9 Metis

Frae Wikipedia
Jump to navigation Jump to search
9 Metis 9 Metis symbol.svg
9Metis (Lightcurve Inversion).png
A three-dimensional model o 9 Metis based on its licht curve.
Discovery
Discovered biA. Graham
Discovery date25 April 1848
Designations
Pronunciation/ˈmts/ MEE-tiss
Named after
Mētis
1974 QU2
Main belt
AdjectivesMetidian /mɛˈtɪdiən/
Orbital chairactereestics[1]
Epoch 14 July 2004 (JD 2453200.5)
Aphelion400.548 Gm (2.678 AU)
Perihelion313.556 Gm (2.096 AU)
357.052 Gm (2.387 AU)
Eccentricity0.122
1346.815 d (3.69 a)
19.21 km/s
274.183°
Inclination5.576°
68.982°
5.489°
Proper orbital elements[2]
2.3864354 AU
0.1271833
4.6853629°
97.638314 deg / yr
3.68708 yr
(1346.705 d)
Precession o perihelion
38.754973 arcsec / yr
Precession of the ascending node
−41.998090 arcsec / yr
Pheesical chairacteristics
Dimensions222×182×130 km[3]
235×195×140 km[4][5][6]
190 km (Dunham)[1]
Mass(1.47±0.20)×1019 kg[3]
Mean density
4.12±1.33 g/cm³[3]
~0.070 m/s²
~0.11 km/s
0.2116 d (5.079 h)[1]
Albedo0.118 (geometric)[1]
Temperatur~173 K
max: 282 K (+9 °C)[7]
Spectral teep
S-type[8]
8.1[9] to 11.83
6.28[1]
0.23" to 0.071"

9 Metis is ane o the lairger main-belt asteroids.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 9 Metis" (last observation: 9 September 2008). Retrieved 10 November 2008. 
  2. "AstDyS-2 Metis Synthetic Proper Orbital Elements". Department of Mathematics, University of Pisa, Italy. Retrieved 1 October 2011. 
  3. 3.0 3.1 3.2 Jim Baer (2010). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 13 February 2011. 
  4. Baer, James; Steven R. Chesley (2007). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy. Springer Science+Business Media B.V. 2007. 100 (2008): 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8. Retrieved 10 November 2008. 
  5. J. Torppa et al., Shapes and rotational properties of thirty asteroids from photometric data, Icarus Vol. 164, p. 346 (2003).
  6. A. D. Storrs et al., A closer look at main-belt asteroids 1: WF/PC images, Icarus Vol. 173, p. 409 (2005).
  7. L. F. Lim et al., Thermal infrared (8–13 µm) spectra of 29 asteroids: the Cornell Mid-Infrared Asteroid Spectroscopy (MIDAS) Survey, Icarus Vol. 173, p. 385 (2005).
  8. asteroid lightcurve data file (March 2001)
  9. Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.