1373 Cincinnati
1373 Cincinnati, provisional designation 1935 QN, is an asteroid in a comet-like orbit from the Cybele region, located at the outermost rim of the asteroid belt, approximately 20 kilometers (12 miles) in diameter. It was the only asteroid discovery made by famous American astronomer Edwin Hubble, while observing distant galaxies at Mount Wilson Observatory in California on 30 August 1935. The rather spherical X-type asteroid has a rotation period of 5.3 hours. It was named for the Cincinnati Observatory.
| Discovery | |
|---|---|
| Discovered by | E. Hubble |
| Discovery site | Mount Wilson Obs. |
| Discovery date | 30 August 1935 |
| Designations | |
MPC designation | (1373) Cincinnati |
Named after | Cincinnati Observatory |
Alternative designations | 1935 QN |
Minor planet category | main-belt · (outer) Cybele · ACO |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.62 yr (30,176 d) |
| Aphelion | 4.4958 AU |
| Perihelion | 2.3457 AU |
Semi-major axis | 3.4208 AU |
| Eccentricity | 0.3143 |
Orbital period (sidereal) | 6.33 yr (2,311 d) |
Mean anomaly | 98.044° |
Mean motion | 0° 9m 20.88s / day |
| Inclination | 38.936° |
Longitude of ascending node | 297.47° |
| 99.148° | |
| TJupiter | 2.7190 |
| Physical characteristics | |
Mean diameter | 19.448±0.175 km 19.751±0.165 km 22.16±1.66 km |
Synodic rotation period | 5.2834±0.0002 h |
| 0.119 0.1518 0.155 | |
| SMASS = X k M | |
| 11.20 11.5 | |
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