7958 Leakey
7958 Leakey, provisional designation, is a Hungaria asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 3 kilometers in diameter.
It was discovered on 5 June 1994, by American astronomer-couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California, United States. Its minor-planet moon was discovered in 2012. The asteroid was named after the members of the Leakey family: Mary, Louis and Richard.
Orbit and classification
Leakey is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun in the inner main-belt at a distance of 1.7–2.0 AU once every 2 years and 7 months. Its orbit has an eccentricity of 0.08 and an inclination of 22° with respect to the ecliptic.Physical characteristics
Leakey is an assumed E-type asteroid.Lightcurves
In 2012, and 2015, several lightcurves of Leakey were obtained by astronomers Brian Warner, Robert Stephens and Daniel Coley. Lightcurve analysis gave a concurring and well-defined rotation period of 2.35 hours with a brightness variation between 0.19 and 0.22 magnitude.Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Leakey measures 2.94 kilometers in diameter and its surface has a high albedo of 0.468.The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 – a compromise value between 0.4 and 0.2, corresponding to the Hungaria asteroids both as family and orbital group – and calculates a diameter of 3.35 kilometers based on an absolute magnitude of 14.3.
Moon
The 2012-photometric lightcurve observation also revealed, that Leakey is a synchronous binary asteroid with a minor-planet moon orbiting it every 50.24 hours.It is likely that the secondary body is tidally locked, which means that its rotation is synchronous with its orbital period. Based on only two observations at the Palmer Divide Observatory, it is tentatively estimated that the size-ratio of the binary system is, which would give a 1-kilometer diameter for the satellite.