249 Ilse

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249 Ilse
Discovery
Discovered by C. H. F. Peters
Discovery date August 16, 1885
Designations
1973 PB
Minor planet category Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 432.742 Gm (2.893 AU)
Perihelion 279.103 Gm (1.866 AU)
355.922 Gm (2.379 AU)
Eccentricity 0.216
1340.402 d (3.67 a)
19.31 km/s
175.357°
Inclination 9.629°
334.851°
41.91°
Physical characteristics
Dimensions 35.0 km
Mass unknown
Mean density
unknown
unknown
unknown
85.24 h
Albedo 0.043
Temperature unknown
Spectral type
unknown
11.33

249 Ilse is a Main belt asteroid. It has an unusually slow rotation period, about 3.5 days.

It was discovered by C. H. F. Peters on August 16, 1885 in Clinton, New York and was named after Ilse, a legendary German princess.

Due to the long rotation period, a possible asteroidal satellite of Ilse was proposed by R. P. Binzel in 1987 however no evidence of this has been found.[1]

References[edit]

  1. ^ Johnston, Robert. "Other Reports of Asteroid/TNO Companions (Updated 13 July 2013)". Retrieved 19 November 2013.