2478 Tokai
| Discovery [1] | |
|---|---|
| Discovered by | T. Furuta |
| Discovery site | Tokai (879) |
| Discovery date | 4 May 1981 |
| Designations | |
| MPC designation | 2478 Tokai |
Named after | Tokai (city)[2] |
|
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 | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.35 yr (30444 days) |
| Aphelion | 2.3771 AU (355.61 Gm) |
| Perihelion | 2.0741 AU (310.28 Gm) |
| 2.2256 AU (332.95 Gm) | |
| Eccentricity | 0.068082 |
| 3.32 yr (1212.7 d) | |
| 285.51° | |
| 0° 17m 48.66s / day | |
| Inclination | 4.1375° |
| 228.81° | |
| 233.50° | |
| Known satellites | 1[3] |
| Earth MOID | 1.09371 AU (163.617 Gm) |
| Jupiter MOID | 2.71258 AU (405.796 Gm) |
| Jupiter Tisserand parameter | 3.640 |
| Physical characteristics | |
| Dimensions | ~ 7–15 km[4] |
| 25.885 h (1.0785 d) | |
| S (SMASSII) | |
| 12.2 | |
|
| |
2478 Tokai, provisionally designated 1981 JC, is a main-belt asteroid discovered on May 4, 1981 by prolific Japanese astronomer Toshimasa Furuta at Tōkai, Aichi.[1] It is named after the city of its discovery.[2]
Since the albedo of this asteroid is unknown, the size can only be estimated as between about 7–15 kilometers, based on the absolute magnitude (H) of 12.[4]
Satellite
Photometric observations in 2007 revealed a ~7+km satellite (lower limit diameter ratio of 0.72) with an orbital period of 25.88 hours.[3]
References
- 1 2 3 "JPL Small-Body Database Browser: 2478 Tokai (1981 JC)" (2015-09-23 last obs.). Jet Propulsion Laboratory. Retrieved 15 April 2016.
- 1 2 "Dictionary of Minor Planet Names – (2478) Tokai". Springer Berlin Heidelberg. 2007. p. 202. Retrieved 11 October 2015.
- 1 2 "Electronic Telegram No. 824". IAU Central Bureau for Astronomical Telegrams. 2007-01-30. Retrieved 5 July 2011.
- 1 2 "Absolute Magnitude (H)". NASA/JPL Near-Earth Object Program. Archived from the original on 26 October 2009. Retrieved 13 October 2009.
External links
- "2478 Tokai (1981 JC)". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2002478.
- Orbital simulation from JPL (Java) / Ephemeris
- 2478 Tokai at the JPL Small-Body Database
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