445 Edna

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445 Edna
Discovery
Discovered by E. F. Coddington
Discovery date2 October 1899
Designations
(445) Edna
Pronunciation /ˈɛdnə/ [1]
1899 EX
Main belt
Orbital characteristics [2]
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)
3.20060 AU (478.803 Gm)
Eccentricity 0.19525
5.73 yr (2091.4 d)
190.102°
0° 10m 19.668s / day
Inclination 21.2944°
292.111°
81.2763°
Physical characteristics
Dimensions87.17±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]
19.97  h (0.832  d)
0.0447±0.002
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.

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    References

    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. 1 2 "445 Edna (1899 EX)". JPL Small-Body Database . NASA/Jet Propulsion Laboratory . Retrieved 10 May 2016.
    3. 1 2 3 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.