Gaia Data Release 2. Observations of solar system objects

0495463 - ASÚ 2019 RIV FR eng J - Článek v odborném periodiku
Spoto, F. - Tanga, P. - Mignard, F. - Berthier, J. - Carry, B. - Cellino, A. - Dell'Oro, A. - Hestroffer, D. - Muinonen, K. - Pauwels, T. - Koubský, Pavel - Votruba, Viktor … celkem 451 autorů
Gaia Data Release 2. Observations of solar system objects.
Astronomy & Astrophysics. Roč. 616, August (2018), č. článku A13. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA MŠMT(CZ) LG15010
Grant ostatní: ESA(XE) ESA-PECS project no. 98058
Institucionální podpora: RVO:67985815
Klíčová slova: astrometry * minor planets * data analysis
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 6.209, rok: 2018

We explain the processing of SSO data, and describe the criteria we used to select the sample published in Gaia DR2. We then explore the data set to assess its quality. The overall astrometric performance is close to the expectations, with an optimal range of brightness G similar to 12 - 17. In this range, the typical transit-level accuracy is well below 1 mas. For fainter asteroids, the growing photon noise deteriorates the performance. Asteroids brighter than G similar to 12 are affected by a lower performance of the processing of their signals. The dramatic improvement brought by Gaia DR2 astrometry of SSOs is demonstrated by comparisons to the archive data and by preliminary tests on the detection of subtle non-gravitational effects.
Trvalý link: http://hdl.handle.net/11104/0288438