Global Information1023 Thomana information
 Shape model of Thomana from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 25 June 1924 |
| Designations | |
MPC designation | (1023) Thomana |
Named after | St. Thomas Choir of Leipzig (German boys' choir)[2] |
Alternative designations | 1924 RU · 1936 RG |
Minor planet category | main-belt · (outer)[3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 92.86 yr (33,916 days) |
| Aphelion | 3.4893 AU |
| Perihelion | 2.8442 AU |
Semi-major axis | 3.1667 AU |
| Eccentricity | 0.1019 |
Orbital period (sidereal) | 5.64 yr (2,058 days) |
Mean anomaly | 107.00° |
Mean motion | 0° 10m 29.64s / day |
| Inclination | 10.078° |
Longitude of ascending node | 194.32° |
Argument of perihelion | 194.19° |
| Physical characteristics | |
| Dimensions | 53.28±20.25 km[4] 58.27±1.6 km (IRAS:11)[5] 61.02±1.00 km[6] 61.34±4.17 km[7] |
Synodic rotation period | 17.56±0.05 h[8] 17.56±0.01 h[9] 17.561±0.007 h[8] 17.5611±0.0005 h[10] |
Geometric albedo | 0.05±0.05[4] 0.059±0.012[7] 0.060±0.002[6] 0.0649±0.004 (IRAS:11)[5] |
Spectral type | Tholen = G[1] · G[3] B–V = 0.764[1] U–B = 0.493[1] |
Absolute magnitude (H) | 9.76[1][3][5][6][7] · 9.99[4] · 10.26±0.57[11] |
1023 Thomana, provisional designation 1924 RU, is a rare-type carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 58 kilometers in diameter. It was discovered on 25 June 1924, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after the St. Thomas Choir of Leipzig.[12]
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