1146 Biarmia
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1146 Biarmia, provisional designation Template:Mp, is a metallic background asteroid from the outer regions of the asteroid belt, approximately 32 kilometers in diameter. It was discovered on 7 May 1929, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The asteroid was named for the Bjarmaland mentioned in Norse sagas.
Orbit and classification
Biarmia is not a member of any known asteroid family. It orbits the Sun in the outer main-belt at a distance of 2.3–3.8 AU once every 5 years and 4 months (1,940 days). Its orbit has an eccentricity of 0.26 and an inclination of 17° with respect to the ecliptic.[2]
The asteroid was first identified as Template:Mp at Winchester Observatory (799Script error: No such module "Check for unknown parameters".) in June 1913. The body's observation arc begins with its official discovery observation at Simeiz.[1]
Physical characteristics
Biarmia has been characterized in several observations as a metallic M-type asteroid.[3][4][5] In the Tholen classification, it is an X-type asteroid which also includes the M-types as a subgroup.[2][6]
Rotation period
The best-rated rotational lightcurves of Biarmia were obtained from photometric observations at the Etscorn Observatory (719Script error: No such module "Check for unknown parameters".), New Mexico, and at the S.O.S. Observatory (H39Script error: No such module "Check for unknown parameters".) in Minnesota, United States. Lightcurve analysis gave a rotation period of 5.468 and 5.4700 hours with a brightness amplitude of 0.22 and 0.20 magnitude, respectively (U=3/3Script error: No such module "Check for unknown parameters".).[7][8]Template:Efn
Other observations received a lower rating or have since been retracted.Template:Efn Warner's period of 11.514 hours was later revised to 5.33 (U=2Script error: No such module "Check for unknown parameters".).[9][10]
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, Biarmia measures between 21.59 and 38.567 kilometers in diameter and its surface has an albedo between 0.1436 and 0.455.[11][12][13][14][5]
The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, a stony albedo of 0.2190 and a diameter of 31.14 kilometers based on an absolute magnitude of 9.80.[6]
Naming
This minor planet was named for the Bjarmaland mentioned in Norse sagas. This legendary territory probably refers to the Russian region around Arkhangelsk on the White Sea near the Finnish border. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 107Script error: No such module "Check for unknown parameters".).[15]
Notes
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Script error: No such module "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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