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Puck (moon)

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Discovered byStephen P. Synnott / Voyager 2
Discovery timeDecember 30, 1985
Avgdistance from the center of its orbital path86,004.444 ± 0.064 km[1]
How egg-shaped its orbit is
0.00012 ± 0.000061[1]
How long it takes to complete an orbit0.76183287 ± 0.000000014 d[1]
Angle above the reference plane
0.31921 ± 0.021° (to Uranus' equator)[1]
What it orbitsUranus
Size and Other Qualities
Average distance from its center to its surface81 ± 2 km[2]
Area of its surface~82,400 km²[3]
Volume inside it~2,225,000 km³[3]
Mass~2.9×1018 kg[3]
Average density~1.3 g/cm³ (assumed)
Gravity at its surface0.028 m/s2[3]
Slowest speed able to escape into space
("escape velocity")
0.069 km/s [3]
How long it takes to turn around one timesynchronous[2]
Angle at which it turns
(in relation to its orbit)
How much light it reflects0.11 ± 0.1 (at 0.55 μm)[4]
Avg. surface temp.~64 K[3]
Seeming brightness
("apparent magnitude")
20.2 [5]






  1. 1.0 1.1 1.2 1.3 1.4 Jacobson, R.A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations". The Astronomical Journal 115: 1195-1199. doi:10.1086/300263 . http://adsabs.harvard.edu/abs/1998AJ....115.1195J.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites". Icarus 151: 69–77. doi:10.1006/icar.2001.6597 . http://adsabs.harvard.edu/abs/2001Icar..151...69K.
  4. 4.0 4.1 4.2 Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope". Icarus 151: 51–68. doi:10.1006/icar.2001.6596 . http://adsabs.harvard.edu/abs/2001Icar..151...51K.
  5. "Puck Statistics". http://www.solarviews.com/eng/puck.htm. Retrieved 2007-10-01.
  6. Smith, B.; Hansen, C. (January 16 1986). "IAU Circular No. 4159". http://cfa-www.harvard.edu/iauc/04100/04159.html#Item1. Retrieved 2006-08-06.
  7. "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21 2006. http://planetarynames.wr.usgs.gov/append7.html. Retrieved 2006-08-06.
  8. Thomas, P. (1987). "Voyager observations of 1985U1". Icarus 72: 79-83. doi:10.1016/0019-1035(87)90121-7 . http://adsabs.harvard.edu/abs/1987Icar...72...79T.
  9. Dumas, Christophe (2003). "Hubble Space Telescope NICMOS Multiband Photometry of Proteus and Puck". Astronomical Journal 126: 1080–1085. doi:10.1086/375909 . http://adsabs.harvard.edu/abs/2003AJ....126.1080D.

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