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1909 Alekhin

Main-belt asteroid

Field	Value
minorplanet	yes
name	1909 Alekhin
background	#D6D6D6
discovery_ref
discovered	4 September 1972
discoverer	L. Zhuravleva
discovery_site	Crimean Astrophysical Obs.
mpc_name	(1909) Alekhin
alt_names	1926 GU
1930 KF1930 KM
1934 NZ1934 OC
1941 FJ1960 FD
1969 UU1971 DL
named_after	Alexander Alekhine
(chess grandmaster)
mp_category	main-belt(inner)
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	91.06 yr (33,259 days)
aphelion	2.9693 AU
perihelion	1.8758 AU
semimajor	2.4226 AU
eccentricity	0.2257
period	3.77 yr (1,377 days)
mean_anomaly	53.882°
mean_motion	/ day
inclination	1.7955°
asc_node	227.46°
arg_peri	5.6412°
dimensions	km
17.33 km (derived)
km (IRAS:15)
km
km
rotation	h
h
albedo	0.0446 (derived)
(IRAS:15)
spectral_type	S
abs_magnitude	12.3012.60 (R)12.812.9

1930 KF1930 KM 1934 NZ1934 OC 1941 FJ1960 FD 1969 UU1971 DL (chess grandmaster) 17.33 km (derived) km (IRAS:15) km

km h

(IRAS:15)

1909 Alekhin, provisional designation , is a stony asteroid and slow rotator from the inner regions of the asteroid belt, approximately 17 kilometers in diameter. It was discovered on 4 September 1972, by Russian–Ukrainian astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory, Nauchnyj, on the Crimean peninsula, and named after chess grandmaster and World Chess Champion Alexander Alekhine.

Orbit and classification

The S-type asteroid orbits the Sun in the inner main-belt at a distance of 1.9–3.0 AU once every 3 years and 9 months (1,377 days). Its orbit has an eccentricity of 0.23 and an inclination of 2° with respect to the ecliptic.

Physical characteristics

Slow rotator

Alekhin is a slow rotator. In March 2009 and September 2010, two rotational lightcurves for Alekhin were obtained from photometric observations made by the Palomar Transient Factory and by astronomer Roger Dymock, respectively. The lightcurves gave a rotation period of 148 hours with a brightness variation of 0.42–0.45 magnitude ().

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alekhin measures between 15.5 and 18.8 kilometers in diameter and its surface has an albedo of 0.046 to 0.070. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.045 and a diameter of 17.3 kilometers with an absolute magnitude of 12.8.

Occultation

Alekhin is scheduled to occlude a 9.1 magnitude star in the Leo constellation on 30 November 2008, dimming the magnitude of both heavenly bodies for a maximum duration of 0.6 seconds. Astronomers had, as of March 2008, not predicted an optimal trajectory for the event.

Naming

This minor planet was named in honour of Russian-born Alexander Alekhine (1892–1946), chess grandmaster, considered one of the greatest chess players ever. The official was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3937).

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

background-asteroids discoveries-by-lyudmila-zhuravleva named-minor-planets slow-rotating-minor-planets astronomical-objects-discovered-in-1972 alexander-alekhine

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