(10115) 1992 SK
| Discovery [1] | |
|---|---|
| Discovered by | E. F. Helin J. Alu |
| Discovery site | Palomar Obs. |
| Discovery date | 24 September 1992 |
| Designations | |
| MPC designation | (10115) 1992 SK |
| 1992 SK · 1985 SD 1985 TO2 |
|
| Apollo · NEO · PHA | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 60.22 yr (21,996 days) |
| Aphelion | 1.6537 AU |
| Perihelion | 0.8430 AU |
| 1.2483 AU | |
| Eccentricity | 0.3247 |
| 1.39 yr (509 days) | |
| 124.84° | |
| Inclination | 15.321° |
| 8.9261° | |
| 233.62° | |
| Earth MOID | 0.0465 AU |
| Physical characteristics | |
| Dimensions | 0.90±0.20 km[2] 1.000±0.085 km[3] 0.938±0.294 km[4] 1.18 km (calculated)[5] |
| 7.328±0.002 h[lower-alpha 1] 7.31832 h[6] 7.31±0.02 h[7] 7.323±0.005 h[8] 7.319 h[5] |
|
| 0.34±0.25[2] 0.38±0.24[9] 0.2799±0.1397[3] 0.318±0.214[4] 0.20 (assumed)[5] |
|
| SMASS = S[1] S [5] · S/Sq [10] |
|
| 17.0[1][3][4][5] 17.4[lower-alpha 1] |
|
(10115) 1992 SK, is an eccentric stony asteroid, classified as near-Earth object and potentially hazardous asteroid. It belongs to the group of Apollo asteroids and measures approximately 1 kilometer in diameter. It was discovered by American astronomers Eleanor Helin and Jeff T. Alu at the U.S. Palomar Observatory, California, on 24 September 1992.[11]
The S-type asteroid orbits the Sun at a distance of 0.8–1.7 AU once every 17 months (509 days). Its orbit has a high eccentricity of 0.32 and an inclination of 15° with respect to the ecliptic. Its Earth minimum orbit intersection distance is Lua error in Module:Convert at line 1851: attempt to index local 'en_value' (a nil value).. This makes the body a potentially hazardous asteroid, because its MOID is less than 0.05 AU and its diameter is greater than 150 meters.[1] The first precovery was obtained at Palomar Observatory in 1953, extending the asteroid's observation arc by 39 years prior to its discovery.[11]
Several rotational light-curves form photometric observations have been obtained for this body. In 1999, Czech astronomer Petr Pravec constructed a light-curve, that rendered a rotation period of 7.328±0.002 hours and a brightness variation of 0.72 in magnitude (U=n/a).[lower-alpha 1] In March 2006, observations by astronomer David Polishook from the ground-based Wise Observatory, Israel, gave a rotation period of 7.31±0.02 and amplitude of 0.70 mag (U=2),[7] and in November 2011, American astronomer Brian Warner at the Palmer Divide Observatory, Colorado, obtained the first well-defined period of 7.323±0.005 hours with an amplitude of 0.50 mag (U=3).[8]
According to the surveys carried out by NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 1.0 and 0.94 kilometers in diameter and its surface has an albedo of 0.28 ot 0.32, respectively.[3][4] The ExploreNEOs project finds an albedo of 0.34, with an diameter of 0.9 kilometers,[2] and the Collaborative Asteroid Lightcurve Link calculates a diameter of 1.18 kilometers based on an assumed standard albedo for stony asteroids of 0.20.[5]
References
- ↑ 1.0 1.1 1.2 Pravec (1999) web: rotation period 7.328±0.002 hours with a brightness amplitude of 0.72 mag. Two more light-curves rendered similar periods. No quality rating by CALL. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (10115)
- ↑ 1.0 1.1 1.2 1.3 1.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 4.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 11.0 11.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
- space.frieger.com – 3D Model of (10115) 1992 SK
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- (10115) 1992 SK at the JPL Small-Body Database
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