Английская Википедия:1681 Steinmetz
1681 Steinmetz, provisional designation Шаблон:Mp, is a stony asteroid from the central region of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 23 November 1948, by French astronomer Marguerite Laugier at Nice Observatory in south-eastern France.[1] It was named after German amateur astronomer Julius Steinmetz.[2]
Orbit and classification
Steinmetz orbits the Sun in the central main-belt at a distance of 2.1–3.2 AU once every 4 years and 5 months (1,617 days). Its orbit has an eccentricity of 0.20 and an inclination of 7° with respect to the ecliptic.[3] Steinmetz was first identified as Шаблон:Mp at Heidelberg Observatory in 1914, extending the body's observation arc by 34 years prior to its official discovery observation at Nice.[1]
Physical characteristics
This asteroid is characterized as a common S-type asteroid in the Tholen classification.[3]
Rotation period
In December 2006, Italian amateur astronomer Silvano Casulli obtained a rotational lightcurve of Steinmetz from photometric observations. It gave a well-defined rotation period of 8.99917 hours with a brightness variation of 0.42 magnitude (Шаблон:Small).[4]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Steinmetz measures 14.58 and 16.16 kilometers in diameter, and its surface has an albedo of 0.204 and 0.161, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a diameter of 20.49 kilometers based on an absolute magnitude of 11.56.[7]
Naming
According to a proposal by Otto Kippes, who verified the discovery, this minor planet was named after Julius Steinmetz (1893–1965), a German amateur astronomer, orbit computer, and pastor from Gerolfingen in Bavaria.[2] The official naming citation was published by the Minor Planet Center on 1 October 1980 (Шаблон:Small).[8]
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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- Английская Википедия
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- Discoveries by Marguerite Laugier
- Named minor planets
- S-type asteroids (Tholen)
- Astronomical objects discovered in 1948
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