191 Kolga

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191 Kolga
Discovery
Discovered by C. H. F. Peters
Discovery date 30 September 1878
Designations
MPC designation (191) Kolga
Pronunciation /ˈkɔːlɡə/
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 131.26 yr (47942 d)
Aphelion 3.1588 AU (472.55 Gm)
Perihelion 2.6313 AU (393.64 Gm)
2.8951 AU (433.10 Gm)
Eccentricity 0.091106
4.93 yr (1799.2 d)
326.28°
0° 12m 0.288s / day
Inclination 11.508°
159.31°
227.00°
Earth MOID 1.64648 AU (246.310 Gm)
Jupiter MOID 2.29413 AU (343.197 Gm)
TJupiter 3.253
Physical characteristics
Mean radius
50.515±1.75 km
17.625 hours[2]
17.604 h (0.7335 d)[1]
0.0408±0.003
9.07

191 Kolga is a large, dark main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on September 30, 1878, in Clinton, New York. It is named after Kolga, the daughter of Ægir in Norse mythology.[3]

In 2009, Photometric observations of this asteroid were made at the Palmer Divide Observatory in Colorado Springs, Colorado. The resulting light curve shows a synodic rotation period of 17.625 ± 0.004 hours with a brightness variation of 0.30 ± 0.03 in magnitude. Previous independent studies produced inconsistent results that differ from this finding.[2]

References[edit]

  1. ^ a b Yeomans, Donald K., "191 Kolga", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016. 
  2. ^ a b Warner, Brian D. (October 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March-June", The Minor Planet Bulletin, 36 (4), pp. 172–176, arXiv:1203.4336Freely accessible, Bibcode:2009MPBu...36..172W, doi:10.1016/j.pss.2012.03.009. 
  3. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 30, ISBN 3642297188. 

External links[edit]