Английская Википедия:14627 Emilkowalski

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14627 Emilkowalski (prov. designation: Шаблон:Mp) is a stony asteroid from the central region of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 7 November 1998, by American astronomer Richard Kowalski at the Quail Hollow Observatory (Шаблон:Small) in Zephyrhills, Florida, United States. The asteroid is the namesake of the recently formed Emilkowalski family of asteroids. It was named after Emil Kowalski, mentor of the discoverer.

Orbit and classification

Emilkowalski orbits the Sun in the central main-belt at a distance of 2.2–3.0 AU once every 4 years and 2 months (1,531 days). Its orbit has an eccentricity of 0.15 and an inclination of 18° with respect to the ecliptic.

The first unused observation at Palomar Observatory (DSS) dates back to 1953. The first used precovery was taken at Siding Spring Observatory in 1975, extending the asteroid's observation arc by 23 years prior to its discovery.

Emilkowalski family

Emilkowalski is the biggest member and namesake of a collisional group of asteroids, that resulted from the destruction of a larger parent body. The disruption happened approximately 220,000 years ago and it is one of the most recent asteroid breakups discovered in the main belt. The recently formed stony Emilkowalski family (family identification number: 523) consist of only 4 identified members.Шаблон:Rp The other members are Шаблон:LoMP, Шаблон:LoMP and Шаблон:LoMP.

Naming

This minor planet is named after American Emil Kowalski (1918–1994) from Syosset, New York, who inspired the discoverer of space science when he was still a child. The approved naming citation was published by the Minor Planet Center on 4 August 2001 (Шаблон:Small).

Physical characteristics

Emilkowalski has been characterized as a rare DL-type by Pan-STARRS photometric survey. It has also been assigned a taxonomic type of a darker carbonaceous and a common stony asteroid, respectively.Шаблон:Rp

Rotation period

Between January and March 2012, photometric observations for this asteroid were made by a team led by Petr Pravec at Ondřejov Observatory, Czech Republic. The three obtained rotational lightcurves gave an identical period of Шаблон:Val hours with a brightness variation of 0.55, 0.64 and 0.65 in magnitude, respectively (Шаблон:Small).Шаблон:Efn Previously, in 2008, a lightcurve was obtained from observations at the Simeiz Observatory and the Chuguev Observing Station (Шаблон:Small) in Ukraine, as well as at Maidanak Observatory in Uzbekistan. It also gave a period of 11.131 hours with an amplitude of 0.85 in magnitude, which implies an elongated shape (Шаблон:Small).

Diameter and albedo

According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Emilkowalski measures between 6.98 and 7.84 kilometers in diameter and its surface has an albedo of 0.09 and 0.201.

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and hence calculates a larger diameter of 10.6 kilometers.

External links

• Maidanak astronomical observatory (MAO), of the Ulugh Beg Astronomical Institute (UBAI), Uzbekistan Academy of Sciences
• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
• Шаблон:AstDys
• Шаблон:JPL small body