Back 21088 Chelyabinsk (كويكب) ARZ 21088 Chelyabinsk Esperanto (21088) Tcheliabinsk French 21088 Chelyabinsk Hungarian 21088 Chelyabinsk ID 21088 Chelyabinsk Italian 21088 Chelyabinsk MIN 21088 Chelyabinsk Portuguese (21088) Челябинск Russian 21088 Chelyabinsk Sundanese
| Discovery [1] | |
|---|---|
| Discovered by | E. W. Elst |
| Discovery site | La Silla Obs. |
| Discovery date | 30 January 1992 |
| Designations | |
| (21088) Chelyabinsk | |
Named after | Chelyabinsk [2] (city and meteor) |
| 1992 BL2 | |
| NEO · Amor [1][2] Mars-crosser | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 27.41 yr (10,012 days) |
| Aphelion | 2.1135 AU |
| Perihelion | 1.2996 AU |
| 1.7065 AU | |
| Eccentricity | 0.2384 |
| 2.23 yr (814 days) | |
| 318.92° | |
| 0° 26m 31.56s / day | |
| Inclination | 38.455° |
| 297.85° | |
| 27.133° | |
| Earth MOID | 0.3083 AU · 120.1 LD |
| Physical characteristics | |
| Dimensions | 2.79±0.10 km[3] 3.46±0.25 km[4] 4.23 km (taken)[5] 4.231±0.113 km[6][7] 4.232 km[8] |
| 22.426±0.02 h[a][b] 22.49 h[a] | |
| 0.1794[8] 0.206[6] 0.257±0.038[4] 0.26±0.32[9] 0.37±0.06[3] | |
| Q [10] · L [11] · S [5] B–V = 0.855±0.073[12] V–R = 0.464±0.015[12] V–I = 0.910±0.032[12] | |
| 13.86±0.14 (R)[a] · 14.00[11] · 14.2[6] · 14.29±0.24[13] · 14.3[1] · 14.35±0.149[5][8] · 14.40[4] | |
21088 Chelyabinsk (provisional designation 1992 BL2) is a stony asteroid and near-Earth object of the Amor group, approximately 4 kilometers in diameter. It was discovered on 30 January 1992, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The asteroid was named after the Russian city of Chelyabinsk and for its spectacular Chelyabinsk meteor event in 2013.[2] It is not related to the Chelyabinsk impactor.
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