4035 Thestor
4035 Thestor, provisional designation: 1986 WD, is a large Jupiter trojan from the Greek camp, approximately 68 kilometers (42 miles) in diameter. It was discovered on 22 November 1986, by Japanese astronomers Kenzo Suzuki and Takeshi Urata at the Toyota Observatory (881) in Toyota, Japan. The assumed C-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 13.5 hours. Of more than half a million numbered minor planets, it has been the second-lowest numbered body without a name, until May 2021, when it was named after Thestor, a grandson of Apollo from Greek mythology.
| Discovery | |
|---|---|
| Discovered by | K. Suzuki T. Urata |
| Discovery site | Toyota Obs. |
| Discovery date | 22 November 1986 |
| Designations | |
MPC designation | (4035) Thestor |
Named after | Thestor (Greek mythology) |
Alternative designations | 1986 WD · 1973 SR4 1973 UF6 |
Minor planet category | Jupiter trojan Greek · background |
| Adjectives | Thestorian |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 44.64 yr (16,306 d) |
| Aphelion | 5.5799 AU |
| Perihelion | 4.9899 AU |
Semi-major axis | 5.2849 AU |
| Eccentricity | 0.0558 |
Orbital period (sidereal) | 12.15 yr (4,438 d) |
Mean anomaly | 213.24° |
Mean motion | 0° 4m 51.96s / day |
| Inclination | 12.130° |
Longitude of ascending node | 233.73° |
| 197.56° | |
| Jupiter MOID | 0.0243 AU |
| TJupiter | 2.9520 |
| Physical characteristics | |
Mean diameter | 66.99±4.45 km 68.23 km (derived) 68.46±5.4 km 68.73±1.24 km |
Synodic rotation period | 13.467±0.08 h 13.475±0.156 h 13.49±0.20 h 13.52±0.08 h |
| 0.054±0.008 0.0548 (derived) 0.0718±0.013 0.076±0.010 | |
| C (assumed) V–I = 0.970±0.031 | |
| 9.30 9.6 9.82±0.46 | |
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