2691 Sersic

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]

2691 Sersic
Discovery [1]
Discovered byFelix Aguilar Obs.
Discovery siteEl Leoncito Complex
Discovery date18 May 1974
Designations
(2691) Sersic
Named after
José Sersic
(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 arc67.02 yr (24,480 days)
Aphelion2.4977 AU
Perihelion1.9915 AU
2.2446 AU
Eccentricity0.1127
3.36 yr (1,228 days)
312.67°
0° 17m 35.16s / day
Inclination3.5937°
319.88°
277.14°
Known satellites1[4]
Physical characteristics
Dimensions5.438±0.119[5]
6.21 km (calculated)[3]
3.8811±0.0003 h
0.24 (assumed)[3]
0.261±0.062[5]
S [3]
13.2[1][3]

    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. "JPL Small-Body Database Browser: 2691 Sersic (1974 KB)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 18 June 2017.
    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. "LCDB Data for (2691) Sersic". Asteroid Lightcurve Database (LCDB). Retrieved 18 June 2017.
    4. Johnston, Robert. "(2691) Sersic". johnstonsarchive.net. Retrieved 18 June 2017.
    5. 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. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 18 June 2017.
    6. "2691 Sersic (1974 KB)". Minor Planet Center. Retrieved 18 June 2017.
    7. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 June 2017.

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