astro.wikisort.org - Asteroid

2311 El Leoncito, provisional designation 1974 TA₁, is a dark and reddish asteroid from the outer region of the asteroid belt, approximately 53 kilometers in diameter. The asteroid was discovered by astronomers at Félix Aguilar Observatory at the Leoncito Astronomical Complex in Argentina on 10 October 1974.[3] It was later named after the discovering site.

2311 El Leoncito

Discovery [1]
Discovered by	Félix Aguilar Obs.
Discovery site	El Leoncito
Discovery date	10 October 1974
Designations
MPC designation	(2311) El Leoncito
Named after	El Leoncito (observatories)[2]
Alternative designations	1974 TA1 · 1928 DM 1944 KD · 1972 KH 1972 LM · 1976 AE
Minor planet category	main-belt · (outer)
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	44.87 yr (16,387 days)
Aphelion	3.7866 AU
Perihelion	3.4866 AU
Semi-major axis	3.6366 AU
Eccentricity	0.0412
Orbital period (sidereal)	6.94 yr (2,533 days)
Mean anomaly	107.06°
Mean motion	0° 8m 31.56s / day
Inclination	6.6174°
Longitude of ascending node	156.68°
Argument of perihelion	189.64°
Physical characteristics
Dimensions	53.1±3 km (IRAS:10)[1]
Geometric albedo	0.0388±0.005 (IRAS:10)[1]
Spectral type	Tholen = D [1] B–V = 0.752[1] U–B = 0.209[1]
Absolute magnitude (H)	10.52[1]

Orbit and classification

El Leoncito orbits the Sun in the outer main-belt at a distance of 3.5–3.8 AU once every 6 years and 11 months (2,533 days). Its orbit has an eccentricity of 0.04 and an inclination of 7° with respect to the ecliptic.[1]

It has a well-observed orbit with the lowest possible uncertainty – a condition code of 0 – and an observation arc that spans over a period of almost half a century, using precovery images on photographic plates from 1972.

Physical characteristics

El Leoncito is characterized as a D-type asteroid in the Tholen taxonomy, one of only 46 known asteroids of this spectral type.[4]

The body has a low albedo of 0.04, typical for D-type asteroids.[4] Its rotation period, however, remains unknown.[1]

Naming

This minor planet derives its name from the Spanish name of the discovering astronomical complex of observatories, the Complejo Astronómico El Leoncito (CASLEO).[2] The official naming citation was published by the Minor Planet Center on 22 September 1983 (M.P.C. 8153).[5]

References

External links

• 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
• 2311 El Leoncito at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2311 El Leoncito at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (2311) El Leoncito

(2311) El Leoncito (1974 TA1; 1928 DM; 1944 KD; 1972 KH; 1972 LM; 1976 AE) ist ein Asteroid des äußeren Hauptgürtels mit einem Durchmesser von ungefähr 53 Kilometern, der am 10. Oktober 1974 am Oak-Ridge-Observatorium des Harvard-Smithsonian Center for Astrophysics in Harvard (Massachusetts) (IAU-Code 801) entdeckt wurde.

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- [en] 2311 El Leoncito

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[ru] (2311) Эль-Леонсито

(2311) Эль-Леонсито (первоначальное обозначение 1974 TA1) — астероид внешней части пояса астероидов, обладает диаметром около 53 км. Астероид был открыт астрономами обсерватории имени Феликса Агилара в астрономическом комплексе Эль-Леонсито, Аргентина, 10 октября 1974 года.[2] Получил название в честь места открытия.

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