Global Information1192 Prisma information
 Modelled shape of Prisma from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | A. Schwassmann |
| Discovery site | Bergedorf Obs. |
| Discovery date | 17 March 1931 |
| Designations | |
MPC designation | (1192) Prisma |
Named after | Bergedorf Spectral Catalogue (astronomical catalog)[2] |
Alternative designations | 1931 FE |
Minor planet category | main-belt · (inner) Phocaea[3][4] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.77 yr (31,328 days) |
| Aphelion | 2.9762 AU |
| Perihelion | 1.7561 AU |
Semi-major axis | 2.3661 AU |
| Eccentricity | 0.2578 |
Orbital period (sidereal) | 3.64 yr (1,329 days) |
Mean anomaly | 297.62° |
Mean motion | 0° 16m 14.88s / day |
| Inclination | 23.902° |
Longitude of ascending node | 1.3517° |
Argument of perihelion | 131.44° |
| Physical characteristics | |
| Dimensions | 7.22 km (calculated)[3] 7.377±0.193 km[5] 9.27±0.25 km[6] |
Synodic rotation period | 6.546±0.0170 h[7] 6.558 h[8] 6.55836±0.00005 h[9][10] |
Geometric albedo | 0.144±0.009[6] 0.220±0.022[5] 0.23 (assumed)[3] |
Spectral type | S[3] |
Absolute magnitude (H) | 12.497±0.008 (R)[7] · 12.87±0.47[11] · 12.92[1][3][5][6] |
1192 Prisma, provisional designation 1931 FE, is an elongated Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Friedrich Schwassmann at the Bergedorf Observatory in Hamburg on 17 March 1931.[12] The asteroid was named after the Bergedorf Spectral Catalogue, an astronomical catalog.[2]
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