| Discovery[1] | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 22 July 1935 |
| Designations | |
| (1359) Prieska | |
Named after | Prieska(South African town)[2] |
| 1935 OC · A903 UE A917 HA | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.69 yr (41,524 days) |
| Aphelion | 3.3306AU |
| Perihelion | 2.9053 AU |
| 3.1179 AU | |
| Eccentricity | 0.0682 |
| 5.51yr (2,011 days) | |
| 232.56° | |
| 0° 10m 44.4s / day | |
| Inclination | 11.105° |
| 64.033° | |
| 343.11° | |
| Physical characteristics | |
| Dimensions | 36.45±9.67 km[4] 46.096±0.136 km[5] 48.491±0.439 km[6] 52.07 km(derived)[3] 52.64±1.07 km[7] 65.86±16.91 km[8] |
| 0.03±0.01[8] 0.042±0.002[7] 0.0494(derived)[3] 0.0570±0.0085[6] 0.059±0.007[5] 0.07±0.03[4] | |
| Tholen = CX:[1] · CX:[3] B–V = 0.710[1] U–B = 0.355[1] | |
| 10.3[1][3][6][8] · 10.36[4] · 10.47±0.24[9] · 10.50[7] | |
1359 Prieska, provisional designation1935 OC, is a rare-type carbonaceousasteroid from the outer region of theasteroid belt, approximately 50 kilometers in diameter. It was discovered on 22 July 1935, by English-born South-African astronomerCyril Jackson atJohannesburg Observatory inSouth Africa.[10] The asteroid was named after the South African town ofPrieska.
Prieska orbits the Sun in theouter main-belt at a distance of 2.9–3.3 AU once every 5 years and 6 months (2,011 days). Its orbit has aneccentricity of 0.07 and aninclination of 11° with respect to theecliptic.[1] In 1903,Prieska was first identified asA903 UE atHeidelberg Observatory, extending the body'sobservation arc by 32 years prior to its official discovery observation at Johannesburg.[10]
According to the surveys carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission and the JapaneseAkari satellite,Prieska measures between 36.45 and 65.86 kilometers in diameter, and its surface has analbedo between 0.03 and 0.07.[4][5][6][7][8] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0494 and a diameter of 52.07 kilometers with anabsolute magnitude of 10.3.[3]
In theTholen taxonomy,Prieska is a rare CX:-subtype, that transitions from the darkC to theX-type asteroids. Only a few asteroids have been assigned thisspectral type by Tholen(also seelist of CX-type asteroids).
Photometriclightcurve observations ofPrieska at the AustralianOakley Southern Sky Observatory (E09) in May 2011 and October 2013, respectively, were inconclusive due to insufficient data.[11][12] As of 2017, the asteroid'srotation period still remains unknown.[1][3]
Thisminor planet was named for the South African town ofPrieska, located on the south bank of the Orange River, in the province of theNorthern Cape.[2] The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 123).[2]
