| Discovery[1] | |
|---|---|
| Discovered by | A. Mrkos |
| Discovery site | Kleť Obs. |
| Discovery date | 2 September 1984 |
| Designations | |
| (3141) Buchar | |
Named after | Emil Buchar[1] (Czech astronomer) |
| 1984 RH · 1952 PE 1952 RQ · 1953 UF 1953 VK2 · 1977 NM 1977 OE · 1979 YW9 A905 CE | |
| main-belt · (outer)[2][3] background[4] · Cybele | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.21yr (41,350 d) |
| Aphelion | 3.6579AU |
| Perihelion | 3.1382 AU |
| 3.3980 AU | |
| Eccentricity | 0.0765 |
| 6.26 yr (2,288 d) | |
| 10.002° | |
| 0° 9m 26.28s / day | |
| Inclination | 10.997° |
| 321.13° | |
| 152.62° | |
| Physical characteristics | |
| 35.91 km(derived)[3] 36.05±2.2 km[5] 40.13±0.87 km[6] | |
| 11.41±0.01 h[7] | |
| 0.0656(derived)[3] 0.069±0.003[6] 0.0858±0.012[5] | |
| D(S3OS2)[8] C(assumed)[3] | |
| 10.50[5][6] 10.8[2][3] | |
3141 Buchar, provisional designation1984 RH, is a dark Cybeleasteroid from the outermost region of theasteroid belt, approximately 36 kilometers (22 miles) in diameter. It was discovered on 2 September 1984, by Czech astronomerAntonín Mrkos at theKleť Observatory.[1] TheD-type asteroid has arotation period of 11.4 hours.[3] It was named in memory of Czech astronomerEmil Buchar.[1]
Buchar is located in the dynamical region of theCybele asteroids. It is a non-family asteroid from the main belt'sbackground population.[4] It orbits the Sun in theoutermost asteroid belt at a distance of 3.1–3.7 AU once every 6 years and 3 months (2,288 days;semi-major axis of 3.4 AU). Its orbit has aneccentricity of 0.08 and aninclination of 11° with respect to theecliptic.[2] In February 1905, the asteroid was first observed asA905 CE atHeidelberg Observatory, where the body'sobservation arc begins with its observation as1952 RQ in September 1952, or 32 years prior to its official discovery observation at Klet.[1]
Buchar has been characterized as darkD-type asteroid in both the Tholen-like and Bus–Binzel-like taxonomy of theSmall Solar System Objects Spectroscopic Survey (S3OS2).[8] It is also an assumedC-type asteroid.[3]
In November 2004, a rotationallightcurve ofBuchar was obtained fromphotometric observations by French amateur astronomerLaurent Bernasconi. Lightcurve analysis gave arotation period of 11.41 hours with a brightness amplitude of 0.47magnitude (U=2+).[7]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS and the JapaneseAkari satellite,Buchar measures between 36.05 and 40.13 kilometers in diameter and its surface has analbedo between 0.069 and 0.0858.[5][6] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0656 and a diameter of 35.91 kilometers based on anabsolute magnitude of 10.8.[3]
Thisminor planet was named in memory of Czech astronomerEmil Buchar (1901–1979), discoverer of asteroid1055 Tynka and one of the pioneers ofsatellite geodesy. He was a professor of astronomy and geodesy atCzech Technical University in Prague.[1] The official naming citation was published by theMinor Planet Center on 29 November 1993 (M.P.C. 22828).[9]
