Discovered by K. Reinmuth MPC designation 1732 Heike Discovered 9 March 1943 Discoverer Karl Wilhelm Reinmuth Asteroid group Asteroid belt | Discovery date 9 March 1943 Orbits Sun | |
Named after Heike Neckelgranddaughter ofAlfred Bohrmann Alternative names 1943 EY · 1934 LC1935 TD · 1938 FC1938 GB · 1950 NR11951 WW · 1960 ME1961 TU1 · 1966 QJ1971 QY1 · A906 FAA924 PB Discovery site Landessternwarte Heidelberg-Königstuhl Similar 1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia | ||
1732 Heike, provisional designation 1943 EY, is a stony Eoan asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 9 March 1943, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.
The S-type asteroid is a member of the Eos family. It orbits the Sun at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,913 days). Its orbit has an eccentricity of 0.11 and an inclination of 11° with respect to the ecliptic. First identified as A906 FA in 1906, Heike's first used observation was taken at Heidelberg in 1924, when it was identified as 1924 PB, extending the body's observation arc by 19 years prior to its official discovery observation.
In October 2010, a rotational light-curve of Heike was obtained from photometric observations at the Truman Observatory. It gave a well-defined rotation period of 4.742 hours with a brightness variation of 0.32 magnitude (U=3), superseding a previous period of 3.90 hours (U=2).
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 20.50 and 24.31 kilometers in diameter, and its surface has an albedo between 0.110 and 0.201. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.132 and a diameter of 24.17 kilometers based on an absolute magnitude of 10.9.
It was named after Heike Neckel, granddaughter of German astronomer Alfred Bohrmann (1904–2000), who was a colleague of the discoverer at Heidelberg. The asteroid 1635 Bohrmann bears his name. Naming citation was published before November 1977 (M.P.C. 3933).