Discovered by T. Urata MPC designation 7526 Ohtsuka Discovered 2 January 1993 Orbits Sun Discovery site Nihondaira Observatory | Discovery date 2 January 1993 Minor planet category main-belt · (inner) Absolute magnitude 13.7 Discoverer Takeshi Urata Asteroid group Asteroid belt | |
Named after Katsuhito Ohtsuka
(astronomer, curator) Alternative names 1993 AA · 1953 XV
1980 TD13 · 1980 VU3
1984 YK2 People also search for Sun, 3686 Antoku, 4375 Kiyomori, 4402 Tsunemori | ||
7526 Ohtsuka, provisional designation 1993 AA, is a stony asteroid from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered by Japanese astronomer Takeshi Urata at Nihondaira Observatory Oohira Station, Japan, on 2 January 1993.
The S-type asteroid orbits the Sun at a distance of 1.8–3.1 AU once every 3 years and 10 months (1,414 days). Its orbit shows an eccentricity of 0.27 and an inclination of 4 degrees from the plane of the ecliptic. A photometric light-curve analysis in 2007 rendered a rotation period of 7000710900000000000♠7.109±0.001 hours with a brightness amplitude of 0.16 in magnitude (U=3-).
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid has an albedo in the range of 0.06 to 0.11 with a diameter between 6.6 and 9.8 kilometers. The Collaborative Asteroid Lightcurve Link (CALL) assumes an albedo of 0.20 and calculates and much smaller diameter of 4.7 kilometers.
The minor planet was named after Japanese astronomer Katsuhito Ohtsuka (b. 1959), also curator of the Tokyo Meteor Network and its meteorite collection. Ohtsuka studies the dynamics of small Solar System bodies, in particular 3200 Phaethon and 96P/Machholz with their complex members. A dynamical relationship between Phaethon and (155140) 2005 UD was discovered by him in 2005.