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Stellar Occultations by Large TNOs on 2012: The February 3rd by (208996) 2003 AZ84, and the February 17th by (50000) Quaoar
Braga Ribas, Felipe; Sicardy, B.; Ortiz, J. L. et al.
2012In AAS/Division for Planetary Sciences Meeting Abstracts
 

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Abstract :
[en] On February 2012, two stellar occultation's by large Trans-neptunian Objects (TNO's) were observed by our group. On the 3rd, an event by (208996) 2003 AZ84 was recorded from Mont Abu Observatory and IUCAA Girawali Observatory in India and from Weizmann Observatory in Israel. On the 17th, a stellar occultation by (50000) Quaoar was observed from south France and Switzerland. Both occultations are the second observed by our group for each object, and will be used to improve the results obtained on the previous events. The occultation by 2003 AZ84 is the first multi-chord event recorded for this object. From the single chord event on January 8th 2011, Braga-Ribas et al. 2011 obtained a lower limit of 573 +/- 21 km. From the 2012 occultation the longest chord has a size of 662 +/- 50 km. The other chords will permit to determine the size and shape of the TNO, and derive other physical parameters, such as the geometric albedo. The Quaoar occultation was observed from south of France (Observatoire de la Côte d'Azur, TAROT telescope and Valensole) and from Gnosca, Switzerland. Unfortunately, all three sites in France are almost at the same Quaoar's latitude, so in practice, we have two chords that can be used to fit Quaoar's limb. The resulting fit will be compared with the results obtained by Braga-Ribas et al. 2011. Braga-Ribas F., Sicardy B., et al. 2011, EPSC-DPS2011, 1060.Ribas F., Sicardy B., et al. 2011, EPSC-DPS2011, 1060.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Braga Ribas, Felipe;  Observatoire de Paris-Meudon / LESIA, France
Sicardy, B.;  Observatoire de Paris-Meudon / LESIA, France
Ortiz, J. L.;  Instituto de Astrofisica de Andalucia, CSIC, Spain
Duffard, R.;  Instituto de Astrofisica de Andalucia, CSIC, Spain
Camargo, J. I. B.;  Observatorio Nacional / MCTI, Brazil
Lecacheux, J.;  Observatoire de Paris-Meudon / LESIA, France
Colas, F.;  Observatoire de Paris-Meudon / IMCCE, France
Vachier, F.;  Observatoire de Paris-Meudon / IMCCE, France
Tanga, P.;  Observatoire de la Cote d'Azur, France
Sposetti, S.;  Gnosca Observatory, Switzerland
Brosch, N.;  Wise Observatory, Tel Aviv University, Israel
Kaspi, S.;  Wise Observatory, Tel Aviv University, Israel
Manulis, I.;  Weizmann Institute of Science, Israel
Baug, T.;  Physical Research Laboratory, India
Chandrasekhar, T.;  Physical Research Laboratory, India
Ganesh, S.;  Physical Research Laboratory, India
Jain, J.;  Physical Research Laboratory, India
Mohan, V.;  IUCAA Girawali Observatory, India
Sharma, A.;  Nikaya Observatory, India
Garcia-Lozano, R.;  Observatorio de Busot, Spain
Klotz, A.;  Universite de Toulouse, UPS-OMP, IRAP, France
Frappa, E.;  EURASTER, 1bis cours Jovin Bouchard, 42000, France
Jehin, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Assafin, M.;  Observatorio do Valongo / UFRJ, Brazil
Vieira Martins, R.;  Observatorio Nacional / MCTI, Brazil
Behrend, R.;  Observatoire de Geneve, Switzerland
Roques, F.;  Observatoire de Paris-Meudon / LESIA, France
Widemann, T.;  Observatoire de Paris-Meudon / LESIA, France
Morales, N.;  Instituto de Astrofísica de Andalucía, CSIC, Spain
Thirouin, A.;  Instituto de Astrofísica de Andalucía, CSIC, Spain
Mahasena, P.;  Observatorium Bosscha, Institut Teknologi Bandung, Indonesia
Benkhaldoun, Z.;  Oukaimeden Observatory, LPHEA, Cadi Ayyad University, Morocco
Daassou, A.;  Oukaimeden Observatory, LPHEA, Cadi Ayyad University, Morocco
Rinner, C.;  Moroccan Oukaimeden Sky Survey, Morocco
Ofek, E. O.;  Weizmann Institute of Science, Israel)
More authors (25 more) Less
Language :
English
Title :
Stellar Occultations by Large TNOs on 2012: The February 3rd by (208996) 2003 AZ84, and the February 17th by (50000) Quaoar
Publication date :
01 October 2012
Event name :
DPS 44th annual meeting of the Division for Planetary Sciences of the American Astronomical Society
Event place :
Reno, United States
Event date :
du 14 au 19 octobre 2012
Audience :
International
Main work title :
AAS/Division for Planetary Sciences Meeting Abstracts
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