Size and Shape of Jupiter Trojan (2207) Antenor from Stellar Occultations
Abstract
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.
Keywords
Cite
@article{arxiv.2507.19638,
title = {Size and Shape of Jupiter Trojan (2207) Antenor from Stellar Occultations},
author = {Feliphe S. Ferreira and Julio I. B. Camargo and Bruno E. Morgado and Viviane Peixoto and Josselin Desmars and Felipe Braga-Ribas and Altair Gomes-Junior and Bruno Sicardy and Jose Ortiz and R. Vieira-Martins and C. Pereira and Luana Liberato and Marcelo Assafin and Yucel Kilic and Rodrigo Boufleur and Flavia Rommel and Gustavo Benedetti-Rossi and Martin Banda-Huarca and Franck Marchis and Paolo Tanga and Benoit Blanc and Erick Bondoux and Alexandra Burnett and S. Calavia-Belloc and O. Canales-Moreno and Norman Carlson and Matthieu Conjat and Tony George and R. Gonçalves and R. Iglesias-Marzoa and Grego Krannich and D. Lafuente-Aznar and Paul Maley and Jordi Marco and C. Schnabel and Delwin Shand and Kevin Wagner},
journal= {arXiv preprint arXiv:2507.19638},
year = {2025}
}
Comments
Manuscript accepted for publication in The Astronomical Journal. 14 pages, 8 figures, 5 tables