2478 Tokai

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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[edit]

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[edit]

  1. ^ a b c "JPL Small-Body Database Browser: 2478 Tokai (1981 JC)" (2015-09-23 last obs.). Jet Propulsion Laboratory. Retrieved 15 April 2016. 
  2. ^ a b "Dictionary of Minor Planet Names – (2478) Tokai". Springer Berlin Heidelberg. 2007. p. 202. Retrieved October 2015. 
  3. ^ a b "Electronic Telegram No. 824". IAU Central Bureau for Astronomical Telegrams. 2007-01-30. Retrieved 2011-07-05. 
  4. ^ a b "Absolute Magnitude (H)". NASA/JPL Near-Earth Object Program. Archived from the original on 26 October 2009. Retrieved 2009-10-13. 

External links[edit]