_Masaryk.png) Shape model ofMasaryk from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | L. Kohoutek |
| Discovery site | Bergedorf Obs. |
| Discovery date | 26 October 1971 |
| Designations | |
| (1841) Masaryk | |
Named after | Tomáš Garrigue Masaryk(Czechoslovak President)[2] |
| 1971 UO1 · 1936 FW 1955 DE · 1959 VJ 1968 FG · 1970 QN | |
| main-belt · (outer)[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.02 yr (29,591 days) |
| Aphelion | 3.7629AU |
| Perihelion | 3.0796 AU |
| 3.4213 AU | |
| Eccentricity | 0.0999 |
| 6.33yr (2,311 days) | |
| 313.50° | |
| 0° 9m 20.52s / day | |
| Inclination | 2.6203° |
| 45.323° | |
| 119.95° | |
| Physical characteristics | |
| Dimensions | 38.642±0.544 km[3] 40.240±0.504[4] 43.77±0.83 km[5] 46.04 km(derived)[6] 46.07±2.5 km[7] |
| 7.53±0.04h[8] 7.54301±0.00001 h[9] | |
| 0.0364(derived)[6] 0.0398±0.005[7] 0.045±0.002[5] 0.052±0.005[4] 0.0567±0.0036[3] | |
| P[3] · CX[10] · C[6] | |
| 10.8[3][5][7] · 10.9[1][6] · 10.94±0.19[10] | |
1841 Masaryk (prov. designation:1971 UO1) is a carbonaceousbackground asteroid from the outer region of theasteroid belt, approximately 46 kilometers in diameter. It was discovered on 26 October 1971, by Czech astronomerLuboš Kohoutek atBergedorf Observatory in Hamburg, Germany.[11] The asteroid was named after the first President ofCzechoslovakia,Tomáš Garrigue Masaryk.[2]
Masaryk orbits the Sun in theouter main-belt at a distance of 3.1–3.8 AU once every 6 years and 4 months (2,311 days). Its orbit has aneccentricity of 0.10 and aninclination of 3° with respect to theecliptic.[1] First identified as1936 FW atUccle Observatory,Masaryk's first used observation was taken atGoethe Link Observatory in 1955, extending the body'sobservation arc by 16 years prior to its official discovery observation.[11]
Thisminor planet was named in honor of the first president of the independent Czechoslovak Republic,Tomáš Garrigue Masaryk (1850–1937), statesman, philosopher and known for his humanistic ideas.[2] The officialnaming citation was published by theMinor Planet Center on 20 December 1974 (M.P.C. 3757).[12]
Thecarbonaceous asteroid is characterized as a (darker)P-type and as a transitional CX-type byNEOWISE andPanSTARRS, respectively.[3][10]
In April 2006, a rotationallightcurve ofMasaryk was obtained from photometric observations made by French amateur astronomerPierre Antonini. It gave arotation period of 7.53 hours with a brightness variation of 0.52magnitude (U=2+).[8] The result agrees with a lightcurve published in March 2016, using sparse-in-time photometry data from the Lowell Photometric Database (U=n.a.).[9]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Masaryk measures between 38.6 and 46.1 kilometers in diameter, and its surface has analbedo between 0.039 and 0.057.[3][4][5][7] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.036 and a diameter of 46.0 kilometers with anabsolute magnitude of 10.9.[6]
