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- Title
Photometric observations of the potentially hazardous asteroid (99942) Apophis from Kawabe Cosmic Park.
- Authors
Yoshida, Fumi; Ishimaru, Ryo; Okudaira, Osamu; Ishibashi, Ko; Hong, Peng K; Matsui, Takafumi; Kim, Myung-Jin
- Abstract
Asteroid (99942) Apophis is a potentially hazardous asteroid. The Korea Astronomy and Space Science Institute (KASI) recently proposed a rendezvous mission with Apophis, with a planned asteroid observation campaign to help determine the mission strategy in advance. In this study, we performed multicolor photometric observations of Apophis using the 1.0 m telescope at Kawabe Cosmic Park on 2021 March 10. The visible colors (g ′, r ′, and i ′) of Apophis were obtained. The average colors of Apophis during our observations were as follows: g ′ − r ′ = 0.618 ± 0.021 and r ′ − i ′ = 0.180 ± 0.021. No significant color variation was observed in r ′ − i ′, but a slight variation may have occurred in g ′ − r ′ during the observation period of 4.63 hr. The obtained colors appeared to match those of an Sq-class asteroid, which is the asteroid type previously determined for Apophis by Binzel et al. (2009 , Icarus, 200, 480) using the visible to near-infrared (0.55–2.45 μm) reflectance spectrum.
- Subjects
SPACE sciences; ASTEROID detection; SPACE astronomy; ASTEROIDS
- Publication
Publications of the Astronomical Society of Japan, 2021, Vol 73, Issue 4, pL13
- ISSN
0004-6264
- Publication type
Article
- DOI
10.1093/pasj/psab072