Английская Википедия:767 Bondia

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767 Bondia (prov. designation: Шаблон:Mp or Шаблон:Mp) is a Themis asteroid from the outer regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 23 September 1913, by American astronomer Joel Hastings Metcalf at his observatory Шаблон:Obscode in Winchester, Massachusetts. The B-type asteroid has a rotation period of 8.3 hours. It was named after William Cranch Bond (1789–1859) and his son George Phillips Bond (1825–1865), both American astronomers and directors of the Harvard College Observatory in Cambridge, Massachusetts.

Orbit and classification

Bondia is a core member the Themis family (Шаблон:Small), a very large family of carbonaceous asteroids, named after 24 Themis.Шаблон:Rp It orbits the Sun in the outer main-belt at a distance of 2.6–3.7 AU once every 5 years and 6 months (2,015 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.18 and an inclination of 2° with respect to the ecliptic.

The Themistian asteroid was first observed as Шаблон:Mp (Шаблон:Mp) at Heidelberg Observatory on 26 September 1902. The body's observation arc begins at Bergedorf Observatory in September 1915, or two years after its official discovery observation by Metcalf at Winchester Observatory.

Naming

This minor planet was named after American astronomers William Cranch Bond (1789–1859) and his son George Phillips Bond (1825–1865), both directors of the Harvard College Observatory in Cambridge, Massachusetts. Former co-discovered Шаблон:Nowrap and pioneered the use of photographic plates in astronomy. The latter is best known for his 1848 co-discovery of Hyperion, a moon of Saturn. He also discovered Saturn's faint C Ring, also known as Crepe Ring. The Шаблон:MoMP was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small). The lunar craters W. Bond and G. Bond were named in honor of the two American astronomers. In addition, Martian crater Bond was named after George Phillips.

Physical characteristics

In the Bus–Binzel SMASS classification, Bondia is a B-type asteroid, a brighter variant of the common carbonaceous C-type asteroid.

Rotation period

In October 2018, a rotational lightcurve of Bondia was obtained from photometric observations by Mexican astronomers at the National Astronomical Observatory in San Pedro Mártir (OAN-SPM). Lightcurve analysis gave a well defined rotation period of Шаблон:Val hours with a brightness variation of Шаблон:Val magnitude (Шаблон:Small) and supersedes a previous observation by Szabó from 2016, who determined a period of at least Шаблон:Val hours and a low amplitude (Шаблон:Small).

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Bondia measures Шаблон:Val and Шаблон:Val kilometers in diameter and its surface has an albedo between Шаблон:Val and Шаблон:Val, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0857 and a diameter of 41.40 kilometers based on an absolute magnitude of 10.2. Alternative mean-diameter measurements published by the WISE team include (Шаблон:Val), (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val) with corresponding albedos of (Шаблон:Val), (Шаблон:Val), (Шаблон:Val) and (Шаблон:Val).

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Шаблон:AstDys
• Шаблон:JPL small body