197 Arete is an asteroid in the asteroid belt. It has a very bright surface, even so when compared to other rocky S-type asteroid.

It was discovered by J. Palisa on May 21, 1879, and named after Arete, the mother of Nausicaa in Homer's The Odyssey.[9] Every 18 years, this asteroid approaches within 0.04 AU of 4 Vesta. During these encounters, Vesta causes a gravitational perturbation of Arete, allowing the mass of Vesta to be directly determined.[10]

Photometric observations during 1984 showed a rotation period of 6.54 ± 0.02 hours and a brightness variation of 0.10 ± 0.01 in magnitude. The light curve shows "four well defined extrema with two asymmetric maxima".[11]

References

  1. ^ "Discovery Circumstances: Numbered Minor Planets". Archived from the original on 17 November 1999.
  2. ^ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
  3. ^ a b c d "JPL Small-Body Database Browser: 197 Arete" (2011-07-02 last obs). Archived from the original on 21 July 2011. Retrieved 18 August 2011.
  4. ^ "AstDys: 197 Arete". Retrieved 18 August 2011.
  5. ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
  6. ^ "Asteroid Lightcurve Data Base (LCDB) | PDS SBN Asteroid/Dust Subnode".
  7. ^ "Infrared Astronomical Satellite (IRAS)". Archived from the original on 24 February 2005. Retrieved 24 February 2005.
  8. ^ "Asteroid Lightcurve Data File, Updated March 1, 2001". Archived from the original on 20 July 2010.
  9. ^ Schmadel, Lutz D. (2003). Dictionary of minor planet names. Vol. 1 (5th ed.). Berlin Heidelberg New York: Springer-Verlag. pp. 32–33. ISBN 3-540-00238-3.
  10. ^ Hertz, Hans G. (19 April 1968). "Mass of Vesta". Science. 160 (3825): 299–300. Bibcode:1968Sci...160..299H. doi:10.1126/science.160.3825.299. PMID 17788233. S2CID 2555834.
  11. ^ di Martino, M.; Zappala, V.; de Campos, J. A.; Debehogne, H.; Lagerkvist, C.-I. (September 1988), "Rotational properties and lightcurves of the minor planets 94, 107, 197, 201, 360, 451, 511 and 702", Astronomy and Astrophysics Supplement Series, 67 (1): 95–101, Bibcode:1987A&AS...67...95D.


Allikas: http://en.wikipedia.org/wiki/197_Arete
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