6709 Hiromiyuki
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6709 Hiromiyuki, provisional designation Template:Mp, is a background or Florian asteroid from the inner regions of the asteroid belt, approximately Script error: No such module "convert". in diameter. It was discovered on 2 February 1989, by Japanese amateur astronomers Masaru Arai and Hiroshi Mori at the Yorii Observatory in Japan.[1] The possibly elongated S-type asteroid has a rotation period of 6.8 hours.[2] It was named after the Hiroshi Mori's children, Hiroyuki and Miyuki.[1]
Orbit and classification
Hiromiyuki is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[3][4] Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Flora family (402Script error: No such module "Check for unknown parameters".), a giant asteroid family and the largest family of stony asteroids in the main-belt.[2]
Hiromiyuki orbits the Sun in the inner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,315 days; semi-major axis of 2.35 AU). Its orbit has an eccentricity of 0.16 and an inclination of 2° with respect to the ecliptic.[5] The body's observation arc begins with its first observation as Template:Mp at Goethe Link Observatory in September 1955, more than 33 years prior to its official discovery observation at Yorii.[1]
Physical characteristics
Hiromiyuki is an assumed S-type asteroid based on its classification into the Flora family.[2]
Rotation period
In February 2007, a rotational lightcurve of Hiromiyuki was obtained from photometric observations by Donald P. Pray at Carbuncle Hill Observatory Template:Obscode, in collaboration with Adrián Galád, Marek Husárik, and Julian Oey. Lightcurve analysis gave a rotation period of 6.828 hours with an exceptionally high brightness amplitude of Script error: No such module "val". magnitude (U=3Script error: No such module "Check for unknown parameters".), which typically indicates that the body has an elongated shape.[2][6]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hiromiyuki measures 3.98 kilometers in diameter and its surface has a high albedo of 0.34.[7] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family – and calculates a diameter of 4.50 kilometers based on an absolute magnitude of 13.9.[2]
Naming
This minor planet was named after Hiroyuki (born 1991) and Miyuki Mori (born 1993), son and daughter of the second co-discoverer Hiroshi Mori.[1] The official naming citation was published by the Minor Planet Center on 6 March 2004 (M.P.C. 51186Script error: No such module "Check for unknown parameters".).[8]
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 (5001)-(10000) – Minor Planet Center
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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