Английская Википедия:4962 Vecherka
Шаблон:Use dmy dates Шаблон:Infobox planet
4962 Vecherka, provisional designation Шаблон:Mp, is a Eunomian asteroid and slow rotator from the central regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 1 October 1973, by Soviet astronomer Tamara Smirnova at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] The asteroid was named after Vechernij Petersburg, a newspaper that also publishes astronomical information.[2]
Orbit and classification
When applying the hierarchical clustering method to its proper orbital elements, Vecherka has both been considered a non-family asteroid of the main belt's background population (according to Nesvorný),[3] and core member of the Maria family (according to Milani and Knežević).[4]
It orbits the Sun in the central asteroid belt at a distance of 2.2–3.0 AU once every 4 years and 3 months (1,537 days). Its orbit has an eccentricity of 0.15 and an inclination of 15° with respect to the ecliptic.[5] The body's observation arc begins with its first observation as Шаблон:Mp at Uccle Observatory in October 1952, or 21 years prior to its official discovery observation at Nauchnij.[1]
Physical characteristics
Vecherka is an assumed stony S-type asteroid,[6] which corresponds to the overall spectral type of the Maria family.[7]Шаблон:Rp
Slow rotator
In August 2015, a rotational lightcurve of Vecherka was obtained from photometric observations by a collaboration of Bulgarian astronomers. Lightcurve analysis gave a long rotation period of Шаблон:Val hours with a brightness variation of 1.08 magnitude (Шаблон:Small), indicating that the body's shape is irregular and elongated rather than spherical.[8] This long period makes Vecherka a slow rotator, which ranks among the Top 200 slowest ones known to exists.
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Vecherka measures between 8.54 and 9.951 kilometers in diameter and its surface has an albedo between 0.210 and 0.349.[9][10][11][12]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 10.06 kilometers based on an absolute magnitude of 12.3.[6]
Naming
Based on a proposal by the Institute of Theoretical Astronomy (ITA), this minor planet was named after Vechernij Petersburg, a popular evening newspaper from Saint Petersburg, Russia, that publishes astronomical information and articles popularizing astronomical knowledge on a regular basis.[2] The official naming citation was published by the Minor Planet Center on 14 December 1997 (Шаблон:Small).[13]
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 Шаблон:Authority control
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- Английская Википедия
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- Discoveries by Tamara Mikhaylovna Smirnova
- Named minor planets
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- Astronomical objects discovered in 1973
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