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13 Egeria

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13 Egeria
Discovery
Discovered byAnnibale de Gasparis
Discovery dateNovember 2, 1850
Designations
none
Main belt
Orbital characteristics
Epoch July 14, 2004 (JD 2453200.5)
Aphelion417.953 Gm (2.794 AU)
Perihelion352.719 Gm (2.358 AU)
385.336 Gm (2.576 AU)
Eccentricity0.085
1509.977 d (4.13 a)
18.56 km/s
339.787°
Inclination16.540°
43.305°
81.401°
Physical characteristics
Dimensions207.6 km (217×196 km)
Mass~9.4×1018 kg
Mean density
2 ? g/cm³
~0.0580 m/s²
~0.1098 km/s
0.2935 d[1]
Albedo0.083[2]
Temperature~174 K
Spectral type
G-type asteroid
6.74

13 Egeria (Template:PronEng, Latin: Æge?ria) is a large Main belt asteroid.

It was discovered by A. de Gasparis on November 2, 1850, and was named by Urbain J. J. Le Verrier, whose computations led to the discovery of Neptune. Egeria was a goddess (other sources say a nymph) of Aricia, in Italy, and the wife of Numa Pompilius, second king of Rome.

Egeria occulted a star on January 8, 1992. The former's disc was determined to be quite circular (217×196 km).


  1. ^ http://www.astrosurf.com/aude-old/map_files/AstVarMAP01-2003.htm
  2. ^ http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab
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