Back 4786 Tatianina (كويكب) ARZ (4786) Татьянина CE 4786 Tatianina Esperanto (4786) Tatianina Spanish سیارک ۴۷۸۶ Persian (4786) Tatianina French 4786 Tatianina Hungarian (4786) Տատյանինա Armenian 4786 Tatianina Italian タチアニーナ (小惑星) Japanese
| Discovery [1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 13 August 1985 |
| Designations | |
| (4786) Tatianina | |
Named after | Tatiana Somova [1] (Friend of discoverer) |
| 1985 PE2 · 1948 GA 1970 KF · 1984 EV1 1984 FM1 | |
| main-belt [1][2] · (inner)[3] background [4] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 47.10 yr (17,202 d) |
| Aphelion | 2.8145 AU |
| Perihelion | 1.9011 AU |
| 2.3578 AU | |
| Eccentricity | 0.1937 |
| 3.62 yr (1,322 d) | |
| 83.900° | |
| 0° 16m 19.92s / day | |
| Inclination | 7.2560° |
| 115.77° | |
| 118.27° | |
| Known satellites | 1 (D: 0.61 km P: 21.67 h)[3][5][6][a] |
| Physical characteristics | |
| 3.282±0.197 km[7][8] 3.475 km[9] 3.48 km (taken)[3] | |
| 2.9227±0.0001 h[a] 2.9227 h[6] 2.9228±0.0003 h[10] | |
| 0.4763[9] 0.5136±0.1593[8] 0.514±0.159[7] | |
| SMASS = Xc [2] · E [8] | |
| 13.3[2] 13.31±0.1 (R)[a] 13.46±0.20[11] 13.718±0.1[3][9] 13.76[8] | |
4786 Tatianina, provisional designation 1985 PE2, is a bright background asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 3.4 kilometers (2.1 miles) in diameter. It was discovered on 13 August 1985, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] It was named after Tatiana Somova, a friend of the discoverer. The E-/Xc-subtype has a short rotation period of 2.9 hours.[3] Its sub-kilometer minor-planet moon was discovered on 20 March 2006 and announced the following month.[5][6]
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