Discovered by K. Reinmuth MPC designation 1825 Klare Discovered 31 August 1954 Orbits Sun Asteroid group Asteroid belt | Discovery date 31 August 1954 Minor planet category main-belt · (middle) Absolute magnitude 11.8 Discoverer Karl Wilhelm Reinmuth | |
Named after Gerhard Klare (astronomer) Alternative names 1954 QH · 1934 CH1952 DW2 · 1954 SB1954 SF · 1954 UF11969 AV Discovery site Landessternwarte Heidelberg-Königstuhl Similar 1862 Apollo, Sun, 1419 Danzig, 1056 Azalea, 1111 Reinmuthia | ||
1825 Klare, provisional designation 1954 QH, is an asteroid from the middle region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 31 August 1954, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany.
The presumably stony asteroid orbits the Sun at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,600 days). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic. First identified as 1934 CH at Uccle Observatory in 1934, Klare's observation arc begins 20 years prior to its official discovery observation.
Klare has been the subject of multiple photometric light-curve studies, which gave a well-determined rotation period between 4.741 and 4.744 hours with a brightness variation between 0.70 and 0.90 magnitude (U=3/n.a.). Measurements have also been used as the basis for generating a three-dimensional model of its shape. The Collaborative Asteroid Lightcurve Link (CALL) adopts a period 4.744 hours with an amplitude of 0.70 magnitude (U=3).
According to the survey carried out by the Japanese Akari satellite, Klare measures 14.69 kilometers in diameter, and its surface has an albedo of 0.167, while CALL assumes an albedo of 0.10 – a compromise value for asteroids with an semi-major axis between 2.6 and 2.7 AU, for which neither a S (0.20) nor a C (0.057) type has been determined – and calculates a diameter of 19.21 kilometers based on an absolute magnitude of 11.7.
Klare was named after Gerhard Klare (b. 1932), an observing astronomer at Heidelberg Observatory since 1960, whose fields of interest include minor planets. He is also known for his numerous contributions in the yearbook series "Reviews in Modern Astronomy" of the Astronomische Gesellschaft. Naming citation was published before November 1977 (M.P.C. 4156).