1145 Robelmonte
1145 Robelmonte, provisional designation, is a Vestian asteroid from the inner regions of the asteroid belt, approximately 23 kilometers in diameter.
It was discovered on 3 February 1929, by Belgian astronomer Eugène Delporte at the Royal [Observatory of Belgium] in Uccle. Through a glitch in the naming process, the asteroid received the name "Robelmonte" instead of "Mimi" as originally intended by the discoverer.
Orbit and classification
Robelmonte is a member of the Vesta family, the main-belt's second-largest asteroid family by number of members. Vestian asteroids have a composition akin to the HED meteorites and are thought to have originated deep within 4 Vesta's crust, possibly from Rheasilvia, a large impact crater on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision. Vesta is the main belt's second-largest and second-most-massive body after Ceres.Robelmonte orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 9 months. Its orbit has an eccentricity of 0.12 and an inclination of 6° with respect to the ecliptic. The asteroid was first identified as at Simeiz Observatory in September 1915. Its observation arc begins at Algiers Observatory in August 1930, more than a year after its official discovery observation at Uccle.
Physical characteristics
Robelmonte is an assumed stony S-type asteroid, despite its relatively low albedo.Rotation period
In March 2016, the best-rated rotational lightcurve of Robelmonte was obtained from photometric observations by the Spanish amateur astronomer group OBAS. Lightcurve analysis gave a rotation period of 8.002 hours with a brightness variation of 0.13 magnitude. Previous observations gave a divergent period of 7.582, 9.01 and 21 hours, respectively.Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Robelmonte measures between 18.85 and 24.757 kilometers in diameter and its surface has an albedo between 0.1046 and 0.16.The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0994 and a diameter of 23.16 kilometers based on an absolute magnitude of 11.3.