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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 has an albedo of 0.64,[1] making it a highly reflective asteroid.

3103 Eger
3103Eger (Lightcurve Inversion).png
Lightcurve-based 3D-model of Eger
Discovered byM. Lovas
Discovery sitePiszkesteto
Discovery date20 January 1982
MPC designation(3103) Eger
Named after
1982 BB
Apollo, Mars crosser
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc12495 days (34.21 yr)
Aphelion1.9021 AU (284.55 Gm)
Perihelion0.90673 AU (135.645 Gm)
1.4044 AU (210.10 Gm)
1.66 yr (607.90 d)
0° 35m 31.92s / day
Earth MOID0.0778981 AU (11.65339 Gm)
Proper orbital elements[1][2]
99.460 deg / yr
3.61955 yr
(1322.039 d)
Physical characteristics
Dimensions1.5 km[1]
Mean radius
0.75 km
5.710156±0.000007 h[3]

It has made and will continue to make many close approaches to Earth. Its closest so far occurred in August 6, 1996, when the asteroid passed 0.11509 AU (17.217 Gm) from Earth.[1] The observed YORP value is (1.4±0.6)×10−8 rad d−2.[3]

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 alsoEdit


  1. ^ a b c d e f g "3103 Eger". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3103. Retrieved 14 April 2016.
  2. ^ "(162058) 1997AE12". NEODyS. University of Pisa. Retrieved 25 November 2015.
  3. ^ a b Durech, J.; Vokrouhlický, D.; Baransky, A. R.; Breiter, S.; Burkhonov, O. A.; Cooney, W.; et al. (November 2012). "Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect". Astronomy and Astrophysics. 547: 9. arXiv:1210.2219. Bibcode:2012A&A...547A..10D. doi:10.1051/0004-6361/201219396.

External linksEdit