2637 Bobrovnikoff
2637 Bobrovnikoff, provisional designation, is a background asteroid from the inner regions of the asteroid belt, approximately in diameter. It was discovered on 22 September 1919, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The presumed spherical S-type asteroid has a rotation period of 4.79 hours. It is named after astronomer Nicholas Bobrovnikoff, who was the director of the Perkins Observatory in Ohio, United States.
Orbit and classification
Bobrovnikoff is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.7–2.8 AU once every 3 years and 5 months. Its orbit has an eccentricity of 0.23 and an inclination of 5° with respect to the ecliptic. The body's observation arc begins at Heidelberg in 1919, three days after its official discovery observation.Physical characteristics
Bobrovnikoff is an assumed, stony S-type asteroid.Rotation period
In September 2007, a rotational lightcurve of Bobrovnikoff was obtained from photometric observations by French and Swiss astronomers Pierre Antonini, Raoul Behrend, and Alain Klotz. Lightcurve analysis gave a well-defined rotation period of 4.7939 hours with a brightness amplitude of 0.13 magnitude, indicative of a rather spherical shape.Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Bobrovnikoff measures between 5.82 and 6.919 kilometers in diameter and its surface has an albedo between 0.2563 and 0.37.The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a larger diameter of 7.46 kilometers based on an absolute magnitude of 13.0.