| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 4 September 1951 |
| Designations | |
| (1823) Gliese | |
Named after | Wilhelm Gliese (German astronomer)[2] |
| 1951 RD · 1944 MC 1948 VH · 1950 BL 1950 DR · 1950 EF 1954 NE · 1970 EU2 1971 SE1 | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 68.36 yr (24,967 days) |
| Aphelion | 2.5268AU |
| Perihelion | 1.9244 AU |
| 2.2256 AU | |
| Eccentricity | 0.1353 |
| 3.32yr (1,213 days) | |
| 37.708° | |
| 0° 17m 48.48s / day | |
| Inclination | 2.8919° |
| 310.01° | |
| 296.68° | |
| Physical characteristics | |
| Dimensions | 8.19 km(calculated)[3] 8.439±0.324[4] 9.544±0.025 km[5] |
| 4.4864±0.0006h[a] 4.488±0.003 h[6] | |
| 0.1349±0.0152[5] 0.189±0.046[4] 0.24(assumed)[3] | |
| S[3][7] | |
| 12.55±0.49[7] · 12.6[1][3] · 12.9[5] | |
1823 Gliese, provisional designation1951 RD, is a stony Floraasteroid from the inner regions of theasteroid belt, approximately 8 kilometers in diameter. It was discovered on 4 September 1951, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany.[8] The asteroid was named after German astronomerWilhelm Gliese.[2]
TheS-type asteroid is a member of theFlora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in theinner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,213 days). Its orbit has aneccentricity of 0.14 and aninclination of 3° with respect to theecliptic.[1] The first unused observations date back to 1944 atJohannesburg Observatory, when it was identified as1944 MC. The first usedprecovery was taken at the discovering Heidelberg observatory in 1950, extending the asteroid'sobservation arc by one year prior to its official discovery.[8]
A rotationallightcurve of this asteroid was obtained from photometric observations made by Czech astronomerPetr Pravec at theOndřejov Observatory in August 2014. The lightcurve gave a well-definedrotation period of4.4864±0.0006 hours with a brightness variation of 0.27 inmagnitude (U=3).[a] One month later, in September 2014, a second lightcurve by American astronomerBrian Warner at his Palmer Divide Observatory, Colorado, gave a concurring period of4.488±0.003 hours with an amplitude of 0.23 in magnitude (U=3).[6]
According to the survey carried out by theNEOWISE mission of NASA's space-basedWide-field Infrared Survey Explorer, the asteroid measures 8.4 and 9.5 kilometers in diameter and its surface has analbedo of 0.189 and 0.135, respectively,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the largest member and namesake of this asteroid's orbital family – and calculates a diameter of 8.2 kilometers with anabsolute magnitude of 12.6.[3]
Thisminor planet was named after German astronomerWilhelm Gliese (1915–1993) at theAstronomisches Rechen-Institut. Gliese is widely known for having compiled about 1,000 stars located within 25 parsecs of Earth into theGliese Catalogue of Nearby Stars.[2] The officialnaming citation was published by theMinor Planet Center on 18 April 1977 (M.P.C. 4156).[9] Alarge number of Exoplanets derive their names form this star catalogue.
