3724 Annenskij
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3724 Annenskij, provisional designation Template:Mp, is a stony Gefionian asteroid from the central regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 23 December 1979, by Soviet astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] The S-type asteroid has a rotation period of 3.97 hours.[2] It was named for Russian poet Innokenty Annensky.[1]
Orbit and classification
Annenskij is a member of the Gefion family (516Script error: No such module "Check for unknown parameters".),[3] a large asteroid family in the intermediate asteroid belt, named after 1272 Gefion.[4] It is also known as the Ceres or Minerva family.
It orbits the Sun in the central main-belt at a distance of 2.3–3.2 AU once every 4 years and 7 months (1,680 days; semi-major axis of 2.77 AU). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic.[5] The body's observation arc begins with its first observation as Template:Mp at Heidelberg Observatory in December 1933, or 46 years prior to its official discovery observation at Nauchnij.[1]
Physical characteristics
Based on its classification into the Gefion family, Annenskij is a stony S-type asteroid.[4]Template:Rp
Rotation period
Two rotational lightcurves of Annenskij were obtained from photometric observations by Italian and French amateur astronomers Silvano Casulli, Laurent Bernasconi and Cyril Cavadore . Lightcurve analysis gave a rotation period of 3.969 and 3.974 hours with a brightness amplitude of 0.30 and 0.28 magnitude (U=3-/3Script error: No such module "Check for unknown parameters".).[6]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Annenskij measures between 12.09 and 15.386 kilometers in diameter and its surface has an albedo between 0.1744 and 0.235.[7][8][9][10][11][12]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2021 and a diameter of 14.15 kilometers based on an absolute magnitude of 11.6.[2]
Naming
This minor planet was named after Russian poet and writer Innokenty Annensky (1855–1909).[1] The official naming citation was published by the Minor Planet Center on 4 June 1993 (M.P.C. 22246Script error: No such module "Check for unknown parameters".) with a correction on Annensky's date of death published on 4 February 1996 (M.P.C. 26439Script error: No such module "Check for unknown parameters".).[13]
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- 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
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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