445 Edna

Discovery

Discovery date2 October 1899

Designations

MPC designation(445) Edna

Pronunciation/ˈɛdnə/

Alternative designations1899 EX

Minor planet categoryMain belt

Orbital characteristics

Epoch 31 July 2016 (JD 2457600.5)

Observation arc116.53 yr (42563 d)

Aphelion3.82552 AU (572.290 Gm)

Perihelion2.57569 AU (385.318 Gm)

Semi-major axis3.20060 AU (478.803 Gm)

Eccentricity0.19525

Orbital period (sidereal)5.73 yr (2091.4 d)

Mean anomaly190.102°

Mean motion0° 10m 19.668s / day

Inclination21.2944°

Longitude of ascending node292.111°

Argument of perihelion81.2763°

Physical characteristics

Dimensions87.17±2.1 km 88.60 ± 4.10 km

Mass(3.47 ± 0.78) × 1018 kg

Mean density9.52 ± 2.50 g/cm3

Synodic rotation period19.97 h (0.832 d)

Geometric albedo0.0447±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.

External links