| Discovered by S. J. Bus MPC designation (5476) 1989 TO11 Observation arc 63.39 yr (23,153 days) Absolute magnitude 10.5 Discoverer Schelte J. Bus | Discovery date 2 October 1989 Alternative names 1989 TO11 · 1990 UW13 Discovered 2 October 1989 Orbits Sun Asteroid group Jupiter trojan | |
| Minor planet category Jupiter trojan
(Trojan camp) Discovery site Cerro Tololo Inter-American Observatory | ||
(5476) 1989 TO11 is a carbonaceous Jupiter trojan from the Trojan camp, approximately 40 kilometers in diameter. It was discovered on 2 October 1989, by American astronomer Schelte Bus at the Cerro Tololo Inter-American Observatory in Chile.
The C-type Jovian asteroid orbits the Sun at a distance of 4.7–5.5 AU once every 11 years and 7 months (4,218 days). Its orbit has an eccentricity of 0.07 and an inclination of 14° with respect to the ecliptic. The first precovery was taken at Palomar Observatory in 1952, extending the asteroid's observation arc by 37 years prior to its discovery.
Photometric observations of this asteroid during 1994 were used to build a light curve showing a rotation period of 5.780 ± 0.001 hours with a brightness variation of 0.30 ± 0.01 magnitude.
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 35.1 kilometers in diameter and its surface has an albedo of 0.099, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 42.2 kilometers.