Photometry of selected outer main belt asteroids
Shevchenko V.G. Mikhalchenko O.I. Belskaya I.N. Slyusarev I.G. Chiorny V.G. Krugly Y.N. Hromakina T.A. Dovgopol A.N. Kiselev N.N. Rublevsky A.N. Antonyuk K.А. Novichonok A.O. Kusakin A.V. Reva I.V. Inasaridze R.Y. Ayvazian V.V. Kapanadze G.V. Molotov I.E. Oszkiewicz D. Kwiatkowski T.
August 2021Elsevier Ltd
Planetary and Space Science
2021#202
We present new photometric observations for twelve asteroids ((122) Gerda, (152) Atala, (260) Huberta, (665) Sabine, (692) Hippodamia, (723) Hammonia, (745) Mauritia, (768) Struveana, (863) Benkoela, (1113) Katja, (1175) Margo (2057) Rosemary) from the outer part of the main belt aimed to obtain the magnitude-phase curves and to verify geometric albedo and taxonomic class based on their magnitude-phase behaviors. The measured magnitude-phase relations confirm previously determined composition types of (260) Huberta (C-type), (692) Hippodamia (S-type) and (1175) Margo (S-type). Asteroids (665) Sabine and (768) Struveana previously classified as X-type show phase-curve behavior typical for moderate-albedo asteroids and may belong to the M-type. The phase-curve of (723) Hammonia is typical for the S-type which contradicts the previously determined C-type. We confirmed the moderate-albedo of asteroids (122) Gerda and (152) Atala, but their phase-curves are different from typical for the S-type and may indicate more rare compositional types. Based on magnitude-phase behaviors and V-R colors, (2057) Rosemary most probably belongs to M-type, while asteroids (745) Mauritia and (1113) Katja belong to S-complex. The phase curve of the A-type asteroid (863) Benkoela does not cover the opposition effect range and further observations are needed to understand typical features of the phase-curves of A-type asteroids in comparison with other types. We have also determined lightcurve amplitudes of the observed asteroids and obtained new or improved values of the rotation periods for most of them.
Asteroids , Photometry , Rotation , Spectrophotometry
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Institute of Astronomy of V.N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv, 61022, Ukraine
Department of Astronomy and Space Informatics of V.N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv, 61022, Ukraine
Crimean Astrophysical Observatory, Nauchnij, Crimea, Russian Federation
Petrozavodsk State University, Lenin Str. 33, Petrozavodsk, 185910, Republic of Karelia, Russian Federation
Fesenkov Astrophysical Institute, Observatory 23, Almaty, 050020, Kazakhstan
Kharadze Abastumani Astrophysical Observatory, Ilia State University, K. Cholokoshvili Av. 3/5, Tbilisi, 0162, Georgia
Samtskhe-Javakheti State University, Rustaveli Street 113, Akhaltsikhe, 0080, Georgia
Keldysh Institute of Applied Mathematics, RAS, 4 Miusskaya sq., Moscow, 125047, Russian Federation
Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Słoneczna 36, Poznan, 60-286, Poland
Institute of Astronomy of V.N. Karazin Kharkiv National University
Department of Astronomy and Space Informatics of V.N. Karazin Kharkiv National University
Crimean Astrophysical Observatory
Petrozavodsk State University
Fesenkov Astrophysical Institute
Kharadze Abastumani Astrophysical Observatory
Samtskhe-Javakheti State University
Keldysh Institute of Applied Mathematics
Astronomical Observatory Institute
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