Английская Википедия:1102 Pepita

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1102 Pepita, provisional designation Шаблон:Mp, is a stony background asteroid from the outer regions of the asteroid belt, approximately 39 kilometers in diameter. It was discovered on 5 November 1928, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain. It was named after the discoverer by the feminine form of his nickname. The asteroid has a rotation period of 5.1 hours.

Orbit and classification

Pepita is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.4 AU once every 5 years and 5 months (1,966 days; semi-major axis of 3.07 AU). Its orbit has an eccentricity of 0.11 and an inclination of 16° with respect to the ecliptic.

In May 1899, the asteroid was first observed as Шаблон:Mp at Harvard's Boyden Station in Arequipa, Peru (Шаблон:Small). The body's observation arc begins with its official discovery observation at Barcelona.

Physical characteristics

In the SMASS classification, Pepita is a stony S-type asteroid, which agrees with the body's measured geometric albedo (see below). Conversely, it is also classified as a carbonaceous C-type asteroid by Tholen.

Rotation period and poles

Three rotational lightcurves of Pepita were obtained from photometric observations by astronomers Hilari Pallares and Enric Forné (2006, Шаблон:Small), Pierre Antonini and René Roy (2007, Шаблон:Small), as well as by Robert Stephens (2007, Шаблон:Small). The consolidated lightcurve gave a well-defined rotation period of 5.1054 hours with a brightness amplitude between 0.31 and 0.36 magnitude.

In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue and other sources gave a concurring sidereal period 5.10532 hours, as well as two spin axes of (25.0°, −34.0°) and (231.0°, −30.0°) in ecliptic coordinates (λ, β).

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, Pepita measures between 30.88 and 41.733 kilometers in diameter and its surface has an albedo between 0.1842 and 0.322.

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1991 and a diameter of 39.27 kilometers based on an absolute magnitude of 9.40.

Naming

This minor planet was named after the discoverer, Josep Comas i Solà (1868–1937), by the feminine form of his nickname, "Pepito". He was the first director of the discovering Fabra Observatory and founded the Astronomical Society of Spain and America (Шаблон:Lang-es, SADEYA).

The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small). The asteroid 1655 Comas Solà is also named after him, as is the Martian crater Comas Sola.

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