_Klare.png) Shape model ofKlare from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 31 August 1954 |
| Designations | |
| (1825) Klare | |
Named after | Gerhard Klare(German astronomer)[2] |
| 1954 QH · 1934 CH 1952 DW2 · 1954 SB 1954 SF · 1954 UF1 1969 AV | |
| main-belt · (middle)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 83.12 yr (30,360 days) |
| Aphelion | 2.9839AU |
| Perihelion | 2.3702 AU |
| 2.6771 AU | |
| Eccentricity | 0.1146 |
| 4.38yr (1,600 days) | |
| 71.010° | |
| 0° 13m 30s / day | |
| Inclination | 4.0342° |
| 288.67° | |
| 142.57° | |
| Physical characteristics | |
| Dimensions | 14.69±0.82 km[4] 19.21 km(calculated)[3] |
| 4.7410±0.0001h[a] 4.74173±0.00007 h[5] 4.7421±0.0001 h[6] 4.74288±0.00005 h[7] 4.742885±0.000001 h[8] 4.7429±0.0003 h[9] 4.7431±0.0001 h[10] 4.744 h[11] | |
| 0.10(assumed)[3] 0.167±0.021[4] | |
| S/C[3] | |
| 11.7[1][3] · 11.80[4] · 11.91±0.24[12] | |
1825 Klare (prov. designation:1954 QH) is abackground asteroid from the central region of theasteroid belt, approximately 15 kilometers in diameter. It was discovered on 31 August 1954, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany.[13] The asteroid was named after Heidelberg astronomerGerhard Klare.[2]
The presumablystony asteroid orbits the Sun in thecentral main-belt at a distance of 2.4–3.0 AU once every 4 years and 5 months (1,600 days). Its orbit has aneccentricity of 0.11 and aninclination of 4° with respect to theecliptic.[1] First identified as1934 CH atUccle Observatory in 1934,Klare'sobservation arc begins 20 years prior to its official discovery observation.[13]
Klare was named after Gerhard Klare (born 1932), anobserving astronomer at Heidelberg Observatory since 1960, whose fields of interest include minor planets.[2] He is also known for his numerous contributions in the yearbook series "Reviews in Modern Astronomy" of theAstronomische Gesellschaft. The officialnaming citation was published by theMinor Planet Center on 18 April 1977 (M.P.C. 4156).[14]
Klare has been the subject of multiple photometriclightcurve studies, which gave a well-determinedrotation period between 4.741 and 4.744 hours with a brightness variation between 0.70 and 0.90magnitude (U=3/n.a.).[5][7][8][9][10][11] Measurements have also been used as the basis for generating a three-dimensional model of its shape.[6] TheCollaborative Asteroid Lightcurve Link (CALL) adopts a period 4.744 hours with an amplitude of 0.70 magnitude (U=3).[3]
According to the survey carried out by the JapaneseAkari satellite,Klare measures 14.69 kilometers in diameter, and its surface has analbedo of 0.167,[4] while CALL assumes an albedo of 0.10 – a compromise value for asteroids with a semi-major axis between 2.6 and 2.7 AU, for which neither aS (0.20) nor aC (0.057) type has been determined – and calculates a diameter of 19.21 kilometers with anabsolute magnitude of 11.7.[3]
