Gaia Focused Product Release: Asteroid orbital solution: Properties and assessment

被引：10

作者：

David, P. ^{[1
]}

Mignard, F. ^{[2
]}

Hestroffer, D. ^{[1
]}

Tanga, P. ^{[2
]}

Spoto, F. ^{[3
]}

Berthier, J. ^{[1
]}

Pauwels, T. ^{[4
]}

Roux, W. ^{[5
]}

Barbier, A. ^{[5
]}

Cellino, A. ^{[6
]}

Carry, B. ^{[2
]}

Delbo, M. ^{[2
]}

Dell'Oro, A. ^{[7
]}

Fouron, C. ^{[8
]}

Galluccio, L. ^{[2
]}

Klioner, S. A. ^{[9
]}

Mary, N. ^{[10
]}

Muinonen, K. ^{[11
,12
]}

Ordenovic, C. ^{[2
]}

Oreshina-Slezak, I. ^{[2
]}

Panem, C. ^{[5
]}

Petit, J. -M. ^{[13
]}

Portell, J. ^{[14
,15
,16
]}

Brown, A. G. A. ^{[17
]}

Thuillot, W. ^{[1
]}

Vallenari, A. ^{[18
]}

Prusti, T. ^{[19
]}

de Bruijne, J. H. J. ^{[19
]}

Arenou, F. ^{[20
]}

Babusiaux, C. ^{[21
]}

Biermann, M. ^{[22
]}

Creevey, O. L. ^{[2
]}

Ducourant, C. ^{[23
]}

Evans, D. W. ^{[24
]}

Eyer, L. ^{[25
]}

Guerra, R. ^{[26
]}

Hutton, A. ^{[27
]}

Jordi, C. ^{[14
,15
,16
]}

Lammers, U. ^{[26
]}

Lindegren, L. ^{[28
]}

Luri, X. ^{[14
,15
,16
]}

Randich, S. ^{[7
]}

Sartoretti, P. ^{[20
]}

Smiljanic, R. ^{[29
]}

Walton, N. A. ^{[24
]}

Bailer-Jones, C. A. L. ^{[30
]}

Bastian, U. ^{[22
]}

Cropper, M. ^{[31
]}

Drimmel, R. ^{[6
]}

Katz, D. ^{[20
]}

机构：

[1] Univ Lille, Sorbonne Univ, Univ PSL, IMCCE,Observ Paris,CNRS, 77 Av Denfert Rochereau, F-75014 Paris, France

[2] Univ Cote Azur, Observ Cote Azur, CNRS, Lab Lagrange, Bd Observ,CS 34229, F-06304 Nice 4, France

[3] Harvard Smithsonian Ctr Astrophys, 60 Garden St,MS 15, Cambridge, MA 02138 USA

[4] Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium

[5] CNES Ctr Spatial Toulouse, 18 Ave Edouard Belin, F-31401 Toulouse 9, France

[6] INAF Osservatorio Astrofis Torino, Via Osservatorio 20, I-10025 Pino Torinese, TO, Italy

[7] INAF Osservatorio Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy

[8] Telespazio CNES Ctr Spatial Toulouse, 18 Ave Edouard Belin, F-31401 Toulouse 9, France

[9] Tech Univ Dresden, Lohrmann Observ, Mommsenstr 13, D-01062 Dresden, Germany

[10] Thales Serv CNES Ctr Spatial Toulouse, 18 Ave Edouard Belin, F-31401 Toulouse 9, France

[11] Univ Helsinki, Dept Phys, POB 64, Helsinki 00014, Finland

[12] Finnish Geospatial Res Inst FGI, Vuorimiehentie 5, Espoo 02150, Finland

[13] Univ Franche Comte, OSU THETA Franche Comte Bourgogne, Observ Besancon, Inst UTINAM,CNRS,UMR6213, BP1615, F-25010 Besancon, France

[14] Univ Barcelona, Inst Ciencies Cosmos ICCUB, Marti & Franques 1, E-08028 Barcelona, Spain

[15] Univ Barcelona, Dept Fis Quant & Astrofis FQA, C Marti & Franques 1, E-08028 Barcelona, Spain

[16] Inst Estudis Espacials Catalunya IEEC, C Gran Capita 2-4, Barcelona 08034, Spain

[17] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[18] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[19] European Space Agcy, European Space Res & Technol Ctr ESTEC, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands

[20] Univ PSL, Observat Paris, GEPI, CNRS, 5 Pl Jules Janssen, F-92190 Meudon, France

[21] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[22] Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany

[23] Univ Bordeaux, CNRS, Lab Astrophys Bordeaux, B18N,Allee Geoffroy St Hilaire, F-33615 Pessac, France

[24] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[25] Univ Geneva, Dept Astron, Chemin Pegasi 51, CH-1290 Versoix, Switzerland

[26] European Space Agcy, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, Madrid 28692, Spain

[27] Aurora Technol European Space Agcy ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[28] Lund Univ, Dept Phys, Lund Observ, Div Astrophys, Box 43, S-22100 Lund, Sweden

[29] Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland

[30] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[31] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

[32] Univ Geneva, Dept Astron, Chemin Ecogia 16, CH-1290 Versoix, Switzerland

[33] DAPCOM Data Serv, C Dels Vilabella 5-7, Barcelona 80500, Spain

[34] ALTEC Spa, Corso Marche 79, I-10146 Turin, Italy

[35] Sednai Sarl, Geneva, Switzerland

[36] ESAC, Gaia DPAC Project Off, Camino Bajo Castillo S-N, Madrid 28692, Spain

[37] Telespazio UK SL European Space Agcy ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[38] Sorbonne Univ, Univ PSL, Observ Paris, SYRTE,LNE, 61 Ave Observ, F-75014 Paris, France

[39] Serco Gest Negocios European Space Agcy ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[40] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Piero Gobetti 93-3, I-40129 Bologna, Italy

[41] Univ Liege, Inst Astrophys & Geophys, 19c Allee 6 Aout, B-4000 Liege, Belgium

[42] CRAAG Ctr Rech Astron Astrophys & Geophys, Route Observ,Bp 63, Algiers 16340, Algeria

[43] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[44] RHEA European Space Agcy ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[45] Univ A Coruna, CIGUS CITIC Dept Comp Sci & Informat Technol, Campus Elvina S-N, La Coruna, Spain

[46] ATG Europe European Space Agcy ESA, Camino Bajo Castillo S-N, Madrid 28692, Spain

[47] Kavli Inst Cosmol Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[48] Natl & Kapodistrian Univ Athens, Dept Astrophys Astron & Mech, Athens 15783, Greece

[49] Univ Calif Irvine, Donald Bren Sch Informat & Comp Sci, Irvine, CA 92697 USA

[50] Univ Lisbon, Fac Ciencias, CENTRA, Edif C8, P-1749016 Lisbon, Portugal

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 680卷

基金：

英国科学技术设施理事会;

关键词：

astrometry; celestial mechanics; minor planets; asteroids: general; 1ST SPECTROSCOPIC DATA; DIGITAL SKY SURVEY; 6TH DATA RELEASE; CATALOG; DATABASE; PRECESSION; ASTROMETRY; PARAMETERS; PLANETARY; ASTROPY;

D O I：

10.1051/0004-6361/202347270

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. We report the exploitation of a sample of Solar System observations based on data from the third Gaia Data Release (Gaia DR3) of nearly 157 000 asteroids. It extends the epoch astrometric solution over the time coverage planned for the Gaia DR4, which is not expected before the end of 2025. This data set covers more than one full orbital period for the vast majority of these asteroids. The orbital solutions are derived from the Gaia data alone over a relatively short arc compared to the observation history of many of these asteroids.Aims. The work aims to produce orbital elements for a large set of asteroids based on 66 months of accurate astrometry provided by Gaia and to assess the accuracy of these orbital solutions with a comparison to the best available orbits derived from independent observations. A second validation is performed with accurate occultation timings.Methods. We processed the raw astrometric measurements of Gaia to obtain astrometric positions of moving objects with 1D sub-mas accuracy at the bright end. For each asteroid that we matched to the data, an orbit fitting was attempted in the form of the best fit of the initial conditions at the median epoch. The force model included Newtonian and relativistic accelerations to derive the observation equations, which were solved with a linear least-squares fit.Results. Orbits are provided in the form of state vectors in the International Celestial Reference Frame for 156 764 asteroids, including near-Earth objects, main-belt asteroids, and Trojans. For the asteroids with the best observations, the (formal) relative uncertainty sigma(a)/a is better than 10(-10). Results are compared to orbits available from the Jet Propulsion Laboratory and MPC. Their orbits are based on much longer data arcs, but from positions of lower quality. The relative differences in semi-major axes have a mean of 5 x 10(-10) and a scatter of 5 x 10(-9).

引用

页数：24

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