Astronomy:(75482) 1999 XC173
| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 10 December 1999 |
| Designations | |
| (75482) 1999 XC173 | |
| 1999 XC173 · 2001 KY49 | |
| Minor planet category | main-belt · Vestian[2] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 16.82 yr (6,143 days) |
| |{{{apsis}}}|helion}} | 2.5436 AU |
| |{{{apsis}}}|helion}} | 2.1844 AU |
| 2.3640 AU | |
| Eccentricity | 0.0760 |
| Orbital period | 3.63 yr (1,328 days) |
| Mean anomaly | 310.28° |
| Mean motion | 0° 16m 16.32s / day |
| Inclination | 6.1205° |
| Longitude of ascending node | 58.882° |
| 48.553° | |
| Physical characteristics | |
| Dimensions | 2.96 km (calculated)[2] |
| Rotation period | 1234.1709±89.9916 h[3] |
| Geometric albedo | 0.20 (assumed)[2] |
| S[2] | |
| Absolute magnitude (H) | 14.5[1] · 14.557±0.004 (R)[3] · 15.01[2] |
(75482) 1999 XC173 is a stony Vestian asteroid and an exceptionally slow rotating body from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered on 10 December 1999, by LINEAR at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, United States.[4]
Classification and orbit
The body is classified as a S-type member of the Vesta family by the Collaborative Asteroid Lightcurve Link's Light Curve Data Base (LCDB) .[2] It orbits the Sun at a distance of 2.2–2.5 AU once every 3 years and 8 months (1,328 days). Its orbit has an eccentricity of 0.08 and an inclination of 6° with respect to the ecliptic.[1] A first precovery was obtained at the discovering observatory in October 1999, extending the asteroid's observation arc by 2 months prior to its official discovery observation.[4]
Physical characteristics
A rotational lightcurve was obtained for this asteroid from photometric observations at the Californian Palomar Transient Factory in September 2013. It gave a rotation period of 1234 hours with an estimated error margin of ±90 hours. (As of 2016), it is the 6th slowest rotating minor planet known to exist. Its high brightness variation of 0.69 magnitude indicates that it has a non-spheroidal shape ({{{1}}}).[3]
According to the LCDB, the body's surface has an assumed standard albedo for stony asteroids of 0.20 and a calculated diameter of 2.96 kilometers with an absolute magnitude of 15.01.[2]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 15 April 2004.[5] As of 2018, it has not been named.[4]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 75482 (1999 XC173)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2075482. Retrieved 1 June 2017.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "LCDB Data for (75482)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=75482%7C. Retrieved 13 September 2016.
- ↑ 3.0 3.1 3.2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 13 September 2016.
- ↑ 4.0 4.1 4.2 "75482 (1999 XC173)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=75482. Retrieved 13 September 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 24 February 2018.
External links
- 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 (75001)-(80000) – Minor Planet Center
- (75482) 1999 XC173 at the JPL Small-Body Database
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