astro.wikisort.org - Asteroid

3851 Alhambra, provisional designation 1986 UZ, is a stony Flora asteroid and relatively slow rotator from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 30 October 1986, by Japanese astronomer Tsutomu Seki at Geisei Observatory in Kōchi, Japan.[8] The asteroid was named for the World Heritage Site Alhambra, in Granada, Spain.[2]

3851 Alhambra

Discovery [1]
Discovered by	T. Seki
Discovery site	Geisei Obs.
Discovery date	30 October 1986
Designations
MPC designation	(3851) Alhambra
Named after	Alhambra (World Heritage Site)[2]
Alternative designations	1986 UZ · 1950 MC 1960 RA · 1965 CD 1973 SE4 · 1973 ST2
Minor planet category	main-belt · Flora [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	66.95 yr (24,452 days)
Aphelion	2.3148 AU
Perihelion	2.0338 AU
Semi-major axis	2.1743 AU
Eccentricity	0.0646
Orbital period (sidereal)	3.21 yr (1,171 days)
Mean anomaly	188.88°
Mean motion	0° 18m 26.64s / day
Inclination	4.6276°
Longitude of ascending node	344.66°
Argument of perihelion	97.438°
Physical characteristics
Dimensions	6.504±0.390[4] 6.51 km (calculated)[3] 6.813±0.036 km[5]
Synodic rotation period	53 h[6]
Geometric albedo	0.218±0.052[4] 0.24 (assumed)[3] 0.2419±0.0418[5]
Spectral type	S [3]
Absolute magnitude (H)	13.0[5] · 13.1[1][3] · 13.78±0.00[7]

Orbit and classification

The S-type asteroid 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 2.0–2.3 AU once every 3 years and 3 months (1,171 days). Its orbit has an eccentricity of 0.06 and an inclination of 5° with respect to the ecliptic.[1] The first precovery was taken at La Plata Astronomical Observatory in 1950, extending the asteroid's observation arc by 36 years prior to its discovery.[8]

Physical characteristics

A rotational lightcurve of Alhambra was obtained from photometric observations made at the Australian Hunters Hill Observatory (E14) in March 2007. It rendered a long rotation period of 53 hours with a brightness amplitude of 0.35 in magnitude (U=2).[6] While not being a slow rotator, Alhambra's period is much longer than that of most asteroids.

According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Alhambra measures 6.5 and 6.8 kilometers in diameter and its surface has an albedo of 0.218 and 0.242, respectively,[4][5] while 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 6.5 kilometers with an absolute magnitude of 13.1.[3]

Naming

This minor planet was named for the Alhambra ("the red one"), the famous medieval palace and fortress complex of the Moorish emirs, located in Granada, Andalusia, Spain. The place with its Islamic architecture is now a UNESCO World Heritage Site and one of Spain's major tourist attractions. The virtuoso classical guitarist Andrés Segovia, after whom the minor planet 3822 Segovia is named, had the piece Recuerdos de la Alhambra (Memories of the Alhambra) in his repertoire.[2] The official naming citation was published by the Minor Planet Center on 21 April 1989 (M.P.C. 14482).[9]

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
• 3851 Alhambra at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3851 Alhambra at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (3851) Alhambra

(3851) Alhambra ist ein Asteroid des Hauptgürtels, der am 30. Oktober 1986 vom japanischen Astronomen Tsutomu Seki am Geisei-Observatorium (IAU-Code 372) in der Präfektur Kōchi entdeckt wurde.

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- [en] 3851 Alhambra

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[es] (3851) Alhambra

(3851) Alhambra es un asteroide perteneciente al cinturón de asteroides, descubierto el 30 de octubre de 1986 por Tsutomu Seki desde el Observatorio de Geisei, Geisei, Japón.

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[ru] (3851) Альгамбра

(3851) Альгамбра (англ. 3851 Alhambra, ранее 1986 UZ) — каменный медленно вращающийся астероид семейства Флоры во внутренней части пояса астероидов; диаметр объекта составляет около 7 км. Открыт 30 октября 1986 года японским астрономом Цутому Сэки в обсерватории Гейсей, Коти, Япония.[7] Астероид назван в честь объекта всемирного наследия Альгамбра в Испании.[8]

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