(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° | |
0° 42m 23.76s / day | |
Inclination | 15.321° |
8.9261° | |
233.62° | |
Earth MOID | 0.0465 AU |
Physical characteristics | |
Dimensions |
±0.20 km 0.90[2] ±0.085 km 1.000[3] ±0.294 km 0.938[4] 1.18 km (calculated)[5] |
±0.002 7.328h[lower-alpha 1] 32 h 7.318[6] ±0.02 h 7.31[7] ±0.005 h 7.323[8] 7.319 h[5] | |
±0.25 0.34[2] ±0.24 0.38[9] ±0.1397 0.2799[3] ±0.214 0.318[4] 0.20 (assumed)[5] | |
SMASS = S[1] S [5] · S/Sq [10] | |
17.0[1][3][4][5] 17.4[lower-alpha 1] | |
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(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 0.0465 AU (6,960,000 km). 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 ±0.002 hours and a brightness variation of 0.72 in 7.328magnitude (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 ±0.02 and amplitude of 0.70 mag ( 7.31U=2),[7] and in November 2011, American astronomer Brian Warner at the Palmer Divide Observatory, Colorado, obtained the first well-defined period of ±0.005 hours with an amplitude of 0.50 mag ( 7.323U=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 2 3 Pravec (1999) web: rotation period ±0.002 hours with a brightness amplitude of 7.328 mag. Two more light-curves rendered similar periods. No quality rating by CALL. Summary figures at 0.72Collaborative Asteroid Lightcurve Link (CALL) for (10115)
- 1 2 3 4 5 "JPL Small-Body Database Browser: 10115 (1992 SK)" (2014-01-01 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
- 1 2 3 Mueller, Michael; Delbo', M.; Hora, J. L.; Trilling, D. E.; Bhattacharya, B.; Bottke, W. F.; et al. (April 2011). "ExploreNEOs. III. Physical Characterization of 65 Potential Spacecraft Target Asteroids". The Astronomical Journal 141 (4): 9. Bibcode:2011AJ....141..109M. doi:10.1088/0004-6256/141/4/109. Retrieved April 2016.
- 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved April 2016.
- 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters 760 (1): 6. arXiv:1210.0502. Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. Retrieved April 2016.
- 1 2 3 4 5 6 "LCDB Data for (10115)". Asteroid Lightcurve Database (LCDB). Retrieved April 2016.
- ↑ Busch, Michael W.; Ostro, Steven J.; Benner, Lance A. M.; Giorgini, Jon D.; Jurgens, Raymond F.; Rose, Randy; et al. (March 2006). "Radar and optical observations and physical modeling of near-Earth Asteroid 10115 (1992 SK)". Icarus 181 (1): 145–155. Bibcode:2006Icar..181..145B. doi:10.1016/j.icarus.2005.10.024. Retrieved April 2016.
- 1 2 Polishook, David (July 2012). "Lightcurves and Spin Periods of Near-Earth Asteroids, The Wise Observatory, 2005 - 2010". The Minor Planet Bulletin 39 (3): 187–192. Bibcode:2012MPBu...39..187P. ISSN 1052-8091. Retrieved April 2016.
- 1 2 Warner, Brian D. (April 2014). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2013 September-December". The Minor Planet Bulletin 41 (2): 113–124. Bibcode:2014MPBu...41..113W. ISSN 1052-8091. Retrieved April 2016.
- ↑ Thomas, C. A.; Trilling, D. E.; Emery, J. P.; Mueller, M.; Hora, J. L.; Benner, L. A. M.; et al. (September 2011). "ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population". The Astronomical Journal 142 (3): 12. Bibcode:2011AJ....142...85T. doi:10.1088/0004-6256/142/3/85. Retrieved April 2016.
- ↑ Thomas, Cristina A.; Emery, Joshua P.; Trilling, David E.; Delbó, Marco; Hora, Joseph L.; Mueller, Michael (January 2014). "Physical characterization of Warm Spitzer-observed near-Earth objects". Icarus 228: 217–246. arXiv:1310.2000. Bibcode:2014Icar..228..217T. doi:10.1016/j.icarus.2013.10.004. Retrieved April 2016.
- 1 2 "10115 (1992 SK)". Minor Planet Center. Retrieved April 2016.
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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