| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 6 October 1931 |
| Designations | |
| (1205) Ebella | |
Named after | Martin Ebell (German astronomer)[2] |
| 1931 TB1 · 1970 JT | |
| main-belt · (middle) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.48 yr (31,221 days) |
| Aphelion | 3.2287AU |
| Perihelion | 1.8411 AU |
| 2.5349 AU | |
| Eccentricity | 0.2737 |
| 4.04yr (1,474 days) | |
| 103.87° | |
| 0° 14m 39.12s / day | |
| Inclination | 8.8616° |
| 23.083° | |
| 349.24° | |
| Physical characteristics | |
| Dimensions | 5.474±0.283 km[3] 6.0 km(est. at0.20)[4] |
| 0.214±0.026[3] | |
| 13.5[1] | |
1205 Ebella (provisional designation1931 TB1) is a relatively eccentricasteroid from the central regions of theasteroid belt, approximately 5.5 kilometers in diameter. It was discovered by astronomerKarl Reinmuth atHeidelberg Observatory on 6 October 1931. The asteroid was named after German astronomer Martin Ebell.[5]
Ebella orbits the Sun in thecentral main-belt at a distance of 1.8–3.2 AU once every 4.04 years (1,474 days). Its orbit has aneccentricity of 0.27 and aninclination of 9° with respect to theecliptic.[1] As noprecoveries were taken and no prior identifications were made, the asteroid'sobservation arc begins at Heidelberg with its official discovery observation.[5]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, Ebella measures 5.474 kilometers in diameter and its surface has analbedo of 0.214, which is typical for stonyS-type asteroids.[3]
Based on a generic magnitude-to-diameter conversion, it measures 6.0 kilometers in diameter using anabsolute magnitude of 13.50 with an assumed albedo of 0.20.[4]
As of 2017, no rotationallightcurve of Ebella has been obtained from photometric observations. The asteroid'srotation period, poles and shape still remain unknown.[1][6]
Thisminor planet was named after Carl Wilhelm Ludwig Martin Ebell (1871–1944) an astronomer from Neuruppin, Germany, who was on the editorial team of the renowned astronomical journalAstronomische Nachrichten. The official naming citation was published byPaul Herget inThe Names of the Minor Planets in 1955 (H 112).[2]
