Astronomy:2691 Sersic

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2691 Sersic
Discovery [1]
Discovered byFelix Aguilar Obs.
Discovery siteEl Leoncito Complex
Discovery date18 May 1974
Designations
(2691) Sersic
Named afterJosé Sersic
(Argentine astronomer)[2]
1974 KB · 1938 UU
1978 QR1
Minor planet categorymain-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc67.02 yr (24,480 days)
|{{{apsis}}}|helion}}2.4977 AU
|{{{apsis}}}|helion}}1.9915 AU
2.2446 AU
Eccentricity0.1127
Orbital period3.36 yr (1,228 days)
Mean anomaly312.67°
Mean motion0° 17m 35.16s / day
Inclination3.5937°
Longitude of ascending node319.88°
277.14°
Known satellites1[4]
Physical characteristics
Dimensions5.438±0.119[5]
6.21 km (calculated)[3]
Rotation period3.8811±0.0003 h
Geometric albedo0.24 (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

External links