| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 12 March 1931 |
| Designations | |
| (1308) Halleria | |
Named after | Albrecht von Haller[2] (Swiss physiologist) |
| 1931 EB · 1933 SP 1936 FU1 · 1938 SO1 1938 SP1 · 1953 TT 1963 VA · A901 DB | |
| main-belt · (outer)[3] Charis[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.76 yr (42,645 days) |
| Aphelion | 2.9438AU |
| Perihelion | 2.8738 AU |
| 2.9088 AU | |
| Eccentricity | 0.0120 |
| 4.96yr (1,812 days) | |
| 173.29° | |
| 0° 11m 55.32s / day | |
| Inclination | 5.5766° |
| 354.14° | |
| 164.00° | |
| Physical characteristics | |
| Dimensions | 39.33±12.48 km[5] 41.87±10.07 km[6] 43.13 km(derived)[3] 43.16±1.4 km[7] 45.05±0.57 km[8] 46.951±0.275 km[9] 50.046±0.301 km[10] |
| 6.013h[a] 6.026±0.002 h[11] 6.028±0.004 h[11] | |
| 0.0338±0.0116[10] 0.038±0.009[9] 0.0415(derived)[3] 0.042±0.001[8] 0.0454±0.003[7] 0.05±0.06[6] 0.05±0.07[5] | |
| C(assumed)[3] | |
| 10.80[5][7][8][10] · 10.9[1][3] · 10.95[6] · 10.97±0.28[12] | |
1308 Halleria, provisional designation1931 EB, is a carbonaceous Charisasteroid from the outer regions of theasteroid belt, approximately 43 kilometers in diameter. It was discovered on 12 March 1931, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory.[13] The asteroid was named afterAlbrecht von Haller a Swiss physician, botanist and poet.[2]
Halleria belongs to the carbonaceousCharis family (616),[4] afamily of more than 800 members, named after its parent body627 Charis.[14]: 23 It orbits the Sun in theouter main-belt at a distance of 2.87–2.94 AU once every 4 years and 12 months (1,812 days;semi-major axis 2.91 AU). Its orbit has aneccentricity of 0.01 and aninclination of 6° with respect to theecliptic.[1]
The asteroid was first observed asA901 DB at Heidelberg Observatory in February 1901. The body'sobservation arc begins with its official discovery observation in March 1931.[13]
Halleria is an assumed carbonaceousC-type asteroid,[3] which agrees with the overallspectral type for members of theCharis family.[14]: 23
Between 2005 and 2011, three rotationallightcurves ofHalleria were obtained from photometric observations byDonald Pray,René Roy, andPierre Antonini (U=3/3-/3).[11][a] Lightcurve analysis gave a consolidatedrotation period of 6.028 hours with a brightness amplitude between 0.14 and 0.17magnitude.[3]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Halleria measures between 39.33 and 50.046 kilometers in diameter and its surface has analbedo between 0.0338 and 0.05.[5][6][7][8][9][10]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0415 and a diameter of 43.13 kilometers based on anabsolute magnitude of 10.9.[3]
Thisminor planet was named forAlbrecht von Haller (1708–1777) a Swiss physician, botanist and poet. The naming took place during the 1935 meeting of theAstronomische Gesellschaft in Bern, Switzerland. The author of theDictionary of Minor Planet Names learned about the naming circumstances from Dutch astronomerIngrid van Houten-Groeneveld.[2]
