191 Kolga

191 Kolga (minor planet designation: 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.[4]

191 Kolga
Discovery
Discovered byC. H. F. Peters
Discovery date30 September 1878
Designations
(191) Kolga
Pronunciation/ˈkɒlɡə/
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc131.26 yr (47942 d)
Aphelion3.1588 AU (472.55 Gm)
Perihelion2.6313 AU (393.64 Gm)
2.8951 AU (433.10 Gm)
Eccentricity0.091106
4.93 yr (1799.2 d)
326.28°
0° 12m 0.288s / day
Inclination11.508°
159.31°
227.00°
Earth MOID1.64648 AU (246.310 Gm)
Jupiter MOID2.29413 AU (343.197 Gm)
TJupiter3.253
Physical characteristics
Dimensions(134.3±12.8)×(78.2±1.7) km[2]
Mean radius
50.515±1.75 km
17.625 hours[3]
17.604 h (0.7335 d)[1]
0.0408±0.003
9.07

    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.[3]

    References

    1. Yeomans, Donald K., "191 Kolga", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
    2. P. Maley; T. George; J. Bardecker; T. Blank; D. Dunham; D. Kenyon; J. Gout; M. Collins; B. Gimple; W. Thomas; J. Bean; R. Sumner; M. Collins (9 February 2018), Stellar occultation from 191 Kolga (preliminary analysis), archived from the original on 4 October 2018, retrieved 3 October 2018
    3. 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:1203.4336, Bibcode:2009MPBu...36..172W, doi:10.1016/j.pss.2012.03.009.
    4. Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 30, ISBN 3642297188.


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