سیارک ۲۶۷۵ (به انگلیسی: 2675 Tolkien، نامگذاری:1982GB) دو هزار و ششصد و هفتاد و پنجمین سیارک کشف شدهاست که در ۱۴ آوریل ۱۹۸۲ کشف شد. نام این سیارک به افتخار زبانشناس و استاد دانشگاه آکسفورد، جی. آر. آر. تالکین نویسندهٔ رمانهای پرطرفدار ارباب حلقهها و هابیت انتخاب شدهاست.
پیوند به بیرون[ویرایش]
2675 Tolkien, provisional designation 1982 GB, is a stony Florian asteroid and extremely slow rotator from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 14 April 1982, by British astronomer Martin Watt at Lowell's Anderson Mesa Station in Flagstaff, Arizona, and later named for J. R. R. Tolkien.
Orbit and classification
Tolkien is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 2.0–2.4 AU once every 3 years and 3 months (1,202 days). Its orbit has an eccentricity of 0.10 and an inclination of 3° with respect to the ecliptic.
In February 2011, photometric observations of Tolkien were taken over the course of twenty-three nights. The obtained lightcurve revealed that the body is potentially an extremely slow rotator, that has an outstandingly long rotation period of 1058±30 hours, or 44 days, with a brightness amplitude of 0.1 magnitude (U=2+) . An asteroid typically takes only a few hours to rotate once around its axis.
In addition, the body is suspected to be in a non-principal axis rotation ("tumbling"). Observations were taken from the Via Capote Observatory (G69) in California, the Czech Ondřejov Observatory, and the private Shed of Science Observatory (also known as S.O.S. Observatory), near the U.S. city of Minneapolis. (Also see § External links).
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the body measures 9.65 and 10.96 kilometers and its surface has an albedo of 0.205 and 0.213, respectively, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 9.85 kilometers with an absolute magnitude of 12.2.
This minor planet was named in honour of J.R.R. Tolkien (1892–1973), an English writer, philologist, and Merton professor of English language at the University of Oxford. He is best known as the author of the fantasy novels The Hobbit and The Lord of the Rings. Tolkien also had a lifelong interest in astronomy. The official naming citation was published by the Minor Planet Center on 1 December 1982 (M.P.C. 7474).