(9948) 1990 QB2
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Template:Mp (provisional designation Template:Mp) is a stony Nysian asteroid from the inner region of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 22 August 1990, by American astronomer Henry Holt at the Palomar Observatory in California.[1] The likely elongated S-type asteroid has a rotation period of 3.53 hours.[2] This asteroid has not been named.[1]
Orbit and classification
Template:Mp is member of the Nysa family (405Script error: No such module "Check for unknown parameters".),[3] located in the Nysa–Polana complex. It is named after 44 Nysa and one of the largest families in the main belt.[4]Template:Rp
The asteroid orbits the Sun in the inner asteroid belt at a distance of 1.9–2.9 AU once every 3 years and 8 months (1,344 days; semi-major axis of 2.38 AU). Its orbit has an eccentricity of 0.22 and an inclination of 2° with respect to the ecliptic.[5] The asteroid was first observed as Template:Mp at Crimea–Nauchnij in September 1979. The body's observation arc begins at Palomar with its official discovery observation in 1990.[1]
Physical characteristics
Template:Mp has been characterized as a common, stony S-type asteroid by Pan-STARRSTemplate:' survey and in the SDSS-based taxonomy.[2][6][7]
Rotation period
In November 2005, a first rotational lightcurve of Template:Mp was obtained from photometric observations by Australian amateur astronomer David Higgins. Lightcurve analysis gave a well-defined rotation period of 3.5257 hours with a high brightness variation of 0.77 magnitude (U=3Script error: No such module "Check for unknown parameters".).[8] In January 2014, observations in the R-band at the Palomar Transient Factory in California gave two concurring periods of 3.523 and 3.53 hours with an amplitude of 0.60 magnitude (U=2/2Script error: No such module "Check for unknown parameters".).[9][10] A high brightness amplitude typically indicates that the body has a non-spherical shape
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Template:Mp measures 3.345 kilometers in diameter and its surface has an albedo of 0.250.[11][12] The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-result, that is, an albedo of 0.2232 and a diameter of 3.351 kilometers based on an absolute magnitude of 14.62.[2][13]
Naming
This minor planet was numbered on 2 February 1999 (M.P.C. 33659Script error: No such module "Check for unknown parameters".).[14] As of 2018, it has not been named.[1]
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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