| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 15 August 1939 |
| Designations | |
| (1739) Meyermann | |
Named after | Bruno Meyermann (German astronomer)[2] |
| 1939 PF · 1929 TB1 1935 GN · 1952 HN3 1953 XO1 · 1963 TG | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.57 yr (31,984 days) |
| Aphelion | 2.5407AU |
| Perihelion | 1.9812 AU |
| 2.2610 AU | |
| Eccentricity | 0.1237 |
| 3.40yr (1,242 days) | |
| 26.730° | |
| 0° 17m 23.64s / day | |
| Inclination | 3.4093° |
| 203.35° | |
| 82.116° | |
| Physical characteristics | |
| Dimensions | 6.62±0.79 km[4] 7.47 km(calculated)[3] 7.858±0.124[5] 8.688±0.063 km[6] |
| 2.8212±0.0002h[a] 2.8219±0.0002 h[b] | |
| 0.1961±0.0376[6] 0.24(assumed)[3] 0.254±0.015[5] 0.336±0.116[4] | |
| S[3] | |
| 12.63±0.27[7] · 12.7[4][6] · 12.8[1][3] | |
1739 Meyermann, provisional designation1939 PF, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 7.5 kilometers in diameter. It was discovered by German astronomerKarl Reinmuth atHeidelberg Observatory on 15 August 1939.[8] It was later named in memory of astronomerBruno Meyermann.[2]
Meyermann is a member of theFlora family, a large group ofS-type asteroids in the inner main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,242 days). Its orbit has aneccentricity of 0.12 and aninclination of 3° with respect to theecliptic.[1]Meyermann was first identified as1929 TB1 atLowell Observatory in 1929, extending the body'sobservation arc by 10 years prior to its official discovery observation at Heidelberg.[8]
Two rotationallightcurves ofMeyermann were obtained from photometric observations taken by Czech astronomerPetr Pravec at Ondřejov Observatory in 2007 and 2014. They gave arotation period of 2.8212 and 2.8219 hours with a brightness variation of 0.12 and 0.17magnitude, respectively (U=3/3).[a][b]
According to the refitted 2014-results from the survey carried out by theWide-field Infrared Survey Explorer with itsNEOWISE missions,Meyermann measures 7.858 kilometers in diameter, and its surface has analbedo of 0.254.[5] TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from8 Flora, the largest member and namesake of its family – and calculates a diameter of 7.47 kilometers based on anabsolute magnitude of 12.8.[3]
Thisminor planet was named in memory of Bruno Meyermann (1876–1963), a classical astronomer and academic teacher atGöttingen Observatory in Lower Saxony, Germany. His fields of interest includedpolar motion andrelativistic effects.[2] The officialnaming citation was published by theMinor Planet Center on 18 April 1977 (M.P.C. 4155).[9]
