| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 9 March 1943 |
| Designations | |
| (1732) Heike | |
Named after | Heike Neckel(granddaughter of astronomer Alfred Bohrmann)[2] |
| 1943 EY · 1934 LC 1935 TD · 1938 FC 1938 GB · 1950 NR1 1951 WW · 1960 ME 1961 TU1 · 1966 QJ 1971 QY1 · A906 FA A924 PB | |
| main-belt · Eos[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.22 yr (40,623 days) |
| Aphelion | 3.3482AU |
| Perihelion | 2.6793 AU |
| 3.0137 AU | |
| Eccentricity | 0.1110 |
| 5.23yr (1,911 days) | |
| 249.18° | |
| 0° 11m 18.24s / day | |
| Inclination | 10.776° |
| 155.63° | |
| 211.36° | |
| Physical characteristics | |
| Dimensions | 20.50±0.79 km[5] 22.378±0.235[6] 23.485±0.161 km[7] 24.06±4.2 km[8] 24.17 km(derived)[3] 24.31±1.45 km[9] |
| 3.90h[4] 4.742±0.013 h[10] | |
| 0.1108±0.052[8] 0.114±0.015[9] 0.1169±0.0116[7] 0.128±0.025[6] 0.1320(derived)[3] 0.201±0.040[5] | |
| LS[11] · S[3] | |
| 10.80[5] · 10.82±0.19[11] · 10.9[1][3] · 11.1[8][9][7] | |
1732 Heike, provisional designation1943 EY, is a stony Eoanasteroid from the outer region of theasteroid belt, approximately 24 kilometers in diameter.
It was discovered on 9 March 1943, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany, and named after Heike Neckel, the granddaughter of astronomerAlfred Bohrmann.[2][12]
TheS-type asteroid is a member of theEos family. It orbits the Sun in theouter main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,911 days). Its orbit has aneccentricity of 0.11 and aninclination of 11° with respect to theecliptic.[1]Heike was first identified asA906 FA at Heidelberg Observatory in 1906. The body's first used observation was also taken at Heidelberg in 1924, when it was identified as1924 PB, extending the body'sobservation arc by 19 years prior to its official discovery observation.[12]
In October 2010, a rotationallightcurve ofHeike was obtained from photometric observations at the Truman Observatory. It gave a well-definedrotation period of 4.742 hours with a brightness variation of 0.32magnitude (U=3),[10][13] superseding a previous period of 3.90 hours (U=2).[4]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, the asteroid measures between 20.50 and 24.31 kilometers in diameter, and its surface has analbedo between 0.110 and 0.201.[5][7][8][9] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.132 and a diameter of 24.17 kilometers with anabsolute magnitude of 10.9.[3]
Thisminor planet was named after Heike Neckel, granddaughter of German astronomerAlfred Bohrmann (1904–2000), who was a colleague of the discoverer at Heidelberg. The asteroid1635 Bohrmann bears his name.[2] The officialnaming citation was published by theMinor Planet Center on 20 February 1976 (M.P.C. 3933).[14]
