Ganymede (muin)

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True-color image taken by the Galileo orbiter
Image o Ganymede's anti-Jovian hemisphere taken bi the Galileo orbiter (contrast is enhanced). Lichter surfaces, such as in recent impacts, grooved terrain an the whitish north polar cap at upper richt, are enriched in watter ice.
Discovered biGalileo Galilei
Discovery dateJanuar 7, 1610[1][2][3]
Jupiter III
AdjectivesGanymedian, Ganymedean
Orbital chairactereestics
Periapsis1069200 km[lower-alpha 1]
Apoapsis1071600 km[lower-alpha 2]
1070400 km[4]
7.15455296 d[4]
10.880 km/s
Inclination2.214° (tae the ecliptic)
0.20° (tae Jupiter's equator)[4]
Satellite oJupiter
Pheesical chairacteristics
Mean radius
2634.1±0.3 km (0.413 Earths)[5]
8.72×107 km2 (0.171 Earths)[lower-alpha 3]
Vollum7.6×1010 km3 (0.0704 Earths)[lower-alpha 4]
Mass1.4819×1023 kg (0.025 Earths)[5]
Mean density
1.936 g/cm3[5]
1.428 m/s2 (0.146 g)[lower-alpha 5]
2.741 km/s[lower-alpha 6]
Surface temp. min mean max
K 70[9] 110[9] 152[10]
4.61 (opposeetion)[7]
4.38 (in 1951)[8]
Surface pressur
Composeetion bi vollumOxygen[11]

Ganymede (Jupiter III) is the lairgest muin o Jupiter an in the Solar Seestem, an the anly muin kent tae hae a magnetic field.

Notes[eedit | eedit soorce]

  1. Periapsis is derived frae the semimajor axis (a) an eccentricity (e): .
  2. Apoapsis is derived frae the semimajor axis (a) an eccentricity (e): .
  3. Surface aurie derived frae the radius (r): .
  4. Volume derived frae the radius (r): .
  5. Surface gravity derived frae the mass (m), the gravitational constant (G) an the radius (r): .
  6. Escape velocity derived frae the mass (m), the gravitational constant (G) an the radius (r): .

References[eedit | eedit soorce]

  1. Galilei, Galileo; translated by Edward Carlos (March 1610). Barker, Peter, ed. "Sidereus Nuncius" (PDF). University of Oklahoma History of Science. Retrieved 2010-01-13. 
  2. Wright, Ernie. "Galileo's First Observations of Jupiter" (PDF). University of Oklahoma History of Science. Retrieved 2010-01-13. 
  3. "NASA: Ganymede". 2009-09-29. Retrieved 2010-03-08. 
  4. 4.0 4.1 4.2 4.3 "Planetary Satellite Mean Orbital Parameters". Jet Propulsion Laboratory, California Institute of Technology. 
  5. 5.0 5.1 5.2 Showman, Adam P.; Malhotra, Renu (1999). "The Galilean Satellites" (PDF). Science. 286 (5437): 77–84. doi:10.1126/science.286.5437.77. PMID 10506564. 
  6. Bills, Bruce G. (2005). "Free and forced obliquities of the Galilean satellites of Jupiter". Icarus. 175 (1): 233–247. Bibcode:2005Icar..175..233B. doi:10.1016/j.icarus.2004.10.028. 
  7. 7.0 7.1 Yeomans, Donald K. (2006-07-13). "Planetary Satellite Physical Parameters". JPL Solar System Dynamics. Retrieved 2007-11-05. 
  8. Yeomans; Chamberlin. "Horizon Online Ephemeris System for Ganymede (Major Body 503)". California Institute of Technology, Jet Propulsion Laboratory. Retrieved 2010-04-14.  (4.38 on 1951-Oct-03)
  9. 9.0 9.1 Delitsky, Mona L.; Lane, Arthur L. (1998). "Ice chemistry of Galilean satellites" (PDF). J.of Geophys. Res. 103 (E13): 31,391–31,403. Bibcode:1998JGR...10331391D. doi:10.1029/1998JE900020. 
  10. Orton, G.S.; Spencer, G.R.; et al. (1996). "Galileo Photopolarimeter-radiometer observations of Jupiter and the Galilean Satellites". Science. 274 (5286): 389–391. Bibcode:1996Sci...274..389O. doi:10.1126/science.274.5286.389. 
  11. Hall, D.T.; Feldman, P.D.; et al. (1998). "The Far-Ultraviolet Oxygen Airglow of Europa and Ganymede". The Astrophysical Journal. 499 (1): 475–481. Bibcode:1998ApJ...499..475H. doi:10.1086/305604.