Английская Википедия:2056 Nancy
Шаблон:Use dmy dates Шаблон:Infobox planet
2056 Nancy, 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 15 October 1909, by German astronomer Joseph Helffrich at Heidelberg Observatory in southwest Germany.[1] The S-type asteroid has a tentative rotation period of 15.0 hours.[2] It was named for Nancy Marsden, wife of British astronomer Brian G. Marsden.[3]
Orbit and classification
Nancy is a non-family asteroid of the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,206 days; semi-major axis of 2.22 AU). Its orbit has an eccentricity of 0.14 and an inclination of 4° with respect to the ecliptic.[4] The asteroid's observation arc begins with its official discovery observation at Heidelberg in October 1909.[1]
Naming
This minor planet was named after Nancy Lou Zissell Marsden, wife of British astronomer Brian G. Marsden, who established the asteroid's identification, and after whom another minor planet, 1877 Marsden, was previously named.[3] The official Шаблон:MoMP was published by the Minor Planet Center on 1 April 1978 (Шаблон:Small).[5]
Physical characteristics
Nancy is a common S-type asteroid in the SMASS classification.[4]
Lightcurves
As of 2018, only a single fragmentary lightcurve of Nancy has been obtained from photometric observation. Analysis of the rotational lightcurve gives a period of 15 hours with a brightness variation of 0.08 magnitude (Шаблон:Small).[2]Шаблон:Efn
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Nancy measures between 7.783 and 11.19 kilometers in diameter and its surface has an albedo between 0.16 and 0.351.[6][7][8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 10.30 kilometers based on an absolute magnitude of 12.3.[2]
Notes
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Background asteroids
- Discoveries by Joseph Helffrich
- Named minor planets
- S-type asteroids (SMASS)
- Astronomical objects discovered in 1909
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