Английская Википедия:(15977) 1998 MA11

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Шаблон:Mp, provisional designation: Шаблон:Mp, is a Jupiter trojan from the Trojan camp, approximately Шаблон:Convert in diameter. It was discovered on 19 June 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Lab's ETS near Socorro, New Mexico, in the United States. The suspected tumbler is also a slow rotator with a period of 250 hours. It has not been named since its numbering in July 2000.

Orbit and classification

Шаблон:Mp is a Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Шаблон:L5 Lagrangian point, 60° behind its orbit Шаблон:Cross reference.

It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 10 months (4,309 days; semi-major axis of 5.18 AU). Its orbit has an eccentricity of 0.05 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins with a precovery published by the Digitized Sky Survey and taken at Palomar Observatory in December 1953, more than 44 years prior to its official discovery observation at Socorro.

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 26 July 2000 (Шаблон:Small). Шаблон:As of, it has not been named.

Physical characteristics

Шаблон:Mp is an assumed C-type asteroid. It has a typical V–I color index of 0.906 (see table below).

Rotation period

In August 2013, Robert Stephens at the Center for Solar System Studies observed Шаблон:Mp over three nights. However no meaningful rotational lightcurve could be determined, as the lightcurve's amplitude never varied more than 0.02 magnitude. A period of 11.17 hours was only derived for demonstration purpose (Шаблон:Small). In December 2015, Stephens obtained an improved lightcurve with a rotation period of Шаблон:Val hours and a brightness variation of 0.30 magnitude (Шаблон:Small). This time the asteroid was observed on 16 nights over a period of one month. The photometric observations also revealed that this object possibly has a non-principal axis rotation, which is commonly known as tumbling.Шаблон:Efn

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Japanese Akari satellite, Шаблон:Mp measures 43.53 and 51.53 kilometers in diameter and its surface has an albedo of 0.071 and 0.046, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 46.30 kilometers based on an absolute magnitude of 10.4.

External links

• Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
• Discovery Circumstances: Numbered Minor Planets (15001)-(20000) – Minor Planet Center
• Asteroid (15977) 1998 MA11 at the Small Bodies Data Ferret
• Шаблон:AstDys
• Шаблон:JPL small body