Global Information1520 Imatra information
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 22 October 1938 |
| Designations | |
MPC designation | (1520) Imatra |
Named after | Imatra (Finnish town)[2] |
Alternative designations | 1938 UY · 1938 YH |
Minor planet category | main-belt · (outer)[3] Ursula[4] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.53 yr (28,682 days) |
| Aphelion | 3.4132 AU |
| Perihelion | 2.8113 AU |
Semi-major axis | 3.1123 AU |
| Eccentricity | 0.0967 |
Orbital period (sidereal) | 5.49 yr (2,005 days) |
Mean anomaly | 179.71° |
Mean motion | 0° 10m 46.2s / day |
| Inclination | 15.241° |
Longitude of ascending node | 253.40° |
Argument of perihelion | 116.83° |
| Physical characteristics | |
| Dimensions | 53.41 km (derived)[3] 53.42±19.70 km[5] 53.435±0.370 km[6] 53.61±1.4 km[7] 53.79±14.73 km[8] 55.55±0.60 km[9] 56.094±1.824 km[10] 58.63±0.70 km[11] |
Synodic rotation period | 5.23 h (dated)[12] 18.609±0.004 h[13] 18.635±0.004 h[14] |
Geometric albedo | 0.039±0.009[11] 0.04±0.03[8] 0.0428 (derived)[3] 0.05±0.06[5] 0.0561±0.0109[10] 0.058±0.002[9] 0.0615±0.003[7] 0.062±0.006[6] |
Spectral type | SMASS = C[1] · C[3] |
Absolute magnitude (H) | 10.0[7][9][10] · 10.30[8][11] · 10.40±0.35[15] · 10.4[1][3] · 10.43[5] |
1520 Imatra, provisional designation 1938 UY, is a carbonaceous Ursula asteroid from the outer region of the asteroid belt, approximately 54 kilometers in diameter. It was discovered on 22 October 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named after the Finnish town of Imatra.[2][16]
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