5474 Gingasen
| Discovery | |
|---|---|
| Discovered by |
T. Fujii K. Watanabe |
| Discovery site | Kitami Obs. |
| Discovery date | 3 December 1988 |
| Designations | |
| MPC designation | (5474) Gingasen |
|
Named after
|
Gingasen (railroad track, Japan) |
|
1988 XE1 · 1955 YK 1971 BO2 |
|
| main-belt · Vestian | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 45.38 yr (16,574 days) |
| Aphelion | 2.5439 AU |
| Perihelion | 2.2225 AU |
| 2.3832 AU | |
| Eccentricity | 0.0674 |
| 3.68 yr (1,344 days) | |
| 165.89° | |
| 0° 16m 4.44s / day | |
| Inclination | 6.1444° |
| 246.98° | |
| 256.30° | |
| Known satellites | 1 (suspected) (orbital period of 3.1095 h) |
| Physical characteristics | |
| Dimensions |
5.05±0.48 km 6.68 km (derived) |
|
2.91 h (superseded) 3.6242±0.0003 h 3.6272±0.0015 h 3.628±0.005 h |
|
| 0.20 (assumed) 0.480±0.109 |
|
| S | |
| 12.70±0.2 (R) · 12.79±0.10 (R) · 12.886±0.002 (R) · 12.90 · 13.1 · 13.14±0.35 · 13.28±0.112 | |
5474 Gingasen, provisional designation 1988 XE1, is a Vestian asteroid and suspected binary system from the inner regions of the asteroid belt, approximately 6 kilometers in diameter.
It was discovered on 3 December 1988, by Japanese amateur astronomers Tetsuya Fujii and Kazuro Watanabe at Kitami Observatory, Japan. It is named for the "Gingasen" railroad track in Japan.
Gingasen is a stony S-type asteroid and member of the Vesta family. It orbits the Sun at a distance of 2.2–2.5 AU once every 3 years and 8 months (1,344 days). Its orbit has an eccentricity of 0.07 and an inclination of 6° with respect to the ecliptic. First identified as 1955 YK at Alma-Ata (Tian Shan Observatory) in Kazakhstan, Gingasen's first used observation was taken in 1971, when it was identified as 1971 BO2 at Cerro El Roble Station in Chile, extending the body's observation arc by 17 years prior to its official discovery observation.
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Gingasen measures 5.05 kilometers in diameter, and its surface has a high albedo of 0.480, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 6.68 kilometers based on an absolute magnitude of 13.28.
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