1583 Antilochus

1583 Antilochus /ænˈtɪləkəs/ is a large Jupiter trojan from the Greek camp, approximately 108 kilometers (67 miles) in diameter. It was discovered on 19 September 1950, by Belgian astronomer Sylvain Arend at Uccle Observatory in Belgium, and later named after the hero Antilochus from Greek mythology. The dark D-type asteroid belongs to the 20 largest Jupiter trojans and has a rotation period of 15.9 hours. It forms an asteroid pair with 3801 Thrasymedes.

1583 Antilochus
Discovery
Discovered byS. Arend
Discovery siteUccle Obs.
Discovery date19 September 1950
Designations
MPC designation
(1583) Antilochus
Pronunciation/ænˈtɪləkəs/
Named after
Antilochus
(Greek mythology)
Alternative designations
1950 SA · 1926 VF
1974 WH1
Minor planet category
Jupiter trojan
Greek · background
AdjectivesAntilochian
Orbital characteristics
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc91.53 yr (33,430 d)
Aphelion5.3959 AU
Perihelion4.8644 AU
Semi-major axis
5.1301 AU
Eccentricity0.0518
Orbital period (sidereal)
11.62 yr (4,244 d)
Mean anomaly
256.95°
Mean motion
0° 5m 5.28s / day
Inclination28.512°
Longitude of ascending node
221.38°
187.27°
Jupiter MOID0.0264 AU
TJupiter2.7570
Physical characteristics
Mean diameter
101.62±3.2 km
108.84±0.54 km
111.69±3.86 km
Synodic rotation period
15.889±0.005 h
0.053±0.004
0.054±0.004
0.0633±0.004
D (Tholen)
D0 (Barucci)
D (Tedesco)
U–B = 0.253±038
B–V = 0.752±020
V–I = 0.950±0.043
BR = 1.220±0.109
8.58
8.59±0.06
8.60
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