| Discovery | |
|---|---|
| Discovered by | E. F. Coddington |
| Discovery date | 2 October 1899 |
| Designations | |
| MPC designation | (445) Edna |
| Pronunciation | /ˈɛdnə/ |
| Alternative designations | 1899 EX |
| Minor planet category | Main belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.53 yr (42563 d) |
| Aphelion | 3.82552 AU (572.290 Gm) |
| Perihelion | 2.57569 AU (385.318 Gm) |
| Semi-major axis | 3.20060 AU (478.803 Gm) |
| Eccentricity | 0.19525 |
| Orbital period (sidereal) | 5.73 yr (2091.4 d) |
| Mean anomaly | 190.102° |
| Mean motion | 0° 10 19.668 / day |
| Inclination | 21.2944° |
| Longitude of ascending node | 292.111° |
| Argument of perihelion | 81.2763° |
| Physical characteristics | |
| Dimensions | 87.17±2.1 km 88.60 ± 4.10 km |
| Mass | (3.47 ± 0.78) × 10 kg |
| Mean density | 9.52 ± 2.50 g/cm |
| Synodic rotation period | 19.97 h (0.832 d) |
| Geometric albedo | 0.0447±0.002 |
| Absolute magnitude (H) | 9.29 |
445 Edna is a large Main belt asteroid.
It was discovered by E. F. Coddington on October 2, 1899, at Mount Hamilton, California. It was the astronomer's third and final asteroid discovery.
References
- Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "445 Edna (1899 EX)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 10 May 2016.
- ^ Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
External links
- 445 Edna at AstDyS-2, Asteroids—Dynamic Site
- 445 Edna at the JPL Small-Body Database
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