Asteroid Lightcurves from the MOA-II Survey: a pilot study

Author:

Cordwell A J1ORCID,Rattenbury N J1,Bannister M T2,Cowan P3,Abe Fumio4,Barry Richard5,Bennett David P5,Bhattacharya Aparna56,Bond Ian A3,Fujii Hirosane7,Fukui Akihiko89,Itow Yoshitaka4,Silva Stela Ishitani510ORCID,Hirao Yuki7,Kirikawa Rintaro7,Kondo Iona7,Koshimoto Naoki56,Matsubara Yutaka11,Matsumoto Sho7,Muraki Yasushi11ORCID,Miyazaki Shota7,Okamura Arisa7,Ranc Clément12,Satoh Yuki7,Sumi Takahiro7,Suzuki Daisuke7,Tristram Paul J13,Toda Taiga7,Yama Hibiki7,Yonehara Atsunori14,

Affiliation:

1. Department of Physics, University of Auckland , Auckland 1010, New Zealand

2. School of Physical and Chemical Sciences - Te Kura Matū , University of Canterbury, Private Bag 5900, Christchurch 9150, New Zealand

3. School of Natural and Computational Sciences, Massey University , Auckland 0856, New Zealand

4. Institute for Space-Earth Environmental Research, Nagoya University , Nagoya 464-8601, Japan

5. Code 667, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA

6. Department of Astronomy, University of Maryland , College Park, MD 20742, USA

7. Department of Earth and Space Science, Graduate School of Science, Osaka University , Toyonaka, Osaka 560-0043, Japan

8. Instituto de Astrofísica de Canarias , Vía Láctea s/n, E-49306 La Laguna, Tenerife, Spain

9. Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

10. Department of Physics, The Catholic University of America , Washington, DC 20064, USA

11. Department of Physics, University of Warwick , Gibbet Hill Road, Coventry, CV5 8AL, UK

12. Sorbonne Université, CNRS, UMR 7095, Institut d’Astrophysique de Paris , 98 bis bd Arago, F-75014 Paris, France

13. University of Canterbury Mt. John Observatory , PO Box 56, Lake Tekapo 8770, New Zealand

14. Department of Physics, Faculty of Science, Kyoto Sangyo University , 603-8555 Kyoto, Japan

Abstract

ABSTRACT The Microlensing Observations in Astrophysics (MOA-II) survey has performed high cadence, wide field observations of the Galactic Bulge from New Zealand since 2005. The hourly cadence of the survey during eight months of the year, across nearly 50 deg2 of sky, provides an opportunity to sample asteroid lightcurves in the broad MOA-R filter. We perform photometry of a subset of bright asteroids numbered observed by the survey. We obtain 26 asteroid rotation periods, including for two asteroids where no prior data exist, and present evidence for the possible non-principal axis rotation of (2011) Veteraniya. This archival search could be extended to several thousands of asteroids brighter than 22nd magnitude.

Funder

KAKENHI

Agence Nationale de la Recherche

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Reference48 articles.

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