Compositional properties of planet-crossing asteroids from astronomical surveys

0582317 - ASÚ 2024 RIV FR eng J - Journal Article
Sergeyev, A.V. - Carry, B. - Marsset, M. - Pravec, Petr - Perna, D. - DeMeo, E.F. - Petropoulou, V. - Lazzarin, M. - La Forgia, F. - di Petro, I.
Compositional properties of planet-crossing asteroids from astronomical surveys.
Astronomy & Astrophysics. Roč. 679, November (2023), č. článku A148. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:67985815
Keywords : minor planets * asteroids * data analysis
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.5, year: 2022
Method of publishing: Open access

We aim to characterize the compositions of a large corpus of planet-crossing asteroids and to study how these compositions are related to orbital and physical parameters. We gathered publicly available visible colors of near-Earth objects (NEOs) from the Sloan Digital Sky Survey (SDSS) and SkyMapper surveys. We also computed SDSS-compatible colors from reflectance spectra of the Gaia mission and a compilation of ground-based observations. We determined the taxonomy of each NEO from its colors and studied the distribution of the taxonomic classes and spectral slope against the orbital parameters and diameter. We provide updated photometry for 470 NEOs from the SDSS, and taxonomic classification of 7401 NEOs. We classify 42 NEOs that are mission-accessible, including six of the seven flyby candidates of the ESA Hera mission. We confirm the perihelion dependence of spectral slope among S-type NEOs, likely related to a rejuvenation mechanism linked with thermal fatigue. We also confirm the clustering of A-type NEOs around 1.5-2 AU, and predict the taxonomic distribution of small asteroids in the NEO source regions in the Main Belt.
Permanent Link: https://hdl.handle.net/11104/0350431