180_Garumna

180 Garumna

180 Garumna

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This article is about the asteroid. For the insect: Garumna and the Latin name of the river in France, see Garonne.

Garumna (minor planet designation: 180 Garumna) is a main belt asteroid that was discovered by the French astronomer Henri Joseph Perrotin on January 29, 1878.[4] Its name comes from the ancient Latin name for the Garonne River in France. In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it with the Sr sub-type.[3]

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The rotation period of this asteroid is very nearly equal to that of the rotation of the Earth. This means that only a small portion of the light curve can be observed from any one location, requiring measurements from multiple sites in order to build a complete curve. In 2012, this mission was accomplished, giving a period of 23.866 ± 0.001 hours with a brightness variation of 0.42 ± 0.02 in magnitude. Allowing for a margin of error and changes in phase angle, this finding agrees with previous measurements made in 2008 and 2011.[5]

References

  1. [1]
    Noah Webster (1884) A Practical Dictionary of the English Language
  2. [2]
    Yeomans, Donald K., "180 Garumna", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
  3. [3]
    DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
  4. [4]
    "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
  5. [5]
    Pilcher, Frederick; et al. (April 2012), "Rotation Period Determination for 180 Garumna: A Triumph of Global Collaboration", The Minor Planet Bulletin, 39 (2): 46, Bibcode:2012MPBu...39...46P, ISSN 1052-8091.


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