Matches in DBpedia 2016-04 for { ?s ?p "1999 Hirayama, provisional designation 1973 DR, is a carbonaceous asteroid from the outer region of the asteroid belt, about 34 kilometers in diameter. It was discovered by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory, Germany, on 27 February 1973.The C-type asteroid orbits the Sun at a distance of 2.8–3.5 AU once every five and a half years (2,008 days). Its orbit shows an eccentricity of 0.11 and is tilted by 13 degrees to the plane of the ecliptic. According to the surveys carried out by the space-based IRAS, Akari and WISE satellites and the subsequent NEOWISE mission, the body's surface has an albedo in the range of 0.05–0.09.The light curve analysis showed a periodicity of 7001156300000000000♠15.63±0.01 hours, during which time the brightness of the object varies by 6999450000000000000♠0.45±0.04 in magnitude. The spectrum of this object matches a C-type Tholen classification, but with a \"broad absorption band that can be associated to a process of aqueous alteration\". That is, the surface appears to show some form of water modification. A more recent observations rendered a somewhat shorter period of 13.6 hours.The minor planet is named in honour of Japanese astronomer Kiyotsugu Hirayama (1874–1943), best known for his discovery that many asteroid orbits were more similar to one another than chance would allow, leading to the concept of asteroid families, now called Hirayama families. The lunar carter Hirayama is also named in his honour."@en }
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- 1999_Hirayama abstract "1999 Hirayama, provisional designation 1973 DR, is a carbonaceous asteroid from the outer region of the asteroid belt, about 34 kilometers in diameter. It was discovered by Czech astronomer Luboš Kohoutek at the Hamburger Bergedorf Observatory, Germany, on 27 February 1973.The C-type asteroid orbits the Sun at a distance of 2.8–3.5 AU once every five and a half years (2,008 days). Its orbit shows an eccentricity of 0.11 and is tilted by 13 degrees to the plane of the ecliptic. According to the surveys carried out by the space-based IRAS, Akari and WISE satellites and the subsequent NEOWISE mission, the body's surface has an albedo in the range of 0.05–0.09.The light curve analysis showed a periodicity of 7001156300000000000♠15.63±0.01 hours, during which time the brightness of the object varies by 6999450000000000000♠0.45±0.04 in magnitude. The spectrum of this object matches a C-type Tholen classification, but with a \"broad absorption band that can be associated to a process of aqueous alteration\". That is, the surface appears to show some form of water modification. A more recent observations rendered a somewhat shorter period of 13.6 hours.The minor planet is named in honour of Japanese astronomer Kiyotsugu Hirayama (1874–1943), best known for his discovery that many asteroid orbits were more similar to one another than chance would allow, leading to the concept of asteroid families, now called Hirayama families. The lunar carter Hirayama is also named in his honour.".