Discovered by Y. Mizuno
T. Furuta MPC designation 4904 Makio Orbital period 1,348 days Orbits Sun Asteroid group Asteroid belt | Discovery date 21 November 1989 Minor planet category main-belt · (inner) Discovered 21 November 1989 Discovery site Kani observatory | |
Named after Makio Akiyama
(astronomer) Alternative names 1989 WZ · 1974 TB
1974 WC · 1980 KF2 Discoverers Toshimasa Furuta, Yoshikane Mizuno People also search for Sun, 3814 Hoshi-no-mura, 5333 Kanaya | ||
4904 Makio, provisional designation 1989 WZ, is a stony asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered by Japanese astronomers Yoshikane Mizuno and Toshimasa Furuta at Kani Observatory () on 21 November 1989.
The S-type asteroid orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,349 days). Its orbit has an eccentricity of 0.13 and an inclination of 10° with respect to the ecliptic. The first observation was taken at Cerro El Roble Observatory in 1974, extending the asteroid's observation arc by 15 years prior to its discovery.
A rotational light-curve for this asteroid was obtained from photometric observations made by Julian Oey at the Australian Kingsgrove Observatory in March 2009. The light-curve gave it a rotation period of 7000783000000000000♠7.830±0.003 hours with a small brightness variation of 0.08 magnitude, indicative of a spheroidal shape (U=2).
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 7.0 kilometers in diameter and its surface has an albedo of 0.33, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.4 kilometers, based on an absolute magnitude of 12.5.
The minor planet was named after Japanese astronomer Makio Akiyama (b. 1950), an observer and discoverer of minor planets himself at the Susono Observatory (886). Naming citation was published on 5 March 1996 (M.P.C. 26763).