145534 Jhongda
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145534 Jhongda, provisional designation Template:Mp, is an asteroid and member of the stony Merxia family, orbiting in the central region of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered by Taiwanese astronomers Yang Tingzhang and Ye Quanzhi at the Lulin Observatory on 1 April 2006. The likely elongated asteroid has a rotation period of 4.5 hours.[1] It was named for the Taiwanese National Central University.[2]
Orbit and classification
Jhongda is a member of the Merxia family (513Script error: No such module "Check for unknown parameters".),[3][4] a large family of stony S-type asteroids named after its parent body 808 Merxia.[5]Template:Rp It orbits the Sun in the central main-belt at a distance of 2.3–3.1 AU once every 4 years and 5 months (1,625 days; semi-major axis of 2.71 AU). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic.[6] The first precovery was taken by Spacewatch in February 1992, extending the asteroid's observation arc by 14 years prior to its discovery at the Lulin Observatory.[2]
Naming
This minor planet was named after the Taiwanese National Central University, which controls the discovering Lulin Observatory. "Jhongda" is the University's abbreviation in Mandarin Chinese.[2] The official Template:MoMP was published by the Minor Planet Center on 2 April 2007 (M.P.C. 59389Script error: No such module "Check for unknown parameters".).[7]
Physical characteristics
In January 2014, a rotational lightcurve of Jhongda was obtained from photometric observation by astronomers at the Intermediate Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of Script error: No such module "val". hours with a high brightness variation of 0.67 in magnitude (U=2Script error: No such module "Check for unknown parameters".) indicative of an elongated, non-spherical shape.[8] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 3.54 kilometers with an absolute magnitude of 15.98.[1] Conversely, Jhongda measure only 2.1 kilometers for an albedo of 0.23,[9] which is typical for the stony members of the Merxia family.[5]Template:Rp
References
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (145001)-(150000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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