Discovery date 3 March 1971 Alternative names 1971 EA Orbits Sun Asteroid group Jupiter trojan | MPC designation 1867 Deiphobus Discovered 3 March 1971 Spectral type D-type asteroid | |
Discovered by C. U. Cesco
A. G. Samuel Pronunciation diːˈɪfəbəs (dee-if'-ə-bəs) Named after Deiphobus
(Greek mythology) Discovery site Leoncito Astronomical Complex Discoverers A. G. Samuel, Carlos Ulrrico Cesco Similar Jupiter trojan, Solar System, Sun, 911 Agamemnon, 1865 Cerberus | ||
1867 Deiphobus (DEE-if'-Ə-bəs), provisional designation 1971 EA, is a Jupiter trojan from the Trojan camp, approximately 123 kilometers in diameter. It was discovered on 3 March 1971, by Argentine astronomers Carlos Cesco and A. G. Samuel at the Leoncito Astronomical Complex in Argentina.
The D-type minor planet orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 7 months (4,242 days). Its orbit has an eccentricity of 0.04 and an inclination of 27° with respect to the ecliptic.
Photometric observations of this asteroid during 1994 were used to build a light curve showing a slow rotation period of 58.66 ± 0.18 hours with a brightness variation of 0.27 ± 0.03 magnitude.
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Deiphobus measures between 118.2 and 131.3 kilometers in diameter, and its surface has an albedo between 0.037 and 0.060. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.040, and calculates a diameter of 122.7 kilometers based on an absolute magnitude of 8.68.
It was named after the Trojan warrior, Deiphobus, son of Priamus (also see 108 Hecuba and 884 Priamus). Naming citation was published before November 1977 (M.P.C. 3935).