Misplaced Pages

249 Ilse

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Main-belt asteroid

249 Ilse
3D model based on lightcurve data
Discovery
Discovered byC. H. F. Peters
Discovery date16 August 1885
Designations
MPC designation(249) Ilse
PronunciationGerman: [ˈɪlzə]
Named afterIlse
Alternative designationsA885 QA, 1973 PB
Minor planet categoryMain belt
Orbital characteristics
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)
Semi-major axis2.37721 AU (355.626 Gm)
Eccentricity0.21760
Orbital period (sidereal)3.67 yr (1338.8 d)
Average orbital speed19.31 km/s
Mean anomaly223.964°
Mean motion0° 16 8.065 / day
Inclination9.61979°
Longitude of ascending node334.727°
Argument of perihelion42.3241°
Physical characteristics
Dimensions34.83±1.1 km
Synodic rotation period84.94 h (3.539 d)
Geometric albedo0.0428±0.003
Temperatureunknown
Absolute magnitude (H)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.

References

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

External links

Minor planets navigator
Small Solar System bodies
Minor planets
Asteroid
Distant minor planet
Comets
Other


Stub icon

This article about an asteroid native to the asteroid belt is a stub. You can help Misplaced Pages by expanding it.

Categories: