Iapetus (muin)

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Iapetus
Iapetus
Photomosaic of Cassini images taken on 31 December 2004. It shows the dark Cassini Regio and its border with the bright Roncevaux Terra, several large craters (Falsaron above center, Turgis, the largest, at right), and the equatorial ridge (the Toledo and Tortelosa Montes).
Discovery
Discovered bi G. D. Cassini
Discovery date October 25, 1671
Designations
Saturn VIII
Adjectives Iapetian, Japetian
Orbital chairactereestics
3560820 km
Eccentricity 0.0286125[1]
79.3215 d
3.26 km/s
Inclination
  • 17.28° (to the ecliptic)
  • 15.47° (to Saturn's equator)
  • 8.13° (to Laplace plane)[2]
Satellite o Saturn
Pheesical chairacteristics
Dimensions 1,492.0 × 1,492.0 × 1,424 km [3]
Mean radius
734.5±2.8 km[3]
6700000 km2
Mass (1.805635±0.000375)×1021 kg[4]
Mean density
1.088±0.013 g/cm³[3]
0.224 m/s2
0.573 km/s
79.3215 d
(synchronous)
zero
Albedo 0.05–0.5[5]
Temperatur 90–130 K
10.2–11.9[6]

Iapetus (Greek: Ιαπετός), or occasionally Japetus,[7] is the third-lairgest naitural satellite o Saturn, eleivent-lairgest in the Solar Seestem,[8]

References[eedit | eedit soorce]

  1. Pseudo-MPEC for Saturn VIII Archived Februar 22, 2012 at the Wayback Machine
  2. Jacobson, R.A. (2009) SAT317 (2009-12-17). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2011-01-15. 
  3. 3.0 3.1 3.2 Roatsch, T.; Jaumann, R.; Stephan, K.; Thomas, P. C. (2009). "Cartographic Mapping of the Icy Satellites Using ISS and VIMS Data". Saturn from Cassini-Huygens. pp. 763–781. ISBN 978-1-4020-9216-9. doi:10.1007/978-1-4020-9217-6_24. 
  4. Jacobson, R. A.; Antreasian, P. G.; Bordi, J. J.; Criddle, K. E.; Ionasescu, R.; Jones, J. B.; Mackenzie, R. A.; Meek, M. C.; Parcher, D.; Pelletier, F. J.; Owen, Jr., W. M.; Roth, D. C.; Roundhill, I. M.; Stauch, J. R. (December 2006). "The Gravity Field of the Saturnian System from Satellite Observations and Spacecraft Tracking Data". The Astronomical Journal. 132 (6): 2520–2526. Bibcode:2006AJ....132.2520J. doi:10.1086/508812. 
  5. Williams, David R. "Saturnian Satellite Fact Sheet". NASA. Retrieved 2007-11-04. 
  6. Observatorio ARVAL (Aprile 15, 2007). "Classic Satellites of the Solar System". Observatorio ARVAL. Retrieved 2011-12-17. 
  7. Lassell, William (Januar 14, 1848). "Satellites of Saturn". Monthly Notices of the Royal Astronomical Society. 8 (3): 42–43. Bibcode:1848MNRAS...8...42L. doi:10.1093/mnras/8.3.42. 
  8. The muins mair massive than Iapetus are: the Muin, the 4 Galilean muins (Ganymede, Callisto, Io, an Europa), Titan, Rhea, Titania, Oberon, an Triton. See JPLSSD.