Astronomy:10476 Los Molinos
| Discovery[1] | |
|---|---|
| Discovered by | S. J. Bus |
| Discovery site | Siding Spring Obs. |
| Discovery date | 2 March 1981 |
| Designations | |
| (10476) Los Molinos | |
| Named after | Los Molinos Observatory[2] (Uruguayan observatory) |
| 1981 EY38 · 1978 NB3 | |
| Minor planet category | main-belt · (inner)[3] background[4] |
| Orbital characteristics[1] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 39.31 yr (14,358 days) |
| |{{{apsis}}}|helion}} | 2.9165 AU |
| |{{{apsis}}}|helion}} | 1.7185 AU |
| 2.3175 AU | |
| Eccentricity | 0.2585 |
| Orbital period | 3.53 yr (1,289 days) |
| Mean anomaly | 95.559° |
| Mean motion | 0° 16m 45.84s / day |
| Inclination | 9.4472° |
| Longitude of ascending node | 249.86° |
| 38.678° | |
| Physical characteristics | |
| Dimensions | 2.853±0.014 km[5][6] 2.96 km (calculated)[3] |
| Rotation period | 267.906±1.9703 h[7] |
| Geometric albedo | 0.20 (assumed)[3] 0.3424±0.0425[5][6] |
| S[3] | |
| Absolute magnitude (H) | 14.4[6] · 14.556±0.003 (R)[7] · 14.6[1] · 15.01[3] · 15.33±0.50[8] |
10476 Los Molinos, provisional designation 1981 EY38, is a stony background asteroid and slow rotator from the inner regions of the asteroid belt, approximately 2.9 kilometers (1.8 miles) in diameter. It was discovered on 2 March 1981, by American astronomer Schelte Bus at the Siding Spring Observatory in Australia. The asteroid was named for the Los Molinos Observatory in Uruguay.[2]
Orbit and classification
Los Molinos is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the inner asteroid belt at a distance of 1.7–2.9 AU once every 3 years and 6 months (1,289 days; semi-major axis of 2.32 AU). Its orbit has an eccentricity of 0.26 and an inclination of 9° with respect to the ecliptic.[1] The body's observation arc begins with its first observations as 1978 NB3 at Crimea–Nauchnij in July 1978.[2]
Physical characteristics
Based on its high albedo and its location within the asteroid belt, Los Molinos is an assumed S-type asteroid.[3]
Rotation period
In August 2010, a rotational lightcurve of Los Molinos was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 267.906±1.9703 hours with a brightness amplitude of 0.33 magnitude ({{{1}}}).[7] This makes Los Molinos one of the top 200 slow rotators known to exist.[3]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Los Molinos measures 2.853 kilometers in diameter and its surface has a high albedo of 0.34.[5][6]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 2.96 kilometers based on an absolute magnitude of 15.01.[3]
Naming
This minor planet was named after the Los Molinos Observatory (844) located near Montevideo in Uruguay. The observatory is known for its astrometric follow-up observations of asteroids and comets.[2] The official naming citation was published by the Minor Planet Center on 13 April 2017 (M.P.C. 103975/103976).[9]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 10476 Los Molinos (1981 EY38)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010476;cad=1.
- ↑ 2.0 2.1 2.2 2.3 "10476 Los Molinos (1981 EY38)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=10476.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (10476) Los Molinos". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=10476%7CLos%20Molinos.
- ↑ 4.0 4.1 "Asteroid 10476 Los Molinos – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=10476.
- ↑ 5.0 5.1 5.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 7.0 7.1 7.2 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.
- ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
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 (10001)-(15000) – Minor Planet Center
- 10476 Los Molinos at the JPL Small-Body Database
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