23_Thalia

23 Thalia

23 Thalia

Main-belt asteroid

Thalia (/θəˈlaɪ.ə/;[lower-alpha 1] minor planet designation: 23 Thalia) is a large main-belt asteroid. It was discovered by J. R. Hind on December 15, 1852, at the private observatory of W. Bishop, located in Hyde Park, London, England.[5] Bishop named it after Thalia, the Muse of comedy and pastoral poetry in Greek mythology.[6]

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It is categorized as an S-type asteroid consisting of mainly of iron- and magnesium-silicates. This the second most common type of asteroid in the main belt. Based on analysis of the light curve, the object has a sidereal rotation period of 0.513202 ± 0.000002 days. An ellipsoidal model of the light curve gives an a/b ratio of 1.28 ± 0.05.[7]

With a semimajor axis of 2.628, the asteroid is orbiting between the 3:1 and 5:2 Kirkwood gaps in the main belt.[8] Its orbital eccentricity is larger than the median value of 0.07 for the main belt, and the inclination is larger than the median of below 4°. But most of the main-belt asteroids have an eccentricity of no more than 0.4 and an inclination of up to 30°, so the orbit of 23 Thalia is not unusual for a main-belt asteroid.[9]

Thalia has been studied by radar.[10]

Notes

  1. Stressed on the second syllable.

References

  1. [1]
    Noah Webster (1884) A Practical Dictionary of the English Language
  2. [2]
    "JPL Small-Body Database Browser: 23 Thalia". Jet Propulsion Laboratory. 30 April 2011. Retrieved 28 January 2012.
  3. [3]
    Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  4. [4]
    "Albedos Data Table". Planetary Science Institute. Archived from the original on 22 July 2012. Retrieved 3 November 2008.
  5. [5]
    Lardner, Dionysius (1858). Hand-books of natural philosophy and astronomy. Vol. 3. Philadelphia: Blanchard and Lea. p. 315. Retrieved 10 November 2009.
  6. [6]
    Schmadel, Lutz D. (2003). Dictionary of minor planet names (5th ed.). Springer. p. 17. ISBN 3-540-00238-3.
  7. [7]
    Lagerkvist, C.-I.; et al. (October 1995). "Physical studies of asteroids. XXIX. Photometry and analysis of 27 asteroids". Astronomy and Astrophysics Supplement. 113: 115–122. Bibcode:1995A&AS..113..115L.
  8. [8]
    Yeomans, Donald K. "Asteroid Main-Belt Distribution". NASA/Jet Propulsion Laboratoty. Retrieved 10 November 2009.
  9. [9]
    Williams, Gareth (3 April 2007). "Distribution of the Minor Planets". Minor Planets Center. Archived from the original on 21 March 2007. Retrieved 15 April 2007.
  10. [10]
    "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 30 October 2011.
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