445 Edna

445 Edna is a large Main belt asteroid.

DiscoveredbyE. F. Coddington

Discoverydate2 October 1899

MPCdesignation

(445) Edna

Pronunciation/ˈɛdnə/^[1]

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445 Edna

Lightcurve-base 3D-model of 445 Edna.
Discovery
Discovered by	E. F. Coddington
Discovery date	2 October 1899
Designations
MPC designation	(445) Edna
Pronunciation	/ˈɛdnə/[1]
Alternative designations	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)
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° 10m 19.668s / day
Inclination	21.2944°
Longitude of ascending node	292.111°
Argument of perihelion	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]
Synodic rotation period	19.97 h (0.832 d)
Geometric albedo	0.0447±0.002
Absolute magnitude (H)	9.29

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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.