Английская Википедия:2478 Tokai
Шаблон:Use dmy dates Шаблон:Infobox planet
2478 Tokai, provisionally designated Шаблон:Mp, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 May 1981, by Japanese astronomer Toshimasa Furuta at Tōkai Observatory (Шаблон:Small), Japan.[1] The asteroid was named after the city of Tōkai.[2]
Orbit and classification
Tokai is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 2.1–2.4 AU once every 3 years and 4 months (1,213 days). Its orbit has an eccentricity of 0.07 and an inclination of 4° with respect to the ecliptic.[3]
Physical characteristics
In the SMASS classification, Tokai is a common S-type asteroid.[3]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Tokai measures between 9.238 and 9.982 kilometers in diameter and its surface has an albedo between 0.144 and 0.33.[4][5][6][7] The Collaborative Asteroid Lightcurve Link agrees with Petr Pravec's revised WISE-data, that is, an albedo of 0.1957 and a diameter of 10.09 kilometers with an absolute magnitude of 12.37.[8]
Satellite
Photometric observations in 2007, revealed a minor-planet moon in orbit of Tokai. It measures approximately 6 kilometers in diameter (lower limit diameter ratio of 0.72) and has an orbital period of 25.88 hours.[8][9][10]
Naming
This minor planet was named after the city of Tōkai, Japan, where the discoverer lives and the discovering observatory is located.[2] The approved naming citation was published by the Minor Planet Center on 8 February 1982 (Шаблон:Small).[11]
Notes
References
External links
- Lightcurve plot of 2478 Tokai, Palmer Divide Observatory, B. D. Warner (2007)
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Flora asteroids
- Discoveries by Toshimasa Furuta
- Named minor planets
- Binary asteroids
- S-type asteroids (SMASS)
- Astronomical objects discovered in 1981
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