| Discovery [1] | |
|---|---|
| Discovered by | Harvard College Obs. |
| Discovery site | Oak Ridge Obs. |
| Discovery date | 1 April 1981 |
| Designations | |
| (4760) Jia-xiang | |
Named after | Zhang Jiaxiang [1] (Chinese astronomer) |
| 1981 GN1 ·1981 GP1 1982 SE5 | |
| main-belt [1] [2] ·(inner) [3] background [4] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.47 yr (22,817 d) |
| Aphelion | 2.6236 AU |
| Perihelion | 2.0279 AU |
| 2.3258 AU | |
| Eccentricity | 0.1281 |
| 3.55 yr (1,296 d) | |
| 37.063° | |
| 0° 16m 40.44s / day | |
| Inclination | 9.8513° |
| 177.82° | |
| 130.44° | |
| Physical characteristics | |
| 4.71 km (calculated) [3] 4.79±1.41 km [5] 5.137±0.036 km [6] [7] 5.16±1.28 km [8] | |
| 14.96±0.0006 h [a] [b] 14.9601 h [a] [b] | |
| 0.13±0.06 [8] 0.20 (assumed) [3] 0.21±0.15 [5] 0.227±0.042 [6] 0.2275±0.0418 [7] | |
| S (assumed) [3] | |
| 13.56±0.40 [9] ·13.7 [7] ·13.90 [5] ·14.0 [2] [3] ·14.29 [8] | |
4760 Jia-xiang, provisional designation 1981 GN1, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 1 April 1981, by astronomers at Harvard University's Oak Ridge Observatory in Massachusetts, United States. [1] The presumed stony S-type asteroid was named after Chinese astronomer Zhang Jiaxiang. It has a rotation period of 14.96 hours. [a] [b]
Jia-xiang is a non-family asteroid from the main belt's background population. [4] It orbits the Sun in the inner main-belt at a distance of 2.0–2.6 AU once every 3 years and 7 months (1,296 days; semi-major axis of 2.33 AU). Its orbit has an eccentricity of 0.13 and an inclination of 10° with respect to the ecliptic. [2] The body's observation arc begins with a precovery taken at Palomar Observatory in January 1955, or 26 years prior to its official discovery observation at Oak Ridge. [1]
In 2017, two rotational lightcurves of Jia-xiang were obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory. Lightcurve analysis gave a rotation period of 14.96 and 14.9601 hours with a brightness amplitude of 0.55 and 0.63 magnitude, respectively ( U=3/3 ). [a] [b]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Jia-xiang measures between 4.79 and 5.16 kilometers in diameter and its surface has an albedo between 0.13 and 0.2275. [5] [6] [7] [8]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 4.71 kilometers based on an absolute magnitude of 14.0. [3]
This minor planet was named after Chinese astronomer Zhang Jiaxiang (born 1932). [1] The official naming citation was published by the Minor Planet Center on 21 November 1991 ( M.P.C. 19339). [10]
