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9 Metis

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9 Metis
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

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  1. a b c d e "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. a b c Jim Baer (2010). "Recent Asteroid Mass Determinations". Personal Website. Archived frae the original on 21 October 2013. Retrieved 13 Februar 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. Archived frae the original (PDF) on 24 Februar 2011. Retrieved 10 November 2008. Archived 2011-02-24 at the Wayback Machine
  5. J. Torppa et al., Shapes and rotational properties of thirty asteroids from photometric data Archived 2015-11-06 at the Wayback Machine, 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)". Archived frae the original on 17 Januar 2010. Retrieved 7 November 2014.
  9. Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. pp. 391. ISBN 0-395-34835-8.