Английская Википедия:1219 Britta
1219 Britta, provisional designation Шаблон:Mp, is a stony background asteroid from the inner regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 6 February 1932, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southern Germany.[1] The likely elongated S-type asteroid has a rotation period of 5.57 hours.[2] Any reference of its name to a person is unknown.[3]
Orbit and classification
Britta is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4] Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Flora family (Шаблон:Small), a giant asteroid family and the largest family of stony asteroids in the main-belt.[2]
It orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 3 months (1,203 days; semi-major axis of 2.21 AU). Its orbit has an eccentricity of 0.12 and an inclination of 4° with respect to the ecliptic.[5]
The asteroid was first observed as Шаблон:Mp at Heidelberg Observatory in September 1904. The body's observation arc begins with its official discovery observation at Heidelberg in February 1932.[1]
Naming
This minor planet is named after a common German female name. Any reference of this name to a person or occurrence is unknown.[3]
Unknown meaning
Among the many thousands of named minor planets, Britta is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between Шаблон:Mp and Шаблон:Mp and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.[6]
Physical characteristics
Britta has been characterized as a stony S-type asteroid in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2).[7]
Rotation period
Several rotational lightcurvesШаблон:Efn of Britta have been obtained from photometric observations since the 1980s.[8][9][10][11][12][13] The consolidated lightcurve analysis results give a rotation period of 5.575 hours with a brightness amplitude between 0.48 and 0.75 magnitude, indicative of an elongated shape (Шаблон:Small).[2]
Spin axis
Modeled photometric data from the Lowell Photometric Database (LPD) and the robotic BlueEye600 Observatory, gave a concurring period of 5.57556 and 5.57557 hours, respectively.[14][15] Both studies determined two spin axes of (72.0°, −66.0°) and (241.0°, −66.0°), as well as (61.0°, −2.0°) and (223.0°, −68.0°) in ecliptic coordinates (λ, β).[14][15]
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, Britta measures between 9.860 and 11.76 kilometers in diameter and its surface has an albedo between 0.223 and 0.346.[16][17][18] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2629 and a diameter of 11.31 kilometers based on an absolute magnitude of 11.8.[2]
Notes
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон: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
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Use dmy dates Шаблон:Minor planets navigator Шаблон:Small Solar System bodies
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