Iapetus (buwan)

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Iapetus 706 1419 1.jpg
Photomosaic of Cassini images taken Dec. 31, 2004, showing 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)
Natuklasan niG. D. Cassini
Natuklasan noongOctober 25, 1671
Ibang designasyonSaturn VIII
Pang-uriIapetian, Japetian
Orbital characteristics
Semi-major axis3560820 km
Orbital period79.3215 d
Average orbital speed3.26 km/s
  • 17.28° (to the ecliptic)
  • 15.47° (to Saturn's equator)
  • 8.13° (to Laplace plane)[2]
Satellite ofSaturn
Pisikal na katangian
Dimensiyon1,492.0 × 1,492.0 × 1,424 km [3]
Mean radius734.5±2.8 km[3]
Pang-ibabaw na sukat6700000 km2
Mass(1.805635±0.000375)×1021 kg[4]
Mean density1.088±0.013 g/cm³[3]
Surface gravity0.224 m/s2
Escape velocity0.573 km/s
Rotation period79.3215 d
Axial tiltzero
Temperature90–130 K
Apparent magnitude10.2–11.9[6]

Ang Iapetus ay isang buwan sa Saturn.

pinagmulan[baguhin | baguhin ang batayan]

  1. Pseudo-MPEC for Saturn VIII[patay na link]
  2. Jacobson, R.A. (2009) SAT317 (2009-12-17). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Nakuha noong 2011-01-15.
  3. 3.0 3.1 3.2 Roatsch, Th.; Jaumann, R.; Stephan, K.; Thomas, P. C. (2009). "Cartographic Mapping of the Icy Satellites Using ISS and VIMS Data": 763–781. doi:10.1007/978-1-4020-9217-6_24. Cite journal requires |journal= (tulong)
  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. (2006). "The Gravity Field of the Saturnian System from Satellite Observations and Spacecraft Tracking Data". The Astronomical Journal. 132 (6): 2520–2526. doi:10.1086/508812. ISSN 0004-6256.
  5. Williams, David R. "Saturnian Satellite Fact Sheet". NASA. Nakuha noong 2007-11-04.
  6. Observatorio ARVAL (2007-04-15). "Classic Satellites of the Solar System". Observatorio ARVAL. Nakuha noong 2011-12-17.

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