| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 20 September 1930 |
| Designations | |
| (1190) Pelagia | |
Named after | Pelageya Shajn (Soviet–Russian astronomer)[2] |
| 1930 SL · 1928 DP 1938 YA · 1953 VB 1953 XP · A909 BC | |
| main-belt · (inner) Nysa[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 108.44 yr (39,609 days) |
| Aphelion | 2.7530AU |
| Perihelion | 2.1096 AU |
| 2.4313 AU | |
| Eccentricity | 0.1323 |
| 3.79yr (1,385 days) | |
| 284.95° | |
| 0° 15m 36s / day | |
| Inclination | 3.1697° |
| 26.477° | |
| 41.199° | |
| Physical characteristics | |
| Dimensions | 15.05±3.86 km[4] 17.30±0.27 km[5] 17.39 km(derived)[3] 17.923±0.185 km[6] |
| 2.3661±0.0003h[7] | |
| 0.031±0.042[6] 0.0486(derived)[3] 0.054±0.018[4] 0.067±0.002[5] | |
| X[8] · C[3] | |
| 12.40[5] · 12.60[4] · 12.7[1][3] · 12.78±0.23[8] · 13.13[6] | |
1190 Pelagia, provisional designation1930 SL, is a dark Nysianasteroid from the inner regions of theasteroid belt, approximately 17 kilometers in diameter. It was discovered on 20 September 1930, by Soviet–Georgian astronomerGrigory Neujmin at theSimeiz Observatory on the Crimean peninsula.[9] The asteroid was named after astronomerPelageya Shajn.[2]
Pelagia is a member of theNysa family (405),[3] a prominent family of theinner main-belt, named after44 Nysa.
It orbits the Sun at a distance of 2.1–2.8 AU once every 3 years and 9 months (1,385 days). Its orbit has aneccentricity of 0.13 and aninclination of 3° with respect to theecliptic.[1] The asteroid'sobservation arc begins atHeidelberg Observatory in January 1909, when it was identified asA909 BC, more than 21 years prior to its official discovery observation at Simeiz.[9]
The asteroid has been characterized as anX-type asteroid byPan-STARRS photometric survey.[8]
In December 2010, a rotationallightcurve ofPelagia was obtained from photometric observations by Japanese astronomer couple Hiromi and Hiroko Hamanowa. Lightcurve analysis gave a well-definedrotation period of 2.3661 hours with a brightness amplitude of 0.08magnitude (U=3).[7]
While not being afast rotator, the body has a notably short period for an asteroid of its size. Based on the lightcurve's low amplitude, it appears to have a ratherspheroidal shape.
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Pelagia measures between 15.05 and 17.923 kilometers in diameter and its surface has analbedo between 0.031 and 0.067.[4][5][6] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0486 and a diameter of 17.39 kilometers based on anabsolute magnitude of 12.7.[3]
Thisminor planet was named in honor of Soviet–Russian astronomerPelageya Shajn (1894–1956). In 1928, she discovered the asteroid1112 Polonia and became the first femalediscoverer of minor planets (RI 895).[2] A second asteroid,1648 Shajna, was also named in her and her husbands memory (Grigory Shajn).[10]
