astro.wikisort.org - Asteroid

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 kilometres (6.2 mi) 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.[2][8]

2675 Tolkien

Discovery [1]
Discovered by	M. Watt
Discovery site	Anderson Mesa Stn.
Discovery date	14 April 1982
Designations
MPC designation	(2675) Tolkien
Named after	J.R.R. Tolkien (English writer)[2]
Alternative designations	1982 GB · 1934 VO 1937 RH · 1939 FR 1949 FO · 1950 QA1 1952 DX · 1969 JE 1969 KB · 1970 RB 1973 QX · 1975 BV
Minor planet category	main-belt · Flora [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	79.45 yr (29,018 days)
Aphelion	2.4386 AU
Perihelion	1.9865 AU
Semi-major axis	2.2126 AU
Eccentricity	0.1022
Orbital period (sidereal)	3.29 yr (1,202 days)
Mean anomaly	96.710°
Mean motion	0° 17m 58.2s / day
Inclination	2.7535°
Longitude of ascending node	5.9040°
Argument of perihelion	1.7953°
Physical characteristics
Dimensions	9.65±0.23 km[4] 9.85 km (calculated)[3] 10.960±0.186 km[5]
Synodic rotation period	1060±30 h[6]
Geometric albedo	0.205±0.011[4] 0.213±0.021[5] 0.24 (assumed)[3]
Spectral type	SMASS = S [1] · S [3]
Absolute magnitude (H)	12.10[5] · 12.2[1][3] · 12.50[4] · 12.73±0.27[7]

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 astronomical units (300,000,000–360,000,000 km; 190,000,000–220,000,000 mi) 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.[1]

Physical characteristics

In the SMASS classification, Tolkien is a stony S-type asteroid.[1]

Rotation period

In February 2011, photometric observations of Tolkien were taken over the course of twenty-three nights. The obtained light curve 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+).[6] In addition, the body is suspected to be in a non-principal axis rotation ("tumbling").[3]

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 kilometres (6.00 and 6.81 mi), and its surface has an albedo of 0.205 and 0.213, respectively,[4][5] 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 kilometres (6.12 mi) with an absolute magnitude of 12.2.[3]

Naming

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.[2] The official naming citation was published by the Minor Planet Center on 1 December 1982 (M.P.C. 7474).[9]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2675 Tolkien at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2675 Tolkien at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (2675) Tolkien

(2675) Tolkien (1982 GB; 1934 VO; 1937 RH; 1939 FR; 1949 FO; 1950 QA1; 1952 DX; 1969 JE; 1969 KB; 1970 RB; 1973 QX; 1975 BV) ist ein ungefähr elf Kilometer großer Asteroid des inneren Hauptgürtels, der am 14. April 1982 vom US-amerikanischen Astronomen Martin Watt am La-Silla-Observatorium am Lowell-Observatorium, Anderson Mesa Station (Anderson Mesa) in der Nähe von Flagstaff, Arizona (IAU-Code 688) entdeckt wurde.

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- [en] 2675 Tolkien

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[es] (2675) Tolkien

(2675) Tolkien es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Martin Watt el 14 de abril de 1982 desde la Estación Anderson Mesa (condado de Coconino, cerca de Flagstaff, Arizona, Estados Unidos).

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[ru] (2675) Толкин

(2675) Толкин (англ. 2675 Tolkien, ранее 1982 GB) — каменный астероид семейства Флоры во внутренней части пояса астероидов; оценка диаметра составляет 10 км. Открыт 14 апреля 1982 года британским астрономом Мартином Уоттом на станции Андерсон-Меса в Аризоне, США. Малая планета названа в честь писателя Дж. Р. Р. Толкина.[7][8]

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