1145 Robelmonte, provisional designation 1929 CC, 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.[16] Through a glitch in the naming process, the asteroid received the name "Robelmonte" instead of "Mimi" as originally intended by the discoverer.[2]
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 (1,378 days). Its orbit has an
eccentricity of 0.12 and an
inclination of 6
° with respect to the
ecliptic.[1] The asteroid was first identified as A915 RN 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.[16]
Physical characteristics
Robelmonte is an assumed stony
S-type asteroid,[3] 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 (Observadores de Asteroides – Asteroid Observers). Lightcurve analysis gave a
rotation period of 8.002 hours with a brightness variation of 0.13
magnitude (U=3-).[11] Previous observations gave a divergent period of 7.582, 9.01 and 21 hours, respectively (U=2/2/1).[10][12][13]
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.[3]
Naming
This
minor planet was named after
Robelmont, the birthplace of Belgian astronomer
Sylvain Arend (Robelmonte is the feminine form). Through an error, the names intended for
1127 Mimi (wife of Delporte) and 1145 Robelmonte (birthplace of Arend) had been switched, and each name had been proposed by the discoverer of the other asteroid. The official naming citation was mentioned in The Names of the Minor Planets by
Paul Herget in 1955 (H 107).[2]