Astronomy:6159 Andréseloy
_Andr%C3%A9seloy.png) Shape model of Roberts from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | S. Ueda H. Kaneda |
| Discovery site | Kushiro Obs. (399) |
| Discovery date | 30 December 1991 |
| Designations | |
| (6159) Andréseloy | |
| Named after | Andrés Eloy Martínez (Mexican astronomer)[1] |
| 1991 YH · 1987 UY4 1990 OZ1 · 1990 SB17 | |
| Minor planet category | main-belt [1][2] · Vesta [3] |
| Orbital characteristics [2] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 29.62 yr (10,819 days) |
| |{{{apsis}}}|helion}} | 2.4341 AU |
| |{{{apsis}}}|helion}} | 2.1482 AU |
| 2.2912 AU | |
| Eccentricity | 0.0624 |
| Orbital period | 3.47 yr (1,267 days) |
| Mean anomaly | 173.81° |
| Mean motion | 0° 17m 3.12s / day |
| Inclination | 6.8577° |
| Longitude of ascending node | 30.291° |
| 56.793° | |
| Physical characteristics | |
| Mean diameter | 5.263±0.033 km[4][5] |
| Rotation period | 10.639±0.005 h[6] 10.6590±0.0005 h[7] |
| Pole ecliptic latitude | |
| Geometric albedo | 0.484±0.055[4][5] |
| S (assumed)[8] | |
| Absolute magnitude (H) | 12.8[4] · 13.5[1][2][8] |
6159 Andréseloy (prov. designation: 1991 YH) is a Vesta asteroid from the inner regions of the asteroid belt, approximately 5.3 kilometers (3.3 miles) in diameter. It was discovered on 30 December 1991, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at Kushiro Observatory (399) on the island of Hokkaido, Japan. It was named after Mexican astronomer Andrés Eloy Martínez.[1]
Orbit and classification
Andréseloy is an attributed member of the Vesta family,[3] one of the largest collisional populations of stony asteroids in the asteroid belt. It orbits the Sun in the inner main-belt at a distance of 2.1–2.4 AU (semi-major axis of 2.29 AU) once every 3 years and 6 months (1,267 days). Its orbit has an eccentricity of 0.06 and an inclination of 7° with respect to the ecliptic.[2] The asteroid was first observed as 1987 UY4 at Crimea–Nauchnij in 1987, extending the body's observation arc by 4 years prior to its official discovery observation at Kushiro.[1]
Naming
This minor planet was named in honor of Andrés Eloy Martínez, Mexican astronomer and citizen scientist. He is known in his country for the adaptation of the novel The War of the Worlds. He likes to create scientific videos for the Internet. His main concerns are global warming and the impact of an asteroid on Earth.[9]
Contest
The name was suggested by the Urania Astronomical Society (Spanish: Sociedad Astronomica Urania) of Mexico. This society was a winner of the NameExoWorlds contest organised by International Astronomical Union (IAU) in 2015, and was also awarded the naming right for this asteroid. In total, the naming of 17 minor planets such as 6117 Brevardastro was granted as an award to the contest's winners.[10] The official naming citation was approved by the IAU's Committee on Small Body Nomenclature and published by the Minor Planet Center on 12 February 2017 (M.P.C. 103029).[11]
Physical characteristics
Andréseloy has been characterized as a common S-type asteroid.[8]
Rotation and poles
In March 2006, a rotational lightcurve of Andréseloy was obtained from photometric observations by American astronomer Brian Warner at this Palmer Divide Observatory (716), Colorado. Lightcurve analysis gave an average rotation period of 10.639 hours with a brightness variation of 0.78 magnitude ({{{1}}}).[6] Such a high brightness amplitude typically indicates that the body has a non-spheroidal shape.
Poles
In 2013, an international study modeled a lightcurve with a concurring period of 10.6590 hours and found a spin axis of (266.0°, 67.0°) and (62.0°, 67.0°) in ecliptic coordinates (λ, β) ({{{1}}}).[7]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Andréseloy measures 5.263 kilometers in diameter and its surface has a high albedo of 0.484.[4][5] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 5.41 kilometers with an absolute magnitude of 13.5.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "6159 Andreseloy (1991 YH)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=6159.
- ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: 6159 Andreseloy (1991 YH)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006159.
- ↑ 3.0 3.1 "Asteroid (6159) Andréseloy – Proper elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?n=6159&pc=1.1.6.
- ↑ 4.0 4.1 4.2 4.3 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.
- ↑ 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 Warner, Brian D. (December 2006). "Asteroid lightcurve analysis at the Palmer Divide Observatory - February - March 2006". Minor Planet Bulletin 33 (4): 82–84. ISSN 1052-8091. Bibcode: 2006MPBu...33...82W. http://www.minorplanet.info/MPB/issues/MPB_33-4.pdf. Retrieved 13 June 2017.
- ↑ 7.0 7.1 7.2 7.3 Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R. et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy and Astrophysics 559: 19. doi:10.1051/0004-6361/201321993. Bibcode: 2013A&A...559A.134H.
- ↑ 8.0 8.1 8.2 8.3 "LCDB Data for (6159) Andréseloy". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=6159%7CAndréseloy.
- ↑ "Nombran asteroide en honor a mexicano" (in es). El Universal. 17 February 2017. http://www.eluniversal.com.mx/articulo/ciencia-y-salud/ciencia/2017/02/17/nombran-asteroide-en-honor-mexicano.
- ↑ "17 Minor Planets Named by NameExoWorlds Contest Winners". IAU – International Astronomical Union. https://www.iau.org/news/pressreleases/detail/iau1701/.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 6159 Andréseloy at AstDyS-2, Asteroids—Dynamic Site
- 6159 Andréseloy at the JPL Small-Body Database
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