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56 Melete

From Wikipedia, the free encyclopedia
Large, dark, P-type main-belt asteroid

56 Melete
Three-dimensional model of 56 Melete created based on light curve on the top with an image of the asteroid on the bottom.
Discovery
Discovered byHermann Mayer Salomon Goldschmidt
Discovery date9 September 1857
Designations
(56) Melete
Pronunciation/ˈmɛlɪt/[1]
Named after
Melete
Main belt
AdjectivesMeletean/mɛlɪˈtən/
Orbital characteristics
Epoch 31 December 2006 (JD 2454100.5)
Aphelion480.683 Gm (3.213AU)
Perihelion295.717 Gm (1.977 AU)
388.200 Gm (2.595 AU)
Eccentricity0.238
1526.839 d (4.18a)
267.781°
Inclination8.072°
193.478°
103.648°
Physical characteristics
Dimensions113.2 km[2]
Mass(4.61 ± 0.00) × 1018 kg[3]
6.00 ± 1.31[3] g/cm3
18.1 hr[2]
0.065[2][4]
P[2]
8.31[2]

56 Melete is a large and darkmain-beltasteroid. It is a rather unusualP-type asteroid, probably composed oforganic-richsilicates,carbon andanhydrous silicates, with possible internalwaterice. The asteroid orbits theSun with a period of 4.18 years.

Melete was discovered byHermann Goldschmidt from his balcony inParis, on 9 September 1857. Its orbit was computed by E. Schubert, who named it afterMelete, theMuse ofmeditation inGreek mythology.[5] It was originally confused for41 Daphne before it was confirmed not to be by its second sighting on 27 August 1871.[6] In 1861, the brightness of 56 Melete was shown to vary by German astronomerFriedrich Tietjen.[7]

Melete has been studied byradar.[8]Photometric observations of this asteroid at the Palmer Divide Observatory inColorado Springs, Colorado in 2007 gave alight curve with a period of 18.151 ± 0.002 hours and a brightness variation of 0.15 ± 0.02 inmagnitude. This result is in agreement with a period of 18.1 hours independently reported in 1993 and 2007.[9]

To date, twostellaroccultations by Melete have been observed successfully (in 1997 and again in 2002).[citation needed]

References

[edit]
  1. ^Noah Webster (1884)A Practical Dictionary of the English Language
  2. ^abcde"JPL Small-Body Database Browser: 56 Melete" (2011-07-01 last obs).Jet Propulsion Laboratory. Retrieved26 January 2012.
  3. ^abCarry, 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. ^"Asteroid Data Sets". Archived fromthe original on 17 December 2009. Retrieved12 January 2007.
  5. ^Schmadel, Lutz D. (2003).Dictionary of Minor Planet Names. Springer Science & Business Media. p. 20.ISBN 978-3-540-00238-3.
  6. ^Appletons' annual cyclopaedia and register of important events of the year: 1862. New York:D. Appleton & Company. 1863. p. 173.
  7. ^Harwood, Margaret (December 1924), "Variations in the Light of Asteroids",Harvard College Observatory Circular, vol. 269, pp. 1–15,Bibcode:1924HarCi.269....1H.
  8. ^"Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved23 January 2012.
  9. ^Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March–May 2007",The Minor Planet Bulletin, vol. 34, no. 4, pp. 104–107,Bibcode:2007MPBu...34..104W.

External links

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