Английская Википедия:2577 Litva

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2577 Litva, provisional designation Шаблон:Mp, is a Hungarian-type Mars-crosser and rare trinaryШаблон:Efn asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter.

It was discovered on 12 March 1975, by Soviet–Ukrainian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. It was named for the former Lithuanian Soviet Socialist Republic, which is now the nation of Lithuania.

Orbit and classification

Litva is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.6–2.2 AU once every 2 years and 8 months (960 days). Its orbit has an eccentricity of 0.14 and an inclination of 23° with respect to the ecliptic.

Physical characteristics

In the Tholen taxonomy, Litva is classified as an EU-type, a subtype of the bright E-type asteroids. It has also been characterized as a Sl-type and Q-type asteroid by astronomers using the New Technology Telescope at La Silla and by PanSTARRSШаблон:' photometric survey, respectively.

Rotation period

The body has a rotation period between 2.81288 and 2.82 hours, superseding the original measurement that gave 5.618 hours. Most recent photometric observation from 2014, gave a refined period of Шаблон:Val hours, using a statistical Bayesian inference methodology.

Trinary system

In March 2009 the Central Bureau for Astronomical Telegrams announced the discovery of a moon orbiting the asteroid.Шаблон:Efn The satellite measures about 1.4 kilometer in diameter and orbits Litva at distance of 21 kilometers, with an orbital period of 1 day, 11 hours, and 53 minutes. In 2012, a second satellite orbiting at a distance of 378 kilometers, with a diameter of 1.2 kilometers, was discovered, with a rotation period of 214 days. The discovery was announced in late 2013. This made 2577 Litva the 11th asteroid discovered to be in a trinary system.Шаблон:Efn

Naming

This minor planet was named after the Russian name for the Baltic state Lithuania, former member of the Soviet Union and now an independent Republic. The official naming citation was published by the Minor Planet Center on 1 December 1982 (Шаблон:Small).

External links

• Lightcurve plot of 2577 Litva, Palmer Divide Observatory, B. D. Warner (2010)
• Central Bureau for Astronomical Telegrams – CBET No. 1715
• 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