(3103) Eger

Orbit:

Apollo
q = 0.91 AU, a = 1.41 AU, i = 21 deg (MPC 32296)

Abs. magnitude:

H = 15.74 +/- 0.10 (G = 0.42 +/- 0.08) (Pravec et al. 1998)

Taxonomic class, diameter and albedo:

E, 1.5 km, 0.53 (Veeder et al. 1989)
albedo probably lower (0.41-0.49) according to Pravec et al. (1998)

Rotation period, amplitude:

P = 5.706 hr, ampl. 0.77 - 0.90 (Pravec et al. 1998)

Details on photometric observations from Ondrejov:

We have observed this asteroid in support of radar observations at Goldstone. Lightcurves in R band were obtained on 5 nights between 1996 July 15.0 and 27.0. The synodic rotation period of (5.7059 +/- 0.0002) hr was derived from the data. The composite lightcurve constructed from our observations is shown here.

The observations indicates a global asymmetry of Eger's figure: The lightcurve extrema occured at phases of 0.00 (M1), 0.21 (m1), 0.44 (M2) and 0.80 (m2), significantly deviating from a 0.25-interval expected for a symmetric figure, and there are rapid variations of the shapes of the lightcurve minima. Detailed results of an analysis of the observations have been published in Pravec et al. (1998).

(3103) Eger lightcurve

References:

Pravec, P., M. Wolf, and L. Sarounova 1998. Lightcurves of 26 near-Earth asteroids. Icarus, 136, 124-153.
Veeder, G. J., M. S. Hanner, D. L. Matson, and E. F. Tedesco 1989. Astron. J. 97, 1211-1219.
Wisniewski, W. Z. 1987. Icarus 70, 566-572.
Wisniewski, W. Z. 1991. Icarus 90, 117.

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