Global Information5222 Ioffe information
 Rotating frame animation in reference to Jupiter. Each frame 81 years. | |
| Discovery [1] | |
|---|---|
| Discovered by | N. S. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 11 October 1980 |
| Designations | |
MPC designation | (5222) Ioffe |
Named after | Abram Ioffe (Soviet physicist)[2] |
Alternative designations | 1980 TL13 · 1978 LP 1989 TG1 |
Minor planet category | main-belt [1][3] · (middle) Pallas [4] |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 64.08 yr (23,405 days) |
| Aphelion | 3.1728 AU |
| Perihelion | 2.3788 AU |
Semi-major axis | 2.7758 AU |
| Eccentricity | 0.1430 |
Orbital period (sidereal) | 4.62 yr (1,689 days) |
Mean anomaly | 172.25° |
Mean motion | 0° 12m 47.16s / day |
| Inclination | 34.539° |
Longitude of ascending node | 220.66° |
Argument of perihelion | 331.02° |
| Physical characteristics | |
| Dimensions | 17.989±0.093 km[5] 21.73 km[6] |
Synodic rotation period | 19.4 h[6] |
Geometric albedo | 0.1031[6] 0.1463±0.012 0.202±0.041[5] |
Spectral type | B (SMASSII)[1] |
Absolute magnitude (H) | 11.4[1] |
5222 Ioffe, provisional designation 1980 TL13, is a rare-type carbonaceous Palladian asteroid from the central region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 11 October 1980, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, Crimea.[3] It is the largest of the Palladian asteroids apart from Pallas itself.
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