4263 Abashiri
| Discovery | |
|---|---|
| Discovered by |
M. Yanai K. Watanabe |
| Discovery site | Kitami Obs. |
| Discovery date | 7 September 1989 |
| Designations | |
| MPC designation | 4263 Abashiri |
|
Named after
|
Abashiri (Japanese city) |
|
1989 RL2 · 1935 KE 1952 OS · 1969 TS3 1972 OB · 1978 EK 1981 AT1 · 1982 PF 1988 DK5 |
|
| main-belt · Flora | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 65.76 yr (24,018 days) |
| Aphelion | 2.5446 AU |
| Perihelion | 1.9257 AU |
| 2.2351 AU | |
| Eccentricity | 0.1384 |
| 3.34 yr (1,221 days) | |
| 170.18° | |
| 0° 17m 42s / day | |
| Inclination | 5.8051° |
| 298.08° | |
| 307.63° | |
| Physical characteristics | |
| Dimensions | 7.17 km (derived) 8.98±0.44 km |
|
4.8817±0.0001 h 4.8820±0.0002 h |
|
|
0.200±0.033 0.24 (assumed) |
|
| S | |
| 12.7 · 12.93 · 12.60 · 12.44±0.08 (R) · 12.93±0.094 | |
4263 Abashiri, provisional designation 1989 RL2, is a stony Flora asteroid from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered on 7 September 1989, by Japanese astronomers Masayuki Yanai and Kazuro Watanabe at Kitami Observatory in eastern Hokkaidō, Japan.
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,221 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic. Due to a precovery obtained at Palomar Observatory in 1951, the asteroid's observation arc could be extended by 38 years prior to its discovery.
In 2008 and 2011, two rotational light-curves obtained by Czech astronomer Petr Pravec gave a well-defined rotation period of 4.8820±0.0002 and 4.8817±0.0001 hours with a corresponding brightness variation of 0.15 and 0.11 in magnitude, respectively (U=3/3). According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 9.0 kilometers in diameter and its surface has an albedo of 0.20, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24, derived from the Flora family's largest member and namesake, the asteroid 8 Flora, and calculates a somewhat smaller diameter of 7.2 kilometers.
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