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.
Discovery | |
---|---|
Discovered by | S. Arend |
Discovery site | Uccle Obs. |
Discovery date | 19 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 |
Adjectives | Antilochian |
Orbital characteristics | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 91.53 yr (33,430 d) |
Aphelion | 5.3959 AU |
Perihelion | 4.8644 AU |
Semi-major axis | 5.1301 AU |
Eccentricity | 0.0518 |
Orbital period (sidereal) | 11.62 yr (4,244 d) |
Mean anomaly | 256.95° |
Mean motion | 0° 5m 5.28s / day |
Inclination | 28.512° |
Longitude of ascending node | 221.38° |
187.27° | |
Jupiter MOID | 0.0264 AU |
TJupiter | 2.7570 |
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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