| Discovery[1] | |
|---|---|
| Discovered by | Felix Aguilar Obs. |
| Discovery site | El Leoncito Complex |
| Discovery date | 18 May 1974 |
| Designations | |
| (2691) Sérsic | |
Named after | José Sérsic (Argentine astronomer)[2] |
| 1974 KB · 1938 UU 1978 QR1 | |
| 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) |
| Aphelion | 2.4977AU |
| Perihelion | 1.9915 AU |
| 2.2446 AU | |
| Eccentricity | 0.1127 |
| 3.36yr (1,228 days) | |
| 312.67° | |
| 0° 17m 35.16s / day | |
| Inclination | 3.5937° |
| 319.88° | |
| 277.14° | |
| Knownsatellites | 1[4] |
| Physical characteristics | |
| Dimensions | 5.438±0.119[5] 6.21 km(calculated)[3] |
| 3.8811±0.0003h | |
| 0.24(assumed)[3] 0.261±0.062[5] | |
| S[3] | |
| 13.2[1][3] | |
2691 Sérsic, provisional designation1974 KB, is a stony Florianasteroid andbinary system from the inner regions of theasteroid belt, approximately 6 kilometers in diameter. It was discovered by staff members at theFelix Aguilar Observatory atEl Leoncito Complex in Argentina, on 18 May 1974.[6] The asteroid was named after Argentine astronomerJosé Luis Sérsic.[2]
Sérsic is a member of theFlora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in theinner main-belt at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,228 days). Its orbit has aneccentricity of 0.11 and aninclination of 4° with respect to theecliptic.[1]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 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]
Sérsic is abinary asteroid. Aminor-planet moon was discovered in 2011 fromlightcurve 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]
Thisminor planet was named in honor of José Luis Sérsic (1933–1993), well known for his work in extragalactic astronomy and on supernovae(also seeSérsic profile andLenticular galaxy § Sérsic decomposition). He has served as director of the Córdoba Observatory.[2] The approved naming citation was published by theMinor Planet Center on 20 February 1989 (M.P.C. 14207).[7]
