16525 Shumarinaiko
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16525 Shumarinaiko (provisional designation 1991 CU2) is a stony Nysian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 14 February 1991, by Japanese astronomers Kin Endate and Kazuro Watanabe at the Kitami Observatory on the island of Hokkaidō in northern Japan.[12] The asteroid was named after the Japanese Lake Shumarinai.[2] Its sub-kilometer sized minor-planet moon was discovered in 2013.
Quick Facts Discovery, Discovered by ...
Discovery[1] | |
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Discovered by | K. Endate K. Watanabe |
Discovery site | Kitami Obs. |
Discovery date | 14 February 1991 |
Designations | |
(16525) Shumarinaiko | |
Named after | Lake Shumarinai[2] (Japanese lake) |
1991 CU2 · 1996 TE51 | |
main-belt · (inner)[3] Nysa[4] | |
Orbital characteristics[1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 67.29 yr (24,578 days) |
Aphelion | 2.7341 AU |
Perihelion | 2.0648 AU |
2.3995 AU | |
Eccentricity | 0.1395 |
3.72 yr (1,358 days) | |
30.750° | |
0° 15m 54.72s / day | |
Inclination | 2.4279° |
7.6547° | |
180.19° | |
Known satellites | 1 (D: 0.83 km; P: 14.409 h)[5][6][lower-alpha 1] |
Physical characteristics | |
Dimensions | 5.253±0.146 km[7][8] 5.66 km (calculated)[3] |
2.5932±0.0003 h[6] 2.6425±0.0006 h (poor)[9] 8.8±0.3 h (poor)[10] | |
0.20 (assumed)[3] 0.306±0.033[7][8] | |
S (assumed)[3] | |
13.3[8] · 13.6[1][3] · 14.37±0.56[11] | |
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