604 Tekmessa
Tekmessa (minor planet designation: 604 Tekmessa) is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on February 16, 1906. The name may have been inspired by the asteroid's provisional designation 1906 TK.
| Discovery | |
|---|---|
| Discovered by | Joel Hastings Metcalf |
| Discovery site | Taunton, Massachusetts |
| Discovery date | 16 February 1906 |
| Designations | |
MPC designation | (604) Tekmessa |
| Pronunciation | /tɛkˈmɛsə/ |
Alternative designations | 1906 TK |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 104.87 yr (38303 d) |
| Aphelion | 3.7742 AU (564.61 Gm) |
| Perihelion | 2.5217 AU (377.24 Gm) |
Semi-major axis | 3.1480 AU (470.93 Gm) |
| Eccentricity | 0.19894 |
Orbital period (sidereal) | 5.59 yr (2040.1 d) |
Mean anomaly | 351.53° |
Mean motion | 0° 10m 35.256s / day |
| Inclination | 4.4213° |
Longitude of ascending node | 12.171° |
| 28.815° | |
| Physical characteristics | |
Mean radius | 32.58±2.05 km 32.21 ± 1.505 km |
| Mass | (1.45 ± 0.28) × 1018 kg |
Mean density | 10.35 ± 2.4 g/cm3 |
Synodic rotation period | 5.5596 h (0.23165 d) |
| 0.0870±0.012 | |
| 9.29, 9.5 | |
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