_Siberia.png) Shape model ofSiberia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 12 February 1926 |
| Designations | |
| (1094) Siberia | |
| Pronunciation | /saɪˈbɪəriə/[2] |
Named after | Siberia[3] (Region inNorth Asia) |
| 1926 CB · A918 EJ | |
| main-belt · (middle) Eunomia[4][5] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.07 yr (29,977 days) |
| Aphelion | 2.8844AU |
| Perihelion | 2.2048 AU |
| 2.5446 AU | |
| Eccentricity | 0.1335 |
| 4.06yr (1,483 days) | |
| 221.13° | |
| 0° 14m 34.08s / day | |
| Inclination | 14.028° |
| 149.14° | |
| 310.29° | |
| Physical characteristics | |
| Dimensions | 17.08±6.34 km[6] 17.869±0.180 km[7] 17.87±0.18 km[7] 18.05±1.0 km[8] 18.16 km(derived)[4] 18.36±4.08 km[9] 18.79±0.24 km[10] |
| 21.15±0.01 h[11] | |
| 0.089±0.003[10] 0.0943±0.011[8] 0.10±0.05[9] 0.11±0.05[6] 0.1227(derived)[4] 0.127±0.012[7] | |
| SMASS =Xk[1] | |
| 11.60[4][7][9] · 11.7[1] · 11.81[6] · 11.90[8][10] | |
1094 Siberia (prov. designation:1926 CB) is anEunomian asteroid from the central regions of theasteroid belt. It was discovered on 12 February 1926, by Soviet astronomerSergey Belyavsky at theSimeiz Observatory on the Crimean peninsula.[12] TheX-type asteroid (Xk) has arotation period of 21.2 hours and measures approximately 18 kilometers (11 miles) in diameter. It was named after the vast region ofSiberia in North Asia.[3]
Siberia is a member of theEunomia family (502),[5] a prominentfamily of stony asteroids and the largest one in the intermediate main belt with more than 5,000 members.[13]: 23 It orbits the Sun in thecentral main-belt at a distance of 2.2–2.9 AU once every 4 years and 1 month (1,483 days). Its orbit has aneccentricity of 0.13 and aninclination of 14° with respect to theecliptic.[1]
The asteroid was first identified asA918 EJ atHeidelberg or Simeiz in March 1918. The body'sobservation arc begins at Heidelberg in June 1935, more than 9 years after its official discovery observation at Simeiz.[12]
Thisminor planet was named after the vast geographic region ofSiberia inNorth Asia, approximately 13.1 million square kilometres (5,100,000 sq mi) in area. The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 103).[3]
In theSMASS classification,Siberia is a Xk-subtype, that transitions from theX-type to theK-type asteroids,[1] while the overallspectral type of the Eunomia family is that of a stonyS-type asteroid.[13]: 23 It is also an assumed X-type.[4]
In December 2006, a first rotationallightcurve ofSiberia was obtained fromphotometric observations by astronomers from New Zealand and Australia. Lightcurve analysis gave arotation period of 21.15 hours with a brightness amplitude of 0.45magnitude, indicating a non-spherical shape (U=2).[11] While not being aslow rotator,Siberia has a longer than average rotation period, especially for its size.[11]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Siberia measures between 17.08 and 18.79 kilometers in diameter and its surface has analbedo between 0.089 and 0.127.[6][7][8][9][10]
TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.1227 and a diameter of 18.16 kilometers based on anabsolute magnitude of 11.6.[4]
1094 Siberia is mentioned briefly inJohn Varley's science fiction novelRolling Thunder, where it is described as "an escape-proof prison" of the Republic of Mars.[citation needed]
