| Discovery[1] | |
|---|---|
| Discovered by | L. Brožek |
| Discovery site | Kleť Obs. |
| Discovery date | 30 August 1979 |
| Designations | |
| (2613) Plzeň | |
Named after | Plzeň(Czech city)[2] |
| 1979 QE · 1969 XA | |
| main-belt · (outer) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 47.16 yr (17,224 days) |
| Aphelion | 3.1789AU |
| Perihelion | 2.9028 AU |
| 3.0408 AU | |
| Eccentricity | 0.0454 |
| 5.30yr (1,937 days) | |
| 310.56° | |
| 0° 11m 9.24s / day | |
| Inclination | 13.017° |
| 277.58° | |
| 192.11° | |
| Physical characteristics | |
| Dimensions | 22±9 km(generic)[3] 28.007±0.132 km[4] 28.18 km(IRAS:3)[1] |
| 0.0737(IRAS:3)[1] 0.077±0.010[4] | |
| 11.4[1] | |
2613 Plzeň, provisional designation1979 QE, is anasteroid from the outer region of theasteroid belt, approximately 28 kilometers in diameter. It was discovered on 30 August 1979, by Czech astronomerLadislav Brožek at the South BohemianKleť Observatory in the Czech Republic.[5] It was later named for the Czech city ofPlzeň.[2]
Plzeň orbits the Sun in theouter main-belt at a distance of 2.9–3.2 AU once every 5 years and 4 months (1,937 days). Its orbit has aneccentricity of 0.05 and aninclination of 13° with respect to theecliptic.[1] It was first identified as1969 XA atCrimea-Nauchnij in 1969. However,Plzeň'sobservation arc begins with its discovery observation in 1979, as its first identification remained unused.[5]
According to three observations made by the Infrared Astronomical SatelliteIRAS and based on observations made by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission, the asteroid measures 28.0 and 28.2 kilometers in diameter and its surface has analbedo of 0.074 and 0.077,[1][4] which is a typical albedocarbonaceous asteroids. Based on itsabsolute magnitude of 11.4, its mean-diameter is between 13 and 32 kilometers, assuming analbedo in the range of 0.05 to 0.25, which covers both stony and carbonaceous types.[3]
As of 2016,Plzeň'sspectral type, surface composition,rotation period and shape remain unknown.[1][6]
Thisminor planet was named in honour of the Czech city ofPlzeň, birthplace of the discoverer.[2] The official naming citation was published on 28 January 1983 (M.P.C.7619).[7]
