197 Arete

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197 Arete
Discovery[1]
Discovered by Johann Palisa
Discovery date 1879-05-21
Designations
Pronunciation /əˈrt/ ə-REE-tee
Named after
Arete
1934 RE1 1950 DY
Minor planet category Asteroid belt
Orbital characteristics[2][3]
Epoch August 27, 2011
Aphelion 3.1790723 AU (Q)
Perihelion 2.3005757 AU (q)
2.7398240 AU (a)
Eccentricity 0.1603199
4.54 yr (1656.4656 d)
349.14185° (M)
Inclination 8.79334°
81.65294° (Ω)
246.54836° (ω)
Physical characteristics
Dimensions 29.2 km
6.54 h[4]
Albedo 0.442[5]
Spectral type
S[6]
9.18[2]

197 Arete is an asteroid in the asteroid belt. It has a very bright surface, unusually bright even for a 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.[7] 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.[8]

References[edit]

  1. ^ http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html
  2. ^ a b "JPL Small-Body Database Browser: 197 Arete". 2011-07-02 last obs. Archived from the original on 21 July 2011. Retrieved 2011-08-18. 
  3. ^ "AstDys: 197 Arete". Retrieved 2011-08-18. 
  4. ^ http://sbn.psi.edu/pds/resource/lc.html
  5. ^ http://dorothy.as.arizona.edu/DSN/IRAS/index_iras.html
  6. ^ http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT
  7. ^ Schmadel, Lutz D. (2003). Dictionary of minor planet names, Volume 1 (5th ed.). Berlin Heidelberg New York: Springer-Verlag. pp. 32–33. ISBN 3-540-00238-3. 
  8. ^ Hertz, Hans G. (April 19, 1968). "Mass of Vesta". Science 160 (3825): 299–300. Bibcode:1968Sci...160..299H. doi:10.1126/science.160.3825.299. PMID 17788233.