2122 Pyatiletka
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2122 Pyatiletka, provisional designation 1971 XB, is a stony asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter.
Quick Facts Discovery, Discovered by ...
Discovery [1] | |
---|---|
Discovered by | T. Smirnova |
Discovery site | Crimean Astrophysical Obs. |
Discovery date | 14 December 1971 |
Designations | |
(2122) Pyatiletka | |
Named after | Pyatiletka (Five-year plans of the USSR)[2] |
1971 XB · 1950 BE1 1950 DX · 1951 KB1 1954 DA · 1961 AL 1969 EV1 | |
main-belt · (inner) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 63.18 yr (23,075 days) |
Aphelion | 2.4729 AU |
Perihelion | 2.3310 AU |
2.4019 AU | |
Eccentricity | 0.0295 |
3.72 yr (1,360 days) | |
197.74° | |
0° 15m 53.28s / day | |
Inclination | 7.8981° |
105.50° | |
236.47° | |
Physical characteristics | |
Dimensions | 10.75 km (calculated)[3] 11.00±0.83 km[4] 11.084±0.101 km[5] 11.554±0.074 km[6] |
8.899±0.0053 h[7] | |
0.1931±0.0198[6] 0.20 (assumed)[3] 0.211±0.033[4] 0.224±0.023[5] | |
S [3] | |
11.759±0.002 (R)[7] · 12.1[1][4][6] · 12.21[3] · 12.40±0.29[8] | |
Close
The asteroid was discovered on 14 December 1971 by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[9] It was named for "pyatiletka", the first Five-Year Plan of the USSR.[2]