Astronomy:56 Melete
.png) Three-dimensional model of 56 Melete created based on light-curve | |
| Discovery | |
|---|---|
| Discovered by | Hermann Mayer Salomon Goldschmidt |
| Discovery date | September 9, 1857 |
| Designations | |
| (56) Melete | |
| Pronunciation | /ˈmɛlɪtiː/[1] |
| Named after | Melete |
| Minor planet category | Main belt |
| Adjectives | Meletean /mɛlɪˈtiːən/ |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| |{{{apsis}}}|helion}} | 480.683 Gm (3.213 AU) |
| |{{{apsis}}}|helion}} | 295.717 Gm (1.977 AU) |
| 388.200 Gm (2.595 AU) | |
| Eccentricity | 0.238 |
| Orbital period | 1526.839 d (4.18 a) |
| Mean anomaly | 267.781° |
| Inclination | 8.072° |
| Longitude of ascending node | 193.478° |
| 103.648° | |
| Physical characteristics | |
| Dimensions | 113.2 km[2] |
| Mass | (4.61 ± 0.00) × 1018 kg[3] |
| Mean density | 6.00 ± 1.31[3] g/cm3 |
| Rotation period | 18.1 hr[2] |
| Geometric albedo | 0.065[2][4] |
| P[2] | |
| Absolute magnitude (H) | 8.31[2] |
Melete (minor planet designation: 56 Melete) is a large and dark main belt asteroid. It is a rather unusual P-type asteroid, probably composed of organic rich silicates, carbon and anhydrous silicates, with possible internal water ice. The asteroid orbits the Sun with a period of 4.18 years.
Melete was discovered by Hermann Goldschmidt from his balcony in Paris, on September 9, 1857. Its orbit was computed by E. Schubert, who named it after Melete, the Muse of meditation in Greek mythology.[5] It was originally confused for 41 Daphne before it was confirmed not to be by its second sighting on August 27, 1871.[6] In 1861, the brightness of 56 Melete was shown to vary by German astronomer Friedrich Tietjen.[7]
Melete has been studied by radar.[8] Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado in 2007 gave a light curve with a period of 18.151 ± 0.002 hours and a brightness variation of 0.15 ± 0.02 in magnitude. This result is in agreement with a period of 18.1 hours independently reported in 1993 and 2007.[9]
To date, two stellar occultations by Melete have been observed successfully (in 1997 and again in 2002).[citation needed]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 2.2 2.3 2.4 "JPL Small-Body Database Browser: 56 Melete". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=56.
- ↑ 3.0 3.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ "Asteroid Data Sets". http://www.psi.edu/pds/resource/albedo.html.
- ↑ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 20. ISBN 978-3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA20.
- ↑ Appletons' annual cyclopaedia and register of important events of the year: 1862. New York: D. Appleton & Company. 1863. p. 173. https://archive.org/stream/1862appletonsan02newyuoft#page/n180/mode/1up.
- ↑ Harwood, Margaret (December 1924), "Variations in the Light of Asteroids", Harvard College Observatory Circular 269: pp. 1–15, Bibcode: 1924HarCi.269....1H.
- ↑ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/asteroids/.
- ↑ Warner, Brian D. (December 2007), "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - March–May 2007", The Minor Planet Bulletin 34 (4): pp. 104–107, Bibcode: 2007MPBu...34..104W.
External links
- Lightcurve plot of 56 Melete, Palmer Divide Observatory, B. D. Warner (2007)
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 56 Melete at AstDyS-2, Asteroids—Dynamic Site
- 56 Melete at the JPL Small-Body Database
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