249 Ilse

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249 Ilse
Discovery
Discovered byC. H. F. Peters
Discovery date16 August 1885
Designations
MPC designation(249) Ilse
1973 PB
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc130.59 yr (47699 d)
Aphelion2.89450 AU (433.011 Gm)
Perihelion1.85992 AU (278.240 Gm)
2.37721 AU (355.626 Gm)
Eccentricity0.21760
3.67 yr (1338.8 d)
19.31 km/s
223.964°
0° 16m 8.065s / day
Inclination9.61979°
334.727°
42.3241°
Physical characteristics
Dimensions34.83±1.1 km
84.94 h (3.539 d)
0.0428±0.003
Temperatureunknown
11.33

Ilse (minor planet designation: 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.[2]

References[edit]

  1. ^ "249 Ilse". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
  2. ^ Johnston, Robert. "Other Reports of Asteroid/TNO Companions (Updated 13 July 2013)". Retrieved 19 November 2013.

External links[edit]