Size and Shape of Jupiter Trojan (2207) Antenor from Stellar Occultations
Size and Shape of Jupiter Trojan (2207) Antenor from Stellar Occultations
Librating around the Lagrange L5, the Jupiter's Trojan (2207) Antenor has been observed in recent years and its rotational light curve suggests it to be a very likely binary asteroid candidate. From stellar occultations, we report results from three events from Europe and North America to estimate the 2D apparent size and shape of Jupiter's Trojan (2207) Antenor. For the best-fitted ellipse in the sky-plane, we determined that Antenor has a 2D apparent equatorial radius of 54.30 +/- 0.99 km at the moment of the occultations, with an apparent oblateness of 0.144 +/- 0.051. We highlight the positive detection from 2021 June 12, which shows an intriguing feature that can be interpreted as a very large topographical feature (of about 11 km) of the body or that can provide further evidence that this object is, in fact, a close or contact binary. We also determine astrometric positions, with uncertainties of a few milliarcseconds (mas) for our preferred solutions.
Feliphe S. Ferreira、Julio I. B. Camargo、Bruno E. Morgado、Viviane Peixoto、Josselin Desmars、Felipe Braga-Ribas、Altair Gomes-Junior、Bruno Sicardy、Jose Ortiz、R. Vieira-Martins、C. Pereira、Luana Liberato、Marcelo Assafin、Yucel Kilic、Rodrigo Boufleur、Flavia Rommel、Gustavo Benedetti-Rossi、Martin Banda-Huarca、Franck Marchis、Paolo Tanga、Benoit Blanc、Erick Bondoux、Alexandra Burnett、S. Calavia-Belloc、O. Canales-Moreno、Norman Carlson、Matthieu Conjat、Tony George、R. Gonçalves、R. Iglesias-Marzoa、Grego Krannich、D. Lafuente-Aznar、Paul Maley、Jordi Marco、C. Schnabel、Delwin Shand、Kevin Wagner
天文学
Feliphe S. Ferreira,Julio I. B. Camargo,Bruno E. Morgado,Viviane Peixoto,Josselin Desmars,Felipe Braga-Ribas,Altair Gomes-Junior,Bruno Sicardy,Jose Ortiz,R. Vieira-Martins,C. Pereira,Luana Liberato,Marcelo Assafin,Yucel Kilic,Rodrigo Boufleur,Flavia Rommel,Gustavo Benedetti-Rossi,Martin Banda-Huarca,Franck Marchis,Paolo Tanga,Benoit Blanc,Erick Bondoux,Alexandra Burnett,S. Calavia-Belloc,O. Canales-Moreno,Norman Carlson,Matthieu Conjat,Tony George,R. Gonçalves,R. Iglesias-Marzoa,Grego Krannich,D. Lafuente-Aznar,Paul Maley,Jordi Marco,C. Schnabel,Delwin Shand,Kevin Wagner.Size and Shape of Jupiter Trojan (2207) Antenor from Stellar Occultations[EB/OL].(2025-07-25)[2025-08-10].https://arxiv.org/abs/2507.19638.点此复制
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