| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 22 September 1919 |
| Designations | |
| (2637) Bobrovnikoff | |
Named after | Nicholas T. Bobrovnikoff[1] (Russian-born astronomer) |
| A919 SB · 1953 TL 1963 RB · 1976 JB7 1980 TN3 | |
| main-belt[1][2] · (inner)[3] background[4] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 98.35yr (35,922 d) |
| Aphelion | 2.7846AU |
| Perihelion | 1.7257 AU |
| 2.2551 AU | |
| Eccentricity | 0.2348 |
| 3.39 yr (1,237 d) | |
| 41.979° | |
| 0° 17m 27.6s / day | |
| Inclination | 4.9312° |
| 356.13° | |
| 343.65° | |
| Physical characteristics | |
| 5.82±0.95 km[5] 5.97±1.05 km[6] 6.21±0.10 km[7] 6.919±0.094 km[8] 7.46 km(calculated)[3] | |
| 4.7939±0.0003 h[9] | |
| 0.20(assumed)[3] 0.2563±0.0191[8] 0.28±0.09[5] 0.316±0.061[7] 0.37±0.15[6] | |
| S(assumed)[3] | |
| 12.90[6][7][8] · 13.0[2][3] 13.31±0.39[10] · 13.40[5] | |
2637 Bobrovnikoff, provisional designationA919 SB, is a backgroundasteroid from the inner regions of theasteroid belt, approximately 6 kilometers (4 miles) in diameter. It was discovered on 22 September 1919, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in Heidelberg, Germany.[1] The presumed sphericalS-type asteroid has arotation period of 4.79 hours.[3] It is named after astronomerNicholas Bobrovnikoff, who was the director of thePerkins Observatory in Ohio, United States.[1]
Bobrovnikoff is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theinner asteroid belt at a distance of 1.7–2.8 AU once every 3 years and 5 months (1,237 days;semi-major axis of 2.26 AU). Its orbit has aneccentricity of 0.23 and aninclination of 5° with respect to theecliptic.[2] The body'sobservation arc begins at Heidelberg in 1919, three days after its official discovery observation.[1]
Bobrovnikoff is an assumed, stonyS-type asteroid.[3]
In September 2007, a rotationallightcurve ofBobrovnikoff was obtained fromphotometric observations by French and Swiss astronomersPierre Antonini,Raoul Behrend, andAlain Klotz. Lightcurve analysis gave a well-definedrotation period of 4.7939 hours with a brightness amplitude of 0.13magnitude, indicative of a rather spherical shape (U=3).[9]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Bobrovnikoff measures between 5.82 and 6.919 kilometers in diameter and its surface has analbedo between 0.2563 and 0.37.[5][6][7][8]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo forstony asteroids of 0.20 and calculates a larger diameter of 7.46 kilometers based on anabsolute magnitude of 13.0.[3]
Thisminor planet was named after Russian-borncometaryspectroscopist Nicholas Theodore Bobrovnikoff (1896–1988), known for his research on the 1910-apparition ofHalley's Comet. From 1934 to 1951, he was the director of thePerkins Observatory in Delaware, Ohio. The naming was proposed by the director ofMinor Planet Center,Brian G. Marsden, and the official citation was published on 24 July 1983 (M.P.C. 8064).[1][11]
