This is the Web Edition of "A Trip Into Space", a Coimbra-based electronic book on space science. Both the texts and the photos are by courtesy of National Aeronautics and Space Administration.
| This is the Web Edition of "A Trip Into Space", a Coimbra-based electronic book on space science. Both the texts and the photos are by courtesy of National Aeronautics and Space Administration.
|
A Trip Into Space  Fact Sheets Neptunian Satellite Fact Sheet |
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| See also: Notes On The Fact Sheets |   |
Mass Radius Mean density Visual geometric albedo
(1020 kg) (km) (kg/m3)
Naiad (NIII) 29 0.06
Thalassa (NIV) 40 0.06
Despina (NV) 74 0.06
Galatea (NVI) 79 0.06
Larissa (NVII) 104 x 89 0.06
Proteus (NVIII) 218 x 208 x 201 0.06
Triton (NI) 214.7 1,352.6 2,050 0.77
Nereid (NII) 0.2 170 0.4
Semimajor axis Period* Inclination Eccentricity
(103 km) (Neptunian Radii) (days) (degrees)
Naiad (NIII) 48.227 1.948 0.294396 4.74 0.000
Thalassa (NIV) 50.075 2.022 0.311485 0.21 0.000
Despina (NV) 52.526 2.121 0.334655 0.07 0.000
Galatea (NVI) 61.953 2.502 0.428745 0.05 0.000
Larissa (NVII) 73.548 2.970 0.554654 0.20 0.00139
Proteus (NVIII) 117.647 4.751 1.122315 0.55 0.0004
Triton (NI) 354.76 14.328 5.876854R 157.345 0.000016
Nereid (NII) 5,513.4 222.67 360.13619 7.23 0.7512
*R indicates retrograde motion
Last Update: 2004-Nov-27