2340 Hathor
| Discovery | |
|---|---|
| Discovered by | C. Kowal |
| Discovery site | Palomar Obs. |
| Discovery date | 22 October 1976 |
| Designations | |
| MPC designation | 2340 Hathor |
| Pronunciation | ˈhæθ ɔr, -ər (HATH-er) |
|
Named after
|
Hathor (Egyptian deity) |
| 1976 UA | |
| Aten · NEO · PHA | |
| Orbital characteristics | |
| Epoch 11 August 2004 (JD 2453228.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 38.00 yr (13,878 days) |
| Aphelion | 1.2235 AU |
| Perihelion | 0.4642 AU |
| 0.8438 AU | |
| Eccentricity | 0.4499 |
| 0.78 yr (283 days) | |
| 42.104° | |
| 1° 16m 17.4s / day | |
| Inclination | 5.8546° |
| 211.54° | |
| 39.926° | |
| Earth MOID | 0.0069 AU |
| Physical characteristics | |
| Dimensions |
0.210±0.030 km 0.3 km (dated) |
| 3.350±0.002 h | |
| 0.15 (dated) 0.3331 (derived) |
|
|
B–V = 0.770 U–B = 0.500 CSU (Tholen) Sq (SMASS) · S |
|
| 20.2 | |
2340 Hathor (HATH-awr; HATH-er), provisional designation 1976 UA, is an eccentric stony asteroid, classified as near-Earth object and potentially hazardous asteroid. It belongs to the Aten group of asteroids and measures approximately 210 meters in diameter. It was discovered on 22 October 1976, by American astronomer Charles Kowal at Palomar Observatory, California, United States. It was independently discovered by Eleanor Helin and is named for the ancient Egyptian deity Hathor.
Being a member of the Aten asteroids, Hathor orbits the Sun at a distance of 0.5–1.2 AU once every 9 months (283 days). Its orbit has an eccentricity of 0.45 and an inclination of 6° with respect to the ecliptic. Its observation arc begins 3 days after its official discovery at Palomar, with no precoveries taken and no prior identifications made. Its orbital solution includes non-gravitational forces.
When it was discovered in 1976, Hathor had one of its closest approaches to Earth at 0.007752 AU (1,160,000 km). On 21 October 2014, when it passed Earth at 0.048 AU, or 18.8 lunar distances, it was observed 22 times by the Goldstone Deep Space Network using radar astronomy over a period of 21 days from 10 to 31 October.Hathor will pass Earth again at 0.00658 AU (984,000 km) on 21 October 2069.
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