445 Edna

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/
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° 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 ; 88.60 ± 4.10 km
Mass	(3.47 ± 0.78) × 1018 kg
Mean density	9.52 ± 2.50 g/cm3
Synodic rotation period	19.97 h (0.832 d)
Geometric albedo	0.0447±0.002
Absolute magnitude (H)	9.29

Last updated December 02, 2025

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
1 2 "445 Edna (1899 EX)". JPL Small-Body Database . NASA/Jet Propulsion Laboratory . Retrieved 10 May 2016.
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.

External links

445 Edna at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
445 Edna at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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[1] Noah Webster (1884) A Practical Dictionary of the English Language

[jpldata-2] 1 2 "445 Edna (1899 EX)". JPL Small-Body Database . NASA/Jet Propulsion Laboratory . Retrieved 10 May 2016.

[Carry2012-3] 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.

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