| Discovery[1] | |
|---|---|
| Discovered by | M. B. Protić |
| Discovery site | Belgrade Obs. |
| Discovery date | 20 March 1938 |
| Designations | |
| (1675) Simonida | |
Named after | Simonida(Queen)[2] |
| 1938 FB · 1931 AZ 1936 SG · 1941 BD 1943 VJ · 1951 CL1 1953 VD · 1958 FE 1958 GX | |
| main-belt · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.04 yr (31,427 days) |
| Aphelion | 2.5114AU |
| Perihelion | 1.9550 AU |
| 2.2332 AU | |
| Eccentricity | 0.1246 |
| 3.34yr (1,219 days) | |
| 18.859° | |
| 0° 17m 43.08s / day | |
| Inclination | 6.7964° |
| 30.145° | |
| 50.114° | |
| Physical characteristics | |
| Dimensions | 11.08±0.5 km(IRAS:8)[3][4] 12.16±0.52 km[5] |
| 5.16±0.04h[6] 5.2885±0.0005 h[7] 5.3±0.2 h[8] | |
| 0.211±0.019[5] 0.2480±0.025(IRAS:8)[3][4] 0.2501(SIMPS)[3] | |
| S[3] | |
| 11.8[1] · 11.9[3][5] · 11.9±0.06[8][9] · 11.91[4] | |
1675 Simonida, provisional designation1938 FB, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 11 kilometers in diameter. Discovered byMilorad Protić in 1938, it was later named after the medieval Byzantine princessSimonida.[2]
Simonida was discovered on 20 March 1938, by Serbian astronomerMilorad Protić atBelgrade Astronomical Observatory.[10] On the same night, it was independently discovered by Belgian astronomerFernand Rigaux atUccle Observatory in Belgium.[2]
TheS-type asteroid is a member of theFlora family, a large population of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,219 days). Its orbit has aneccentricity of 0.12 and aninclination of 7° with respect to theecliptic.[1]Simonida's first observation was aprecovery taken atLowell Observatory in 1931, extending the body'sobservation arc by 7 years prior to its official discovery observation.[10]
In March 1988, Polish astronomerWiesław Z. Wiśniewski obtained alightcurve ofSimonida that gave arotation period of 5.3 hours with a brightness variation of 0.26magnitude (U=2).[8] In January 2004, astronomer A. Kryszczynska atPoznań Observatory measured a period of 5.2885 hours with an amplitude of 0.50 magnitude (U=2+).[7] In January 2008, photometric observations by astronomers Martine Castets, Bernard Trégon, Arnaud Leroy andRaoul Behrend gave a rotation period of 5.16 hours with a brightness variation of 0.21 (U=3-).[6]
According to the space-based JapaneseAkari satellite,Simonida measures 12.16 kilometers in diameter, and its surface has analbedo of 0.211.[5] TheCollaborative Asteroid Lightcurve Link, however, agrees with the results obtained by 8 observations of the Infrared Astronomical SatelliteIRAS, that gave a diameter of 11.08 kilometers and an albedo of 0.25 with an absolute magnitude of 11.9.[3][4]
Thisminor planet was named for Byzantine princess and queen consortSimonida, the wife of medieval Serbian kingStefan Milutin and symbol of beauty in former Yugoslavia.[2] The officialnaming citation was published by theMinor Planet Center on 1 January 1973 (M.P.C. 3359).[11]
