasalainen, M., additional, Higgins, D., additional, Krugly, Yu. N., additional, Gaftonyuk, N. M., additional, Shevchenko, V. G., additional, Chiorny, V. G., additional, Hamanowa, H., additional, Reddy, V., additional, and Dyvig, R. R., additional

Published
2008
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9. Kharkiv study of near-Earth asteroids

Author

Krugly, Yu. N., primary, Gaftonyuk, N. M., additional, Belskaya, I. N., additional, Chiorny, V. G., additional, Shevchenko, V. G., additional, Velichko, F. P., additional, Lupishko, D. F., additional, Konovalenko, A. A., additional, Falkovich, I. S., additional, and Molotov, I. E., additional

Published
2006
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10. Physical model of near-earth asteroid 6489 golevka (1991 JX) from optical and infrared observations.

Author

Mottola, S., primary, Erikson, A., additional, Harris, A. W., additional, Hahn, G., additional, Neukum, G., additional, Buie, M. W., additional, Sears, W. D., additional, Tholen, D. J., additional, Whiteley, R. J., additional, Magnusson, P., additional, Piironen, J., additional, Kwiatkowski, T., additional, Borczyk, W., additional, Howell, E. S., additional, Hicks, M. D., additional, Fevig, R., additional, Krugly, Yu. N., additional, Velichko, F. P., additional, Chiorny, V. G., additional, Gaftonyuk, N. M., additional, di Martino, M., additional, Pravec, P., additional, Sarounova, L., additional, Wolf, M., additional, Worman, W., additional, Davies, J. K., additional, Schober, H.-J., additional, and Pych, W., additional

Published
1997
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12. Opposition polarimetry and photometry of the low albedo asteroid 419 Aurelia

Author

Belskaya, I. N., Shevchenko, V. G., Efimov, Yu S., Shakhovskoj, N. M., Shkuratov, Yu G., Gaftonyuk, N. M., Gil-Hutton, R., Yurij Krugly, Chiorny, V. G., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

13. CCD photometry of near-earth asteroids in 2001

Author

Yurij Krugly, Belskaya, I. N., Chiorny, V. G., Shevchenko, V. G., Gaftonyuk, N. M., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

14. The Near-Earth Objects Follow-up Program: IV. CCD Photometry in 1996–1999

Author

Krugly, Yu. N., Belskaya, I. N., Shevchenko, V. G., Chiorny, V. G., Velichko, F. P., Mottola, S., Erikson, A., Hahn, G., Nathues, A., Neukum, G., Gaftonyuk, N. M., and Dotto, E.

Subjects
*LIGHT curves, *NEAR-earth asteroids, *PHOTOMETRY
Abstract

Lightcurve observations of 16 near-Earth objects (NEOs) and 2 Mars-crossers in 1996–1999 from three observational sites are presented. Eight objects were observed shortly after their discovery within the follow-up program of NEO observations. We were able to determine rotation periods for 14 asteroids. For 8 objects (5626, 5732, 1998 FM5, 1998 FX2, 1998 UT18, 1998 VO33, 1999 RQ36, 1999 US3) our determinations constitute new results while in the remaining 6 cases (3200, 4341, 7025, 7822, 11066, 1992 QN) we could improve or confirm previously published periods. We also put constraints on the spin vector of 3200 Phaethon. [Copyright &y& Elsevier]

Published
2002
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