2478 Tokai
| Discovery | |
|---|---|
| Discovered by | T. Furuta |
| Discovery site | Tōkai Obs. (879) |
| Discovery date | 4 May 1981 |
| Designations | |
| (2478) Tokai | |
| Pronunciation | /ˈtoʊkaɪ/ Japanese: [toːkai] |
Named after | Tōkai (Japanese city) |
| 1981 JC · 1931 HH 1932 SE · 1934 ED 1939 VH · 1951 JP 1955 OE · 1955 QV 1957 BD · 1972 RS 1978 NU2 · 1979 XR 1981 JT | |
| main-belt · Flora | |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.68 yr (30,929 days) |
| Aphelion | 2.3781 AU |
| Perihelion | 2.0740 AU |
| 2.2261 AU | |
| Eccentricity | 0.0683 |
| 3.32 yr (1,213 days) | |
| 103.28° | |
| 0° 17m 48.48s / day | |
| Inclination | 4.1389° |
| 228.80° | |
| 233.85° | |
| Known satellites | 1 |
| Physical characteristics | |
| Dimensions | 9.238±0.112 km 9.36±1.51 km 9.71±0.49 km 9.982±0.031 km 10.087 km 10.09 km (taken) |
| 25.88±0.01 h 25.885±0.007 h 25.8913 h 25.97±0.11 h | |
| 0.144±0.015 0.1957 0.2084±0.0371 0.252±0.045 0.33±0.20 | |
| SMASS = S · S | |
| 11.88±0.03 (R) · 12.00 · 12.15±0.04 · 12.2 · 12.33 · 12.37±0.058 · 12.80 | |
2478 Tokai, provisionally designated 1981 JC, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 4 May 1981, by Japanese astronomer Toshimasa Furuta at Tōkai Observatory (879), Japan. The asteroid was named after the city of Tōkai.