3103 Eger

3103 Eger
Lightcurve-based 3D-model of Eger
Discovery
Discovered by M. Lovas
Discovery site Piszkesteto
Discovery date 20 January 1982
Designations
MPC designation (3103) Eger
Named after
 Eger
1982 BB
Apollo, Mars crosser
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 12495 days (34.21 yr)
Aphelion 1.9021 AU (284.55 Gm)
Perihelion 0.90673 AU (135.645 Gm)
1.4044 AU (210.10 Gm)
Eccentricity 0.35437
1.66 yr (607.90 d)
208.62°
0° 35m 31.92s / day
Inclination 20.931°
129.792°
254.007°
Earth MOID 0.0778981 AU (11.65339 Gm)
Proper orbital elements
0.325
22.364°
99.460 deg / yr
3.61955 yr
(1322.039 d)
Physical characteristics
Dimensions 1.5 km[1]
Mean radius
 0.75 km
5.710156±0.000007 h[2]
0.64[1]
E
15.38[1]

    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.

    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.[2]

    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

    References

    1. 1 2 3 4 5 6 "3103 Eger". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3103. Retrieved 14 April 2016.
    2. 1 2 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.


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