Back (9942) 1989 TM1 Arabic 942) 1989 تم1 (كويكب) ARZ (9942) 1989 TM1 CE (9942) 1989 TM1 Esperanto (9942) 1989 TM1 French (9942) 1989 TM1 Hungarian (9942) 1989 TM1 Armenian (9942) 1989 TM1 Malagasy 1989 TM1 Swedish (9942) 1989 TM1 Tatar
| Discovery[1] | |
|---|---|
| Discovered by | T. Hioki N. Kawasato |
| Discovery site | Okutama Obs. |
| Discovery date | 8 October 1989 |
| Designations | |
| (9942) 1989 TM1 | |
| 1989 TM1 | |
| main-belt[1][2] · (middle)[3] background | |
| Orbital characteristics[2] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 26.64 yr (9,732 days) |
| Aphelion | 3.0287 AU |
| Perihelion | 2.1619 AU |
| 2.5953 AU | |
| Eccentricity | 0.1670 |
| 4.18 yr (1,527 days) | |
| 217.94° | |
| 0° 14m 8.52s / day | |
| Inclination | 9.9393° |
| 21.747° | |
| 38.492° | |
| Physical characteristics | |
| 4.12±0.45 km[4] 4.73 km (calculated)[3] | |
| 3.0706±0.0004 h[5] | |
| 0.20 (assumed)[3] 0.454±0.106[4] | |
| S (assumed)[3] | |
| 13.40[4] · 13.541[5] 13.6[2] · 13.99[3] | |
(9942) 1989 TM1 (provisional designation 1989 TM1) is a background asteroid from the central region of the asteroid belt, approximately 4.5 kilometers (2.8 miles) in diameter. It was discovered on 8 October 1989, by Japanese astronomers Nobuhiro Kawasato and Tsutomu Hioki at the Okutama Observatory (877) in Japan.[1] The asteroid has a tentative rotation period of 3.1 hours.[3]
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