Английская Википедия:1428 Mombasa

Содержание

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

Текст

1428 Mombasa, provisional designation Шаблон:Mp, is a dark asteroid from the middle region of the asteroid belt, approximately 56 kilometers in diameter.

It was discovered on 5 July 1937, by English-born South African astronomer Cyril Jackson at Johannesburg Observatory, South Africa, and later named after Mombasa, Kenya.

Orbit and classification

Mombasa orbits the Sun at a distance of 2.4–3.2 AU once every 4 years and 9 months (1,720 days). Its orbit has an eccentricity of 0.14 and an inclination of 17° with respect to the ecliptic. Mombasa was first identified as Шаблон:Mp at Lowell Observatory, extending the body's observation arc by 4 years prior to its official discovery at Johannesburg.

Physical characteristics

Rotation period

American astronomer Robert Stephens obtained a rotational lightcurve of Mombasa in June 2012. Light-curve analysis gave a rotation period of 16.67 hours with a brightness variation of 0.16 magnitude (Шаблон:Small).Шаблон:Efn Previous lightcurves were obtained by French amateur astronomer René Roy in February 2006 (17.6 hours, Δ0.15 mag; Шаблон:Small), as well as by Scot Hawkins and Richard Ditteon at Oakley Observatory in May 2007 (17.12 hours, Δ0.25 mag; Шаблон:Small).

Spectral type, diameter and albedo

On the SMASS taxonomic scheme, Mombasa is a Xc-type, an intermediate between the carbonaceous C and X-type, while it is also described as a darker P-type asteroid. According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Mombasa measures between 52.46 and 62.45 kilometers in diameter, ignoring a preliminary result of 127 km, and its surface has an albedo of 0.025 and 0.06. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0415 and a diameter of 56.83 kilometers with an absolute magnitude of 10.3.

Naming

This minor planet was named after Mombasa, chief-port and second largest city of Kenya on the coast of East Africa. The official Шаблон:MoMP was published by the Minor Planet Center in April 1953 (Шаблон:Small).

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