| Discovered by CSS MPC designation (50719) 2000 EG140 Minor planet category main-belt · Eunomia Discovered 1 March 2000 Discovery site Mount Lemmon Observatory Discoverer Catalina Sky Survey | Discovery date 1 March 2000 Alternative names 2000 EG140 · 2001 MV3 Observation arc 17.54 yr (6,406 days) Asteroid family Eunomia family Asteroid group Asteroid belt | |
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(50719) 2000 EG140 is a stony Eunomian asteroid and exceptionally slow rotator from the middle region of the asteroid belt, approximately 3.3 kilometers in diameter. It was discovered on 1 March 2000, by astronomers of the U.S. Catalina Sky Survey, at Mount Lemmon Observatory, Arizona.
The stony S-type asteroid is a member of the Eunomia family, the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.2–2.9 AU once every 4 years and 2 months (1,517 days). Its orbit has an eccentricity of 0.14 and an inclination of 14° with respect to the ecliptic. The first precovery was taken at Lowell Observatory (LONEOS) in 1998, extending the asteroid's observation arc by 2 years prior to its discovery.
In August 2010, a rotational light-curve was obtained for this asteroid from photometric observations at the U.S. Palomar Transient Factory (PTF) in California. It gave a rotation period of 1256 hours with a brightness variation of 0.42 magnitude (U=2). This makes the asteroid the 5th slowest rotating minor planet known to exist.
According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 3.3 kilometers in diameter and its surface has an albedo of 0.37, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 3.4 kilometers, based on an absolute magnitude of 14.65.