Discovered by E. Delporte MPC designation 1170 Siva Alternative names 1930 SQ Discovered 29 September 1930 Argument of perihelion 59.322° Discoverer Eugène Joseph Delporte | Discovery date 29 September 1930 Named after Shiva (Hindu Deity) Minor planet category Mars-crosser Inclination 22.186° Orbits Sun Asteroid group Mars-crosser asteroid | |
Discovery site Royal Observatory of Belgium | ||
S s gunver ryberg b1 1170 siva bare bones cntrt006
1170 Siva, provisional designation 1930 SQ, is a stony asteroid and large Mars-crosser from the innermost regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 29 September 1930, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium.
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- S s gunver ryberg b1 1170 siva bare bones cntrt006
- S s gunver ryberg 1170 siva bare bones cntrt006
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In the Tholen taxonomy, Siva is a stony S-type asteroid. It orbits the Sun at a distance of 1.6–3.0 AU once every 3 years and 7 months (1,296 days). Its orbit has an eccentricity of 0.30 and an inclination of 22° with respect to the ecliptic. Siva was first observed at the Japanese Kwasan Observatory, 3 days prior to is discovery. The body's observation arc begins at Uccle, two weeks after its official discovery observation.
Only fragmentary light-curves of Siva have been obtained since 2001. They gave a rotation period between 3.5 and 5.22 hours with an small change in brightness of 0.04 to 0.1 magnitude (U=1/n.a./1). As of 2017, no secure period has been published.
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Siva measures between 7.68 and 12.13 kilometers in diameter, and its surface has an albedo between 0.128 and 0.40. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.1751 and a diameter of 10.37 kilometers with an absolute magnitude of 12.43. Siva belongs to the brightest known Mars-crossers.
This minor planet is named after Shiva, a Hindu Deity often depicted with a third eye on his forehead and a with a snake around his neck. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 109).