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292 results on '"CELLINO, Alberto"'

51. Estimation of the exposure of the TUS space-based cosmic ray observatory

Author

JEM-EUSO Collaboration, Fenu, Francesco, Shinozaki, Kenji, Zotov, Mikhail, Bertaina, Mario E., Castellina, Antonella, Cellino, Alberto, Klimov, Pavel A., Abdellaoui, G., Abe, S., Adams, James H., Allard, D., Alonso, G., Anchordoqui, Luis Alfredo, Anzalone, Anna, Arnone, Enrico, Asano, Katsuaki, Attallah, Reda, Attoui, H., Ave Pernas, Maximo David, Bagheri, Mahdi, and Peter, Thomas

Subjects
Cosmic ray detectors, Observatories, Cosmology, Geographical distribution, Cosmic rays
Abstract

The TUS observatory was the first orbital detector aimed at the detection of ultra-high energy cosmic rays (UHECRs). It was launched on April 28, 2016, from the Vostochny cosmodrome in Russia and operated until December 2017. It collected ∼ 80, 000 events with a time resolution of 0.8 μs. A fundamental parameter to be determined for cosmic ray studies is the exposure of an experiment. This parameter is important to estimate the average expected event rate as a function of energy and to calculate the absolute flux in case of event detection. Here we present results of a study aimed to calculate the exposure that TUS accumulated during its mission. The role of clouds, detector dead time, artificial sources, storms, lightning discharges, airglow and moon phases is studied in detail. An exposure estimate with its geographical distribution is presented. We report on the applied technique and on the perspectives of this study in view of the future missions of the JEM-EUSO program., PoS: Proceedings of Science, 395, ISSN:1824-8039, Proceedings of 37th International Cosmic Ray Conference

Published
2022

52. NEOROCKS: An innovative and pragmatic approach to planetary defense

Author

Petropoulou, Vasiliki, Dotto, Elisabetta, Banaszkiewicz, Marek, Bianchi, Sara, Barucci, Maria Antonietta, Bernardi, Fabrizio, Birlan, Mirel, Carry, Benoit, Cellino, Alberto, de Leon, Julia, Lazzarin, Monica, Mazzotta Epifani, Elena, Ieva, Simone, Mediavilla Garay, Anabel, Nomen Torres, Jaime, Perna, Davide, Perozzi, Ettore, Pravec, Petr, and Teodorescu, Claudiu

Subjects
Near Earth Asteroids, Horizon2020, NEOROCKS, Horizon2020, Near Earth Asteroids, NEOROCKS
Published
2022

53. Asteroid Families

Author

Zappalà, Vincenzo, Cellino, Alberto, Milani, A., editor, Di Martino, M., editor, and Cellino, A., editor

Published
1994
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56. Asteroids

Author

Cellino, Alberto, primary, Gil-Hutton, Ricardo, additional, and Belskaya, Irina, additional

Published
2015
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60. Analysis of meteors observed in the UV by the Mini-EUSO telescope onboard the International Space Station

Author

Barghini, Dario, Battisti, Matteo, Belov, Alexander, Bertaina, Mario Edoardo, Bertone, Sara, Bisconti, Francesca, Capel, Francesca, Casolino, Marco, Cellino, Alberto, Ebisuzaki, Toshikazu, Gardiol, Daniele, Klimov, Pavel, Marcelli, Laura, Miyamoto, Hiroko, Picozza, Piergiorgio, Piotrowski, Lech Wiktor, Prévot, Guillaume, Reali, Enzo, Sakaki, Naoto, and Takizawa, Yoshiyuki

Abstract

During its first six months of operations onboard the Zvezda module of the International Space Station, the Mini-EUSO wide-field telescope detected more than two thousand meteors in approximately 40 hours of data taking. Mini-EUSO observes the Earth’s atmosphere in the UV range (290 – 430 nm) with a field of view of about 44° x 44° through a nadir-facing, UV-transparent window with a focal surface of 48 x 48 pixels and a resolution of about 6.3 km on ground. While temporal resolution and triggering are at the timescales of 2.5 μs to potentially record UHECR showers and TLEs, Mini-EUSO performs a continuous monitoring of the UV emission at a 40.96 ms timescale, where meteors are recorded. We developed an analysis pipeline able to offline detect, track and characterize meteor events and subsequently compute their physical parameters, such as tangential speed, magnitude, duration and trajectory azimuth. In this contribution, we present the implemented reduction methods and the results of the analysis of the sample, providing comparisons with existing databases of meteors observed in the optical band.

Published
2021
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61. Polarization of Asteroid (387) Aquitania: The newest member of a class of large inversion angle asteroids

Author

Masiero, Joseph and Cellino, Alberto

Subjects
Temperature inversions, Spinel group, Astronomy, Earth sciences
Abstract

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.icarus.2008.10.003 Byline: Joseph Masiero (a), Alberto Cellino (b) Keywords: Asteroids; surfaces; Polarimetry Abstract: We present new imaging polarimetric observations of two Main Belt asteroids, (234) Barbara and (387) Aquitania, taken in the first half of 2008 using the Dual-Beam Imaging Polarimeter on the University of Hawaii 2.2 m telescope, located on Mauna Kea, Hawaii. Barbara had been previously shown to exhibit a very unusual polarization-phase curve by [Cellino, A., Belskaya, I.N., Bendjoya, Ph., di Martino, M., Gil Hutton, R., Muinonen, K., Tedesco, E.F., 2006. Icarus 180, 565-567]. Our observations confirm this result and add Aquitania to the growing class of large inversion angle objects. Interestingly, these asteroids show spinel features in their IR spectra suggesting a mineralogical origin to the phase angle-dependent polarimetric features. As spinel is associated with calcium-aluminum-rich inclusions and carbonaceous chondrites, these large inversion angle asteroids may represent some of the oldest surfaces in the Solar System. Circular as well as linear polarization measurements were obtained but circular polarization was not detected. Author Affiliation: (a) Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA (b) INAF -- Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy Article History: Received 20 August 2008; Revised 3 October 2008; Accepted 6 October 2008

Published
2009

62. DIMS Experiment for Dark Matter and Interstellar Meteoroid Study

Author

Kajino, Fumiyoshi, primary, Abe, Shinsuke, additional, Arahori, Mizuho, additional, Barghini, Dario, additional, Bertaina, Mario Edoardo, additional, Casolino, Marco, additional, Cellino, Alberto, additional, Covault, Corbin, additional, Ebisuzaki, Toshikazu, additional, Endo, Mirai, additional, Fujioka, Momoka, additional, Fujiwara, Yasunori, additional, Gardiol, Daniele, additional, Hajdukova, Maria, additional, Hasegawa, Mari, additional, Ide, Ryushin, additional, Iwami, Yugo, additional, Kasztelan, Marcin, additional, Kikuchi, Keita, additional, Kim, Soon-Wook, additional, Kojro, Mateusz, additional, Matthews, John N., additional, Nadamoto, Kaoru, additional, Park, Il H., additional, PIOTROWSKI, Lech Wiktor, additional, Sagawa, Hiroyuki, additional, Shinozaki, Kenji, additional, Shinto, Daiki, additional, Sidhu, Jagjit Singh, additional, Starkman, Glenn, additional, Tada, Sachiko, additional, Takizawa, Yoshiyuki, additional, Tameda, Yuichiro, additional, Valenti, Simone, additional, and Vrábel, Michal, additional

Published
2021
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63. Characterization of the DIMS system based on astronomical meteor techniques for macroscopic dark matter search

Author

Barghini, Dario, primary, Valenti, Simone, additional, Abe, Shinsuke, additional, Arahori, Mizuho, additional, Bertaina, Mario E., additional, Casolino, Marco, additional, Cellino, Alberto, additional, Covault, Corbin, additional, Ebisuzaki, Toshikazu, additional, Fujiwara, Yasunori, additional, Gardiol, Daniele, additional, Hajdukova, Maria, additional, Ide, Ryushin, additional, Iwami, Yugo, additional, Kajino, Fumiyoshi, additional, Kim, Soon-Wook, additional, Matthews, John N., additional, Nadamoto, Kaoru, additional, Park, Il H., additional, Piotrowski, Lech, additional, Sagawa, Hiroyuki, additional, Shinozaki, Kenji, additional, Shinto, Daiki, additional, Sidhu, Jagjit Singh, additional, Starkman, Glenn, additional, Tada, Sachiko, additional, Takizawa, Yoshiyuki, additional, and Tameda, Yuichiro, additional

Published
2021
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68. Unusual polarimetric properties for interstellar comet 2I/Borisov

Author

Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Bagnulo, Stefano, Cellino, Alberto, Kolokolova, Ludmilla, Nežič, Rok, Santana-Ros, Toni, Borisov, Galin, Christou, Apostolos, Bendjoya, Philippe, Devogèle, Maxime, Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Bagnulo, Stefano, Cellino, Alberto, Kolokolova, Ludmilla, Nežič, Rok, Santana-Ros, Toni, Borisov, Galin, Christou, Apostolos, Bendjoya, Philippe, and Devogèle, Maxime

Abstract

So far, only two interstellar objects have been observed within our Solar System. While the first one, 1I/‘Oumuamua, had asteroidal characteristics, the second one, 2I/Borisov, showed clear evidence of cometary activity. We performed polarimetric observations of comet 2I/Borisov using the European Southern Observatory Very Large Telescope to derive the physical characteristics of its coma dust particles. Here we show that the polarization of 2I/Borisov is higher than what is typically measured for Solar System comets. This feature distinguishes 2I/Borisov from dynamically evolved objects such as Jupiter-family and all short- and long-period comets in our Solar System. The only object with similar polarimetric properties as 2I/Borisov is comet C/1995 O1 (Hale-Bopp), an object that is believed to have approached the Sun only once before its apparition in 1997. Unlike Hale-Bopp and many other comets, though, comet 2I/Borisov shows a polarimetrically homogeneous coma, suggesting that it is an even more pristine object.

Published
2021

69. Unusual polarimetric properties for interstellar comet 2I/Borisov

Author

Generalitat Valenciana, Bagnulo, S., Cellino, Alberto, Kolokolova, L., Nežič, R., Santana-Ros, Toni, Borisov, G., Christou, Anastasis, Bendjoya, P., Devogèle, M., Generalitat Valenciana, Bagnulo, S., Cellino, Alberto, Kolokolova, L., Nežič, R., Santana-Ros, Toni, Borisov, G., Christou, Anastasis, Bendjoya, P., and Devogèle, M.

Abstract

So far, only two interstellar objects have been observed within our Solar System. While the first one, 1I/‘Oumuamua, had asteroidal characteristics, the second one, 2I/Borisov, showed clear evidence of cometary activity. We performed polarimetric observations of comet 2I/Borisov using the European Southern Observatory Very Large Telescope to derive the physical characteristics of its coma dust particles. Here we show that the polarization of 2I/Borisov is higher than what is typically measured for Solar System comets. This feature distinguishes 2I/Borisov from dynamically evolved objects such as Jupiter-family and all short- and long-period comets in our Solar System. The only object with similar polarimetric properties as 2I/Borisov is comet C/1995 O1 (Hale-Bopp), an object that is believed to have approached the Sun only once before its apparition in 1997. Unlike Hale-Bopp and many other comets, though, comet 2I/Borisov shows a polarimetrically homogeneous coma, suggesting that it is an even more pristine object.

Published
2021

71. MIDI observations of 1459 Magnya: first attempt of interferometric observations of asteroids with the VLTI

Author

Delbo, Marco, Gai, Mario, Lattanzi, Mario G., Ligori, Sebastiano, Loreggia, Davide, Saba, Laura, Cellino, Alberto, Gandolfi, Davide, Licchelli, Domenico, Blanco, Carlo, Cigna, Massimo, and Wittkowski, Markus

Subjects
Asteroids -- Observations, Asteroids -- Properties, Infrared astronomy -- Research, Photometry -- Research, Photometry -- Usage, Astronomy, Earth sciences
Abstract

The Very Large Telescope Interferometer (VLTI) of the European Southern Observatory (ESO) can be used to obtain direct determination of the sizes and the albedos of asteroids. We present results of the first attempt to carry out interferometric observations of asteroids with the Mid Infrared Interferometric Instrument (MIDI) at the VLTI. Our target was 1459 Magnya. This is the only V-type asteroid known to exist in the outer main-belt, and its IRAS-albedo turns out to be rather low for an object of this taxonomic class. Interferometric fringes were not detected, very likely due to the fact that the flux emitted by the asteroid was lower than expected and below the MIDI threshold for fringe detection. However, by fitting the Standard Thermal Model to the N-band infrared flux measured by MIDI in photometric mode and to the visible absolute magnitude, obtained from quasi-simultaneous B- and V-band photometric observations, we have derived a geometric visible albedo of 0.37 [+ or -] 0.06 and an effective diameter of 17 [+ or -] 1 km. This new estimate of the albedo differs from that previously obtained by IRAS and is more consistent with the V-type taxonomic classification of 1459 Magnya. Keywords: Asteroids; Infrared observations; Photometry; Instrumentation

Published
2006

72. A polarimetric study of Asteroid 25143 Itokawa

Author

Cellino, Alberto, Yoshida, Fumi, Anderlucci, E., Bendjoya, Philippe, Di Martino, Mario, Ishiguro, Masateru, Nakamura, Akiko M., and Saito, Jun

Subjects
Asteroids -- Observations, Astronomy, Earth sciences
Abstract

The near-Earth Asteroid 25143 Itokawa, the target of the Japanese space mission Hayabusa, was observed in June, 2004 with the Torino photopolarimeter attached at the 2.15 m telescope of the El Leoncito Observatory (Argentina). The degree of linear polarization in five colors was measured over a wide range of phase angles, between 40[degrees] and 80[degrees]. The data obtained are sufficient to derive an estimate of the asteroid's albedo of 0.24 [+ or -] 0.01, which is in good agreement with the S-type taxonomic classification of this object. The phase-polarization curve has been sampled in UBVRI colors, covering a wide range of phase angles that cannot be reached by Earth-based observations of Main Belt asteroids. Keywords: Asteroids, Itokawa; Polarimetry

Published
2005

73. Spectroscopic observations of Jupiter Trojans

Author

Bendjoya, Philippe, Cellino, Alberto, Di Martino, Mario, and Saba, Laura

Subjects
Satellites -- Jupiter, Satellites -- Observations, Asteroids -- Observations, Astronomy, Earth sciences
Abstract

We present the results of a campaign of spectroscopic observations of Jupiter Trojan asteroids. Thirty-four objects were observed during three runs in July and November 1998, and March 2002 using the Danish 1.54-m telescope at ESO. The covered spectral range was between 5000 and 9000 [Angstrom]. Our observations include objects belonging both [L.sub.4] to [L.sub.5] clouds. According to analyses of previous investigations of Trojans, the spectra of different taxonomic classes can be separated on the basis of the slope of the reflectance spectrum. The large majority of the objects of our sample have been found to belong to the D taxonomic class, but we found also objects of P- and C-type. In two cases, we found also evidence of blueish spectral trends. Our data are important, since they allow us to substantially enlarge the whole data set of available Trojan spectra. Keywords: Asteroids; Spectroscopy

Published
2004

74. Opposition polarimetry and photometry of S- and E-type asteroids

Author

Belskaya, Irina N., Shevchenko, Vasilij G., Kiselev, Nikolaj N., Krugly, Yurij N., Shakhovskoy, Nikolaj M., Efimov, Yurij S., Gaftonyuk, Ninel M., Cellino, Alberto, and Gil-Hutton, Ricardo

Subjects
Asteroids -- Research, Astronomy, Earth sciences
Abstract

The first results of the observational program devoted to simultaneous investigation of asteroid polarimetric and photometric opposition phenomena are presented. UBVRI polarimetric and V-band photometric observations of the S-type Asteroid 20 Massalia and the E-type Asteroids 214 Aschera and 620 Drakonia were carried out in 1996-1999 down to phase angles of 0.08[degrees], 0.7[degrees], and 1.2[degrees], correspondingly. The S-type Asteroid 20 Massalia is characterized by the pronounced brightness opposition surge with an amplitude larger than that observed for the E-type asteroids. A sharp peak of negative polarization at small phase angles was not observed for this asteroid. The value of polarization degree at phase angle [alpha] < 1 [degrees] is less than 0.5% for both S and E types. The negative polarization branches of S and especially E-asteroids have an asymmetrical shape. The phase angle at which the polarization minimum occurs is close to the angle at which non-linear increase begins in the asteroid magnitude phase curves. A relation of the observed effects to the mechanism of coherent backscattering is discussed. Keywords: Asteroids; Photometry; Polarimetry; Opposition effect; Backscattering

Published
2003

82. The Eunomia Family: A Visible Spectroscopic Survey

Author

Lazzaro, Daniela, Nothe-Diniz, Thais, Carvano, Jorge M., Angeli,Claudia A., Betzler, Alberto S., Florczak, Marcos, Cellino, Alberto, Martino, Mario Di, Doressoundiram, Alain, Barucci, Maria A., Dotto, Elisabetta, and Bendjoya, Philippe

Subjects
Asteroids -- Composition, Astronomical spectroscopy -- Analysis, Solar system -- Research, Galaxies -- Evolution, Astronomy, Earth sciences
Abstract

We observed 44 Eunomia family members at ESO (European Southern Observatory) and at CASLEO (Complejo Astronomico El Leoncito) in the wavelength range of 4900-9200 (angstroms). We found 41 objects with the same characteristics: a maximum around (lambda) = 7500 (angstroms), and a reflectivity gradient spanning a continuous but limited range. Only 3 objects display featureless spectra similar to C-type asteroids, and these should be considered as interlopers. The spectra of the 41 objects show a similarity which is consistent with the dynamical hypothesis of a common origin. On the other hand, the spread of distribution of surface composition also indicates that the Eunomia family was possibly formed from the fragmentation of a partially differentiated S-type parent body. Key Words: asteroids; asteroids, composition; spectroscopy; surfaces, asteroids.

Published
1999

83. GaiaNIR: Combining optical and Near-Infra-Red (NIR) capabilities with Time-Delay-Integration (TDI) sensors for a future Gaia-like mission

Author

Hobbs, David, Høg, Erik, Mora, Alcione, Crowley, Cian, Mcmillan, Paul, Ranalli, Piero, Heiter, Ulrike, Jordi, Carme, Hambly, Nigel, Church, Ross, Anthony, Brown, Tanga, Paolo, Chemin, Laurent, Portail, Jordi, Jiménez-Esteban, Fran, Klioner, Sergei, Mignard, François, Fynbo, Johan, Wyrzykowski, Łukasz, Rybicki, Krzysztof, Anderson, Richard I., Cellino, Alberto, Fabricius, Claus, Davidson, Michael, Lindegren, Lennart, Fernandez Trincado, Jose Gregorio, Department of Chemistry, UCL, Christopher Ingold Laboratories, Uppsala University, Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etude et de Recherches en Géodynamique et Astronomie (CERGA), Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Astronomical Observatory [Warsaw], Faculty of Physics [Warsaw] (FUW), University of Warsaw (UW)-University of Warsaw (UW), INAF - Osservatorio Astrofisico di Torino (OATo), Istituto Nazionale di Astrofisica (INAF), Open University of Israël, Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Université de Franche-Comté (UFC), and Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

ESA recently called for new "Science Ideas" to be investigated in terms of feasibility and technological developments -- for technologies not yet sufficiently mature. These ideas may in the future become candidates for M or L class missions within the ESA Science Program. With the launch of Gaia in December 2013, Europe entered a new era of space astrometry following in the footsteps of the very successful Hipparcos mission from the early 1990s. Gaia is the successor to Hipparcos, both of which operated in optical wavelengths, and Gaia is two orders of magnitude more accurate in the five astrometric parameters and is surveying four orders of magnitude more stars in a vast volume of the Milky Way. The combination of the Hipparcos/Tycho-2 catalogues with the first early Gaia data release will give improved proper motions over a long ~25 year baseline. The final Gaia solution will also establish a new optical reference frame by means of quasars, by linking the optical counterparts of radio (VLBI) sources defining the orientation of the reference frame, and by using the zero proper motion of quasars to determine a non-rotating frame. A weakness of Gaia is that it only operates at optical wavelengths. However, much of the Galactic centre and the spiral arm regions, important for certain studies, are obscured by interstellar extinction and this makes it difficult for Gaia to deeply probe. Traditionally, this problem is overcome by switching to the infra-red but this was not possible with Gaia's CCDs. Additionally, to scan the entire sky and make global absolute parallax measurements the spacecraft must have a constant rotation and this requires that the CCDs operate in TDI mode, increasing their complexity.

Published
2020

86. Asteroid proper phase curves from Gaia photometry

Author

Muinonen, Karri, Penttilä, Antti, Grön, Julia, Cellino, Alberto, Wang, Xiaobin, and Tanga, Paolo

Subjects
asteroid, MCMC, photometric taxonomy, Gaia mission, phase curve, inverse methods
Abstract

Conference proceedings article for the 53rd ESLAB Symposium entitled "The Gaia Universe"

Published
2019
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93. Space Debris Detection and Tracking with the Techniques of Cosmic Ray Physics

Author

Fenu, Francesco, primary, MIYAMOTO, Hiroko, additional, Battisti, Matteo, additional, Belov, Alexander S., additional, Bisconti, Francesca, additional, Bonino, Raffaella, additional, Blin-Bondil, Silvie, additional, Bertaina, Mario E., additional, Cafagna, Francesco, additional, Cambiè, Giorgio, additional, Capel, Francesca, additional, Casolino, Marco, additional, Cellino, Alberto, additional, Churilo, I., additional, Cotto, Giorgio, additional, Djakonow, A., additional, Ebisuzaki, Toshikazu, additional, Fausti, Federico, additional, Fornaro, Claudio, additional, Franceschi, Alberto, additional, Fugelsang, Christer, additional, Gardiol, Daniele, additional, Gorodetzky, Philippe, additional, Kajino, Fumiyoshi, additional, Klimov, Pavel, additional, Marcelli, Laura, additional, Marszal, W., additional, Mignone, Marco, additional, Murashov, A., additional, Napolitano, T., additional, Osteria, Giuseppe, additional, Panasyuk, Mikhail, additional, Parizot, Etienne, additional, Poroshin, A., additional, Picozza, Piergiorgio, additional, Piotrowski, Lech, additional, Plebaniak, Zbigniew, additional, Prévôt, Guillaume, additional, Przybylak, Marika, additional, Reali, E., additional, Ricci, Marco, additional, Sakaki, Naoto, additional, Shinozaki, Kenji, additional, Suino, Gregorio, additional, Szabelski, Jacek, additional, Takizawa, Yoshiyuki, additional, Traiche, M., additional, and Turriziani, Sara, additional

Published
2019
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94. Study for Moving Nuclearites and Interstellar Meteoroids using High Sensitivity CMOS Camera

Author

Kajino, Fumiyoshi, primary, Ide, Ikuo, additional, Ide, Ryushin, additional, Tameda, Yuichiro, additional, Shinozaki, Kenji, additional, Bertaina, Mario E., additional, Cellino, Alberto, additional, Casolino, Marco, additional, Ebisuzaki, Toshikazu, additional, Takizawa, Yoshiyuki, additional, Piotrowski, Lech, additional, Sagawa, Hiroyuki, additional, and Matthews, John N., additional

Published
2019
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95. Search for nuclearites by the satellite-based TUS air fluorescence detector

Author

Shinozaki, Kenji, primary, Montanaro, Antonio, additional, Bertaina, Mario E., additional, Fenu, Francesco, additional, Ferrarese,, Silvia, additional, Klimov, Pavel, additional, Sharakin, Sergey, additional, Zotov, Mikhail, additional, Cellino, Alberto, additional, Castellina, Antonella, additional, Anzalone, Anna, additional, Caruso, Rosella, additional, and Isgró, Fracesco, additional

Published
2019
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97. A comparison between families obtained from different proper elements

Author

Zappala, Vincenzo, Cellino, Alberto, and Farinella, Paolo

Subjects
Astrophysics
Abstract

Using the hierarchical method of family identification developed by Zappala et al., the results coming from the data set of proper elements computed by Williams (about 2100 numbered + about 1200 PLS 2 asteroids) and by Milani and Knezevic (5.7 version, about 4200 asteroids) are compared. Apart from some expected discrepancies due to the different data sets and/or low accuracy of proper elements computed in peculiar dynamical zones, a good agreement was found in several cases. It follows that these high reliability families represent a sample which can be considered independent on the methods used for their proper elements computation. Therefore, they should be considered as the best candidates for detailed physical studies.

Published
1992

98. Simulated families: A test for different methods of family identification

Author

Bendjoya, Philippe, Cellino, Alberto, Froeschle, Claude, and Zappala, Vincenzo

Subjects
Astrophysics
Abstract

A set of families generated in fictitious impact events (leading to a wide range of 'structure' in the orbital element space have been superimposed to various backgrounds of different densities in order to investigate the efficiency and the limitations of the methods used by Zappala et al. (1990) and by Bendjoya et al. (1990) for identifying asteroid families. In addition, an evaluation of the expected interlopers at different significance levels and the possibility of improving the definition of the level of maximum significant of a given family were analyzed.

Published
1992

99. From asteroid clusters to families: A proposal for a new nomenclature

Author

Farinella, Paolo, Davis, Donald R, Cellino, Alberto, and Zappala, Vincenzo

Subjects
Astrophysics
Abstract

Some confusion on the number, reliability, and characteristics of asteroid families is the result of using the single word 'family' for naming asteroid groupings identified in very different ways. Here we propose a new terminology which in our opinion would alleviate this problem.

Published
1992

100. Asteroids III

Author

Bottke, William F., Cellino, Alberto, Paolicchi, Paolo, Binzel, Richard P., Gehrels, Tom, Foreword by, Bottke, William F., Cellino, Alberto, Paolicchi, Paolo, Binzel, Richard P., and Gehrels, Tom

Published
2002
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