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191 Kolga

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Main-belt asteroid

191 Kolga
Discovery
Lightcurve-base 3D-model of 191 Kolga
Discovered by	C. H. F. Peters
Discovery date	30 September 1878
Designations
MPC designation	(191) Kolga
Pronunciation	/ˈkɒlɡə/
Named after	Kólga
Minor planet category	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)
Semi-major axis	2.8951 AU (433.10 Gm)
Eccentricity	0.091106
Orbital period (sidereal)	4.93yr (1799.2d)
Mean anomaly	326.28°
Mean motion	0° 12^m 0.288^s / day
Inclination	11.508°
Longitude of ascending node	159.31°
Argument of perihelion	227.00°
Earth MOID	1.64648 AU (246.310 Gm)
Jupiter MOID	2.29413 AU (343.197 Gm)
T_Jupiter	3.253
Physical characteristics
Dimensions	(134.3±12.8) × (78.2±1.7) km^[2]
Mean diameter	94.536±0.433 km^[1]
Mass	(7.24 ± 4.11/2.17)×10¹⁷ kg^[3]
Meandensity	1.637 ± 0.928/0.491 g/cm³^[3]
Synodic rotation period	17.625 hours^[4] 17.604 h (0.7335 d)^[1]
Geometric albedo	0.0408±0.003
Absolute magnitude (H)	9.07

191 Kolga is a large, darkmain-belt asteroid that was discovered by German-American astronomerC. H. F. Peters on September 30, 1878, inClinton, New York. It is named afterKólga, the daughter ofÆgir inNorse mythology.^[5]

In 2009,Photometric observations of this asteroid were made at the Palmer Divide Observatory inColorado Springs, Colorado. The resultinglight curve shows a synodicrotation period of 17.625 ± 0.004 hours with a brightness variation of 0.30 ± 0.03 inmagnitude. Previous independent studies produced inconsistent results that differ from this finding.^[4]

References

[edit]

^^a ^b ^cYeomans, Donald K.,"191 Kolga",JPL Small-Body Database Browser,NASA Jet Propulsion Laboratory, retrieved6 May 2016.
^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 fromthe original on 4 October 2018, retrieved3 October 2018
^^a ^bFienga, A.; Avdellidou, C.; Hanuš, J. (February 2020)."Asteroid masses obtained with INPOP planetary ephemerides"(PDF).Monthly Notices of the Royal Astronomical Society.492 (1).doi:10.1093/mnras/stz3407.
^^a ^bWarner, Brian D. (October 2009), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March-June",The Minor Planet Bulletin,36 (4):172–176,arXiv:1203.4336,Bibcode:2009MPBu...36..172W,doi:10.1016/j.pss.2012.03.009.
^Schmadel, Lutz D. (2012),Dictionary of Minor Planet Names(PDF) (6th ed.), Springer, p. 30,ISBN 978-3642297182.

External links

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Lightcurve plot of 191 Kolga, Palmer Divide Observatory,B. D. Warner (2009)
Asteroid Lightcurve Database (LCDB), query form (info Archived 21 July 2011 at theWayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
191 Kolga atAstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
191 Kolga at theJPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

Comets

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Authority control databases	JPL SBDB MPC

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