astro.wikisort.org - Asteroid

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 by	Felix Aguilar Obs.
Discovery site	El Leoncito Complex
Discovery date	18 May 1974
Designations
MPC designation	(2691) Sersic
Named after	José Sersic (Argentine astronomer)[2]
Alternative designations	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)
Aphelion	2.4977 AU
Perihelion	1.9915 AU
Semi-major axis	2.2446 AU
Eccentricity	0.1127
Orbital period (sidereal)	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°
Argument of perihelion	277.14°
Known satellites	1[4]
Physical characteristics
Dimensions	5.438±0.119[5] 6.21 km (calculated)[3]
Synodic rotation period	3.8811±0.0003 h
Geometric albedo	0.24 (assumed)[3] 0.261±0.062[5]
Spectral type	S [3]
Absolute magnitude (H)	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

External links

• Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• 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
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2691 Sersic at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (2691) Sersic

(2691) Sersic (1974 KB; 1938 UU; 1978 QR1) ist ein ungefähr fünf Kilometer großer Asteroid des inneren Hauptgürtels, der am 18. Mai 1974 am Felix-Aguilar-Observatorium im Nationalpark El Leoncito in der Provinz San Juan in Argentinien (IAU-Code 808) entdeckt wurde.

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- [en] 2691 Sersic

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