Discovered by D. J. Asher MPC designation 9084 Achristou Minor planet category main-belt · Hungaria Absolute magnitude 15.7 Discoverer David J. Asher Asteroid group Asteroid belt | Discovery date 3 February 1995 Alternative names 1995 CS1 · 1980 GV1 Discovered 3 February 1995 Orbits Sun Discovery site Siding Spring Observatory | |
Named after Apostolos Christou
(astronomer) People also search for 9172 Abhramu, Sun, 22403 Manjitludher | ||
9084 Achristou, provisional designation 1995 CS1, is a stony Hungaria asteroid from the innermost regions of the asteroid belt, about 1.9 kilometers in diameter. It was discovered by British astronomer David J. Asher at Siding Spring Observatory in New South Wales, Australia, on 3 February 1995.
The bright E-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.7–2.0 AU once every 2 years and 6 months (926 days). Its orbit has an eccentricity of 0.08 and an inclination of 23° with respect to the ecliptic. The first precovery was taken at Palomar Observatory in 1980, extending the asteroid's observation arc by 15 years prior to its discovery.
In 2013, a photometric light-curve analysis at the U.S. Center for Solar System Studies in California has given a rotation period of 7000884000000000000♠8.84±0.02 hours with a brightness amplitude of 0.09 in magnitude (U=2+). Based on the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 1.9 kilometers in diameter and its surface has an albedo of 0.33, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 and calculates a diameter of 1.8 kilometers.
The minor planet was named after Apostolos Christou (b. 1968), planetary astronomer and programmer at the North Irish Armagh Observatory, after which the minor planet 10502 Armaghobs was named. His field or research include minor planets in co-orbit with Venus, designing near-Earth asteroids missions, the dwarf planet 1 Ceres, meteor impacts on Venus, as well as the irregular satellite families of the outer planets. Naming citation was published on 23 May 2005 (M.P.C. 54173).