Astronomy:2691 Sersic
| Discovery [1] | |
|---|---|
| Discovered by | Felix Aguilar Obs. |
| Discovery site | El Leoncito Complex |
| Discovery date | 18 May 1974 |
| Designations | |
| (2691) Sersic | |
| Named after | José Sersic (Argentine astronomer)[2] |
| 1974 KB · 1938 UU 1978 QR1 | |
| Minor planet category | main-belt · Flora [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.02 yr (24,480 days) |
| |{{{apsis}}}|helion}} | 2.4977 AU |
| |{{{apsis}}}|helion}} | 1.9915 AU |
| 2.2446 AU | |
| Eccentricity | 0.1127 |
| Orbital period | 3.36 yr (1,228 days) |
| Mean anomaly | 312.67° |
| Mean motion | 0° 17m 35.16s / day |
| Inclination | 3.5937° |
| Longitude of ascending node | 319.88° |
| 277.14° | |
| Known satellites | 1[4] |
| Physical characteristics | |
| Dimensions | 5.438±0.119[5] 6.21 km (calculated)[3] |
| Rotation period | 3.8811±0.0003 h |
| Geometric albedo | 0.24 (assumed)[3] 0.261±0.062[5] |
| S [3] | |
| Absolute magnitude (H) | 13.2[1][3] |
2691 Sersic, provisional designation 1974 KB, is a stony Florian asteroid and binary system from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered by staff members at the Felix Aguilar Observatory at El Leoncito Complex in Argentina, on 18 May 1974.[6] The asteroid was named after Argentine astronomer José Sersic.[2]
Classification and orbit
Sersic is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,228 days). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic.[1]
Physical characteristics
Diameter and albedo
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 6.21 kilometers with an absolute magnitude of 13.2.[3]
Satellite
Sersic is a binary asteroid. A minor-planet moon, designated S/2011 (2691) 1 was discovered in 2011 from lightcurve observations of the asteroid. It has a diameter of 2.15 ± 0.11 and an orbital period of 1 day, 2 hours, and 48 minutes.[3][4]
Naming
This minor planet was named in honor of José Luis Sersic (1933–1993), well known for his work in extragalactic astronomy and on supernovae (also see Sersic's law and Lenticular galaxy § Sérsic decomposition). He has served as director of the Córdoba Observatory.[2] The approved naming citation was published by the Minor Planet Center on 20 February 1989 (M.P.C. 14207).[7]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 2691 Sersic (1974 KB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002691.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(2691) Sersic". Dictionary of Minor Planet Names – (2691) Sersic. Springer Berlin Heidelberg. p. 220. doi:10.1007/978-3-540-29925-7_2692. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (2691) Sersic". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2691%7CSersic.
- ↑ 4.0 4.1 Johnston, Robert. "(2691) Sersic". http://www.johnstonsarchive.net/astro/astmoons/am-02691.html.
- ↑ 5.0 5.1 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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 18 June 2017.
- ↑ "2691 Sersic (1974 KB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2691.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- 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 (1)-(5000) – Minor Planet Center
- 2691 Sersic at AstDyS-2, Asteroids—Dynamic Site
- 2691 Sersic at the JPL Small-Body Database
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