3103 Eger

Minor Planet
name = 3103 Eger
discoverer = Miklós Lovas
discovery_date = January 20, 1982
designations = 1982 BB
category = Apollo, Mars crosser
epoch = January 1, 2007 (JD 2454101.5 )
semimajor = 210.158 Gm (1.405 AU)
perihelion = 135.672 Gm (0.907 AU)
aphelion = 284.640 Gm (1.904 AU)
eccentricity = .354
period = 608.208 d 1.665 a
inclination = 20.931°
asc_node = 129.834°
arg_peri = 253.967°
mean_anomaly = 55.517°
speed = 40.496 km/s
dimensions = km
mass =
density =
gravity =
escape_velocity =
rotation = h
spectral_class = E
abs_mag =15.0
albedo = .53
temperature =

3103 Eger is an Apollo and Mars-crosser asteroid that was discovered in 1982, by Miklós Lovas. It was named after the city of Eger, Hungary.

It makes eight approaches to Earth less than 30 Gm (.2 AU) in the 20th and 21st centuries. The last close approach was in August 2006 at 19.2 Gm. The next is in August 2011 at 22.9 Gm.

Interestingly, 3103 Eger is the only asteroid besides 4 Vesta identified as the parent body for specific meteorites. 4 Vesta is the parent body for Howardite, Eucrite, and Diogenite meteorites, while 3103 Eger is the parent body for Aubrite meteorites. In this characteristic 3103 Eger is related spectroscopically to the 434 Hungaria type asteroids, which are a Hirayama-family of orbital types, and E-type asteroids which form a spectroscopical type.

See also

* Aubrite
* E-type asteroid
* Hungaria family
* (144898) 2004 VD17
* 44 Nysa
* 2867 Šteins

References

* [http://newton.dm.unipi.it/cgi-bin/neodys/neoibo?objects:Eger;main NeoDys]
*
* [http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3024.pdf Mineralogy of Asteroids]
* [http://adsabs.harvard.edu/abs/1992Icar..100...95G Relation between E-asteroids, 3103 Eger and 434 Hungaria]
* [http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/full/2007/41/aa8411-07/aa8411-07.right.html Relations between E-type asteroids 2867 Steins, a target of the Rosetta mission, and 3103 Eger]
* [http://www.asu.cas.cz/~ppravec/eger.htm 3103 Eger in the Ondrejov NEO program]