3564 Talthybius
3564 Talthybius /tælˈθɪbiəs/ is a large Jupiter trojan from the Greek camp, approximately 73 kilometers (45 miles) in diameter. It was discovered on 15 October 1985, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States. The dark D-type asteroid belongs to the 50 largest Jupiter trojans and has a relatively long rotation period of 40.59 hours. It was named after the Greek hero Talthybius, who was a herald during the Trojan War.
| Discovery | |
|---|---|
| Discovered by | E. Bowell |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 15 October 1985 |
| Designations | |
MPC designation | (3564) Talthybius |
| Pronunciation | /tælˈθɪbiəs/ |
Named after | Talthybius (Greek mythology) |
Alternative designations | 1985 TC1 · 1979 HW2 1979 HY1 · 1980 JU |
Minor planet category | Jupiter trojan Greek · background |
| Adjectives | Talthybian |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.46 yr (24,639 d) |
| Aphelion | 5.4098 AU |
| Perihelion | 4.9952 AU |
Semi-major axis | 5.2025 AU |
| Eccentricity | 0.0398 |
Orbital period (sidereal) | 11.87 yr (4,334 d) |
Mean anomaly | 50.621° |
Mean motion | 0° 4m 59.16s / day |
| Inclination | 15.507° |
Longitude of ascending node | 23.776° |
| 204.40° | |
| Jupiter MOID | 0.4228 AU |
| TJupiter | 2.9260 |
| Physical characteristics | |
Mean diameter | 68.53 km (derived) 68.92±3.5 km 73.73±0.58 km 74.11±2.65 km |
Synodic rotation period | 40.40±0.03 h 40.44±0.02 h 40.59±0.13 h |
| 0.062±0.016 0.0654 (derived) 0.081±0.006 0.0934±0.010 | |
| D (Pan-STARRS) D (SDSS-MOC) C (assumed) | |
| 9.00 9.3 9.4 9.45±0.50 | |
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