12238 Actor

12238 Actor
Discovery[1]
Discovered byE. W. Elst
G. Pizarro
Discovery siteLa Silla Obs.
Discovery date17 December 1987
Designations
(12238) Actor
Pronunciation/ˈæktɔːr/
Named after
Actor (Greek mythology)[1]
1987 YU1 · 1986 WW8
Jupiter trojan[1][2]
Greek[3] · background[4]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc31.47 yr (11,494 d)
Aphelion5.8135 AU
Perihelion4.5361 AU
5.1748 AU
Eccentricity0.1234
11.77 yr (4,300 d)
245.58°
0° 5m 1.32s / day
Inclination21.091°
227.59°
177.30°
Jupiter MOID0.4056 AU
TJupiter2.8520
Physical characteristics
30.25±4.84 km[5]
36.78 km (calculated)[6]
7.284 h[7]
0.057 (assumed)[6]
0.092±0.017[5]
C (assumed)[6]
10.80[5]
10.9[1][2][6]

12238 Actor /ˈæktɔːr/ is a Jupiter trojan from the Greek camp, approximately 30 kilometers (19 miles) in diameter. It was discovered on 17 December 1987, by astronomers Eric Elst and Guido Pizarro at the La Silla Observatory in northern Chile.[1] The dark Jovian asteroid has a rotation period of 7.3 hours.[6] It was named after Actor, father of the heroes Eurytus and Cteatus from Greek mythology.[1]

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