 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 | |
| (5222) Ioffe | |
Named after | Abram Ioffe (Soviet physicist)[2] |
| 1980 TL13 · 1978 LP 1989 TG1 | |
| 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 | 3.1728AU |
| Perihelion | 2.3788 AU |
| 2.7758 AU | |
| Eccentricity | 0.1430 |
| 4.62yr (1,689 days) | |
| 172.25° | |
| 0° 12m 47.16s / day | |
| Inclination | 34.539° |
| 220.66° | |
| 331.02° | |
| Physical characteristics | |
| Dimensions | 17.989±0.093 km[5] 21.73 km[6] |
| 19.4h[6] | |
| 0.1031[6] 0.1463±0.012 0.202±0.041[5] | |
| B(SMASSII)[1] | |
| 11.4[1] | |
5222 Ioffe, provisional designation1980 TL13, is a rare-type carbonaceous Palladianasteroid from the central region of theasteroid belt, approximately 18 kilometers in diameter. It was discovered on 11 October 1980, by Soviet astronomerNikolai Chernykh at theCrimean Astrophysical Observatory in Nauchnyj, Crimea.[3] It is the largest of thePalladian asteroids apart fromPallas itself.
Ioffe is a member of thePallas family (801), a small, carbonaceousasteroid family in thecentral main-belt.[4][7]: 23
It orbits the Sun at a distance of 2.4–3.2 AU once every 4 years and 7 months (1,689 days). Its orbit has aneccentricity of 0.14 and aninclination of 35° with respect to theecliptic.[1] A firstprecovery was taken atPalomar Observatory in 1952, extending the asteroid'sobservation arc by 28 years prior to its official discovery observation at Nauchnyj.[3]
In theSMASS classificationIoffe is a carbonaceousB-type asteroid, in line with the overallspectral type of the Palladian asteroids.[1][7]: 23
Photometric observations of this asteroid collected during 2006 show arotation period of 19.4 ± 0.2 hours with a brightness variation of 0.27 ± 0.03magnitude.[8]
Thisminor planet was named in memory of Soviet physicistAbram Ioffe (1880–1960), an expert in electromagnetism, radiology, crystals, high-impact physics, thermoelectricity and photoelectricity. Ioffe was a pioneer in the investigation of semiconductors. Proposed by the Institute of Theoretical Astronomy, naming citation was published on 5 March 1996 (M.P.C. 26763).[2][9]
