The official naming citation was published by the Minor Planet Center on ( M.P.C. It is one of the best-known artificial intelligence characters in modern movies. HAL stands for Heuristically programmed Algorithmic computer. Clarke's novel and Stanley Kubrick's movie 2001: A Space Odyssey (1968). This minor planet was named after the fictional supercomputer Hal 9000, featured in both Arthur C. CALL assumes an albedo of 0.24 – derived from 8 Flora, the Flora family's parent body – and calculates a diameter of 4.11 kilometers based on an absolute magnitude of 14.1. Diameter and albedo Īccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hal measures between 3.61 and 4.134 kilometers in diameter and its surface has an albedo between 0.26 and 0.375. The result, however, is considered of poor quality by CALL ( U=1). In addition, the body's high brightness amplitude is indicative of a non-spherical shape.Īn alternative measurement by French amateur astronomers Pierre Antonini and René Roy gave a much shorter period of 22.68 hours. This makes Hal one of the slowest rotators known to exist. Lightcurve analysis gave an exceptionally long rotation period of 908 hours with a high brightness variation of 0.9 magnitude ( U=2+). In August 2008, a rotational lightcurve of Hal was obtained from photometric observations by Slovak astronomers Adrián Galád, Jozef Világi, Leonard Kornoš and Štefan Gajdoš at Modra Observatory. Hal is an assumed stony S-type asteroid, based on the Collaborative Asteroid Lightcurve Link 's (CALL) classification into the Flora family. The body's observation arc begins with its official discovery observation at Anderson Mesa in May 1981. The asteroid was first observed as 1975 VH 3 at Crimea–Nauchnij in November 1975. Its orbit has an eccentricity of 0.21 and an inclination of 6 ° with respect to the ecliptic. Hal orbits the Sun in the inner asteroid belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,216 days semi-major axis of 2.23 AU). Based on osculating Keplerian orbital elements, the asteroid has also been classified as a member of the Flora family ( 402), a giant asteroid family and the largest family of stony asteroids in the main-belt. Hal is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It was named after the homicidal supercomputer HAL 9000, featured in the 1968 film 2001: A Space Odyssey. The likely elongated S-type asteroid has an exceptionally long rotation period of 908 hours. ![]() It was discovered on, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. 9000 Hal, provisional designation 1981 JO, is a stony background asteroid and slow rotator from the inner regions of the asteroid belt, approximately 4 kilometers (2.5 miles) in diameter.
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