(provisional designation ) is a Mars-crossing asteroid and a binary candidate from inside the innermost region of the asteroid belt, approximately in diameter. It was discovered on 24 August 1987, by American astronomer Stephen Singer-Brewster at the Palomar Observatory in California. The likely spherical X-type asteroid has a rotation period of 3.1 hours. The suspected presence of a kilometer-sized minor-planet moon was announced in November 2000.
is a Mars-crossing asteroid, a member of the dynamically unstable group, located between the main belt and near-Earth populations, and crossing the orbit of Mars at 1.666 AU. It orbits the Sun inside the innermost region of the asteroid belt at a distance 1.5âÂÂ2.9 AU once every 3 years and 3 months (1,199 days; semi-major axis of 2.21 AU). Its orbit has an eccentricity of 0.31 and an inclination of 27ð with respect to the ecliptic.
The body's observation arc begins with a precovery published by the Digitized Sky Survey and taken at Palomar in May 1954, more than 33 years prior to its official discovery observation. It will pass from the main-belt asteroid 7 Iris on 3 September 2173.
This minor planet was numbered by the Minor Planet Center on 26 July 2000 (). As of 2018, it has not been named.
In the SDSS-based taxonomy and according to the survey conducted by Pan-STARRS, is an X-type asteroid. It has also been classified as a common, stony S-type asteroid.
In September 2010, a first rotational lightcurve of was obtained from photometric observations by Brian Skiff. Lightcurve analysis gave a rotation period of 3.068 hours and a brightness variation of 0.07 magnitude (). Within less than two weeks, follow-up observations by a large international collaboration of astronomers determined a refined period of hours with a low amplitude of 0.07 magnitude, indicating that the body has a spherical shape (). An alternative observation that gave a tentative period 9.709 hours received a poor quality rating ().
The photometric observations during September and October 2010 revealed that is a candidate for a synchronous binary asteroid with a minor-planet moon orbiting it every hours at an estimated average distance of . The findings were announced on 6 November 2009. The lightcurve indicated mutual occultation events, however, a conclusive solution for the orbit period was not obtained. The Johnston's archive estimates a diameter of 1.23 kilometer for the satellite, or 31% the size of its primary.
The international collaboration included Richard Durkee at the Shed of Science Observatory , Petr Pravec, Kamil Hornoch and Peter Kuà ¡nirák at Ondà Âejov Observatory, Donald Pray at Carbuncle Hill Observatory , David Higgins at Canberra , Jozef Világi and à  tefan Gajdoà ¡ at Modra Observatory, Judit Györgyey Ries at McDonald Observatory and Julian Oey at Leura Observatory , as well as astronomers at the Kharkiv Kharkov , Simeiz and Skalnate Pleso observatories.
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, measures 2.95 kilometers in diameter and its surface has an albedo of 0.268, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and derives a diameter of 3.04 kilometers based on an absolute magnitude of 14.99.