Английская Википедия:1186 Turnera
Шаблон:Use dmy dates Шаблон:Infobox planet
1186 Turnera, provisional designation Шаблон:Mp, is a stony Eoan asteroid from the outer regions of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 1 August 1929, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg.[1] The asteroid was later named after British astronomer Herbert Hall Turner.[2]
Classification and orbit
Turnera is a member of the Eos family (Шаблон:Small), the largest asteroid family in the outer main-belt with nearly 10,000 known members.[3][4]Шаблон:Rp It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,922 days). Its orbit has an eccentricity of 0.10 and an inclination of 11° with respect to the ecliptic.[5] Turnera was first identified as Шаблон:Mp at Simeiz Observatory in September 1919. This observation, however, remains unused and the body's observation arc begins at Johannesburg with its official discovery observation in 1929.[1]
Physical characteristics
In the Tholen classification, Turnera is a common, stony S-type asteroid. In the SMASS classification, it is a Sq-type that transitions to the Q-type asteroids.[5] Generically, Eoan asteroids are also characterized as K-type asteroids with an albedo of 0.13.[4]Шаблон:Rp
Lightcurves
In January 2016, the best-rated rotational lightcurve of Turnera was obtained from photometric observations by the Spanish amateur astronomer group OBAS, Observadores de Asteroids. Lightcurve analysis gave a well-defined rotation period of 12.085 hours with a brightness variation of 0.31 magnitude (Шаблон:Small).[6] Previously, American astronomer Brian Warner obtained a similar period of 12.066 hours and an amplitude of 0.34 magnitude at his Palmer Divide Observatory (Шаблон:Small) in Colorado (Шаблон:Small).[7]Шаблон:Efn
Other lightcurve observations were made by French amateur astronomer Laurent Bernasconi (Шаблон:Val hours; Δmag of 0.25; Шаблон:Small) in February 2006,[8] and by Italian astronomer Maria A. Barucci (12.010 hours; Δmag of 0.20; Шаблон:Small) in August 1987.[9]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Turnera measures between 34.290 and 39.691 kilometers in diameter and its surface has an albedo between 0.12 and 0.2919.[10][11][12][13][14][15]
The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2919 and a diameter of 35.56 kilometers with an absolute magnitude of 9.20.[16]
Naming
This minor planet was named after British astronomer Herbert Hall Turner (1861–1930), director of the Radcliffe Observatory at University of Oxford.[2] He is also credited with coining the term "parsec". The official naming citation was published in Paul Herget's The Names of the Minor Planets in 1955 (Шаблон:Small).[2]
Notes
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- 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
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies
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- Английская Википедия
- Eos asteroids
- Discoveries by Cyril Jackson (astronomer)
- Named minor planets
- S-type asteroids (Tholen)
- Sq-type asteroids (SMASS)
- Astronomical objects discovered in 1929
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