• Source: (7563) 1988 BC

(7563) 1988 BC (provisional designation 1988 BC) is a background asteroid from the central region of the asteroid belt, approximately 16 kilometers (10 miles) in diameter. It was discovered on 16 January 1988, by Japanese amateur astronomer Takuo Kojima at the YGCO Chiyoda Station in the Kantō region of Japan. The asteroid has a rotation period of 6.5 hours.




Classification and orbit


1988 BC is non-family asteroid of the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.1–3.3 AU once every 4 years and 5 months (1,602 days; semi-major axis of 2.68 AU). Its orbit has an eccentricity of 0.23 and an inclination of 13° with respect to the ecliptic.




Naming


As of 2018, 1988 BC remains unnamed.




Physical characteristics






= Lightcurves

=
In January 2010, a rotational lightcurve of 1988 BC was obtained from photometric observations by Pierre Antonini at the Bédoin Observatory (132) in southeastern France. Lightcurve analysis gave a rotation period of 6.539±0.005 hours with a brightness variation of 0.30 in magnitude (U=3). A previous 2006-observation by American astronomer Brian Warner at his Palmer Divide Observatory in Colorado gave a period of 6.510 hours and an amplitude of 0.24 magnitude (U=3-).




= 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, the asteroid has a low albedo of between 0.048 and 0.08, with a diameter between 12.04 and 17.27 kilometers.
Despite the results from the space-based observations, the Collaborative Asteroid Lightcurve Link assumes a higher albedo of 0.10 – a compromise between the stony and carbonaceous asteroid populations from the inner and outer main-belt, respectively – and hence calculates a smaller diameter of 12.1 kilometers with an absolute magnitude of 12.7.




References






External links


Lightcurve plot of (7563) 1988 BC, Palmer Divide Observatory, B. D. Warner (2006)
Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
(7563) 1988 BC at AstDyS-2, Asteroids—Dynamic Site
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
(7563) 1988 BC at the JPL Small-Body Database

Kata Kunci Pencarian:

• (7563) 1988 BC
• Takuo Kojima
• List of minor planets: 7001–8000
• Wildlife of Iraq
• Spironolactone
• Restriction enzyme
• List of solar eclipses in the 19th century
• Renaissance in Scotland
• Solar Saros 146