Astronomy:445 Edna
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Short description: Main-belt asteroid
| Discovery | |
|---|---|
| Discovered by | E. F. Coddington |
| Discovery date | 2 October 1899 |
| Designations | |
| (445) Edna | |
| Pronunciation | /ˈɛdnə/[1] |
| 1899 EX | |
| Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.53 yr (42563 d) |
| |{{{apsis}}}|helion}} | 3.82552 astronomical unit|AU (572.290 Gm) |
| |{{{apsis}}}|helion}} | 2.57569 AU (385.318 Gm) |
| 3.20060 AU (478.803 Gm) | |
| Eccentricity | 0.19525 |
| Orbital period | 5.73 yr (2091.4 d) |
| Mean anomaly | 190.102° |
| Mean motion | 0° 10m 19.668s / day |
| Inclination | 21.2944° |
| Longitude of ascending node | 292.111° |
| 81.2763° | |
| Physical characteristics | |
| Dimensions | 87.17±2.1 km[2] 88.60 ± 4.10 km[3] |
| Mass | (3.47 ± 0.78) × 1018 kg[3] |
| Mean density | 9.52 ± 2.50 g/cm3[3] |
| Rotation period | 19.97 h (0.832 d) |
| Geometric albedo | 0.0447±0.002 |
| Absolute magnitude (H) | 9.29 |
Edna (minor planet designation: 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
- ↑ 2.0 2.1 "445 Edna (1899 EX)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=445;cad=1.
- ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. 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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