(10115) 1992 SK

Classification and orbit

The asteroid orbits the Sun at a distance of 0.8–1.7 AU once every 17 months (509 days). Its orbit has an eccentricity of 0.32 and an inclination of 15° with respect to the ecliptic. Its Earth minimum orbit intersection distance is 0.0449 AU. This makes the body a potentially hazardous asteroid, because its MOID is less than 0.05 AU and its diameter is greater than 150 meters. The first precovery was obtained at Palomar Observatory in 1953, extending the asteroid's observation arc by 39 years prior to its discovery.

Physical characteristics

In the SMASS classification, is characterized as a common stony S-type asteroid.

Rotation period

Several rotational lightcurves form photometric observations have been obtained for this body. In 1999, Czech astronomer Petr Pravec constructed a lightcurve, that rendered a rotation period of hours and a brightness variation of 0.72 in magnitude ().

In March 2006, observations by astronomer David Polishook from the ground-based Wise Observatory, Israel, gave a rotation period of and amplitude of 0.70 mag (), and in November 2011, American astronomer Brian Warner at the Palmer Divide Observatory, Colorado, obtained the first well-defined period of hours with an amplitude of 0.50 mag ().

The rotation period of 1992 SK is slowly accelerating due to the YORP effect.

Diameter and albedo

According to the surveys carried out by NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 1.0 and 0.94 kilometers in diameter and its surface has an albedo of 0.28 to 0.32, respectively. The ExploreNEOs project finds an albedo of 0.34, with a diameter of 0.9 kilometers, and the Collaborative Asteroid Lightcurve Link calculates a diameter of 1.18 kilometers based on an assumed standard albedo for stony asteroids of 0.20 and an absolute magnitude of 17.0.

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 2 March 1999. , it has not been named.

Notes

References

References

1. (2022). "Rotation acceleration of asteroids (10115) 1992 SK, (1685) Toro, and (1620) Geographos due to the YORP effect". Astronomy & Astrophysics.