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The Jacana Astronomy Site |
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Planets - Neptune's Satellite Data |
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Print this page: File > Print > OK PLANETS - NEPTUNE'S SATELLITE DATA This table updated on 01/11/03. The satellites are listed in order of increasing distance from Neptune. Data adopted from NASA Space Science Data Centre/Goddard Spaceflight Centre tables and other sources. To save you counting, there are now 13 moons.
ORBITAL PARAMETERS
Orbital Rotation
NAME No. Semimajor Neptunian Period Period Inc.
axis (km) Radii (d) (d) (°) Ecc.
Naiad III 48 227 1.948 0.294396 - 4.74 0.0003
Thalassa IV 50 075 2.022 0.311485 - 0.21 0.0002
Despina V 52 526 2.121 0.334655 - 0.07 0.0001
Galatea VI 61 953 2.502 0.428745 - 0.05 0.0001
Larissa VII 73 548 2.970 0.554654 - 0.20 0.0014
Proteus VIII 117 647 4.751 1.122315 - 0.04 0.0004
Triton I 354 760 14.328 5.876854(R) S 157.345 0.000016
Nereid II 5 513 400 222.67 360.13619 - 7.23 0.7512
S/2002 N1 15 686 000 633.4 1 874.8 - 134.1 0.572
S/2002 N2 22 452 000 906.6 2 918.9 - 48.4 0.297
S/2002 N3 22 580 000 911.8 2 982.3 - 34.6 0.479
S/2002 N4 46 570 000 1 880.5 8 863.1(R) - 132.5 0.527
S/2003 N1 46 738 000 1 887.3 9 136.1(R) - 137.3 0.450
Notes: Inc. = Inclination. Ecc. = Eccentricity. R = Retrograde orbit. S = Synchronous rotation - rotation period same as orbital period. BULK PARAMETERS
NAME No. Mass Radius Mean density Visual geometric Visual
# (km) (kg/m³) albedo Magnitude
Naiad III 0.002 33 - 0.07 24.6
Thalassa IV 0.004 41 - 0.09 23.9
Despina V 0.02 75 - 0.09 22.5
Galatea VI 0.04 88 - 0.08 22.4
Larissa VII 0.05 104 x 89 - 0.09 22.0
Proteus VIII 0.5 218 x 208 x 201 - 0.10 20.3
Triton I 214 1 353.4 2 050 0.76 13.5
Nereid II 0.3 170 1 000? 0.16 19.7
S/2002 N1 0.001 24 - 0.16 25.1
S/2002 N2 0.001 24 - 0.16 24.2
S/2002 N3 0.001 24 - 0.16 25.5
S/2002 N4 - 30 - - -
S/2003 N1 0.0002 14 - 0.16 25.0
Note: (# - Mass, 1020 kg.)
Source: Derek Haselden's Astronomical Charts & Tables JACANA ASTRONOMY SITE | SOLAR SYSTEM | STARS | GALAXIES | NEBULAE SUPERNOVAE | CLUSTERS | DOUBLE STARS | COMETS | ASTEROIDS | DUST CLOUDS ASTRONOMY LINKS | WHAT'S UP THIS MONTH | INTERESTING ARTICLES | ASTRO QUOTATIONS HUBBLE | SPITZER | CHANDRA | MOON PHASES | ASTRONOMICAL GLOSSARY | MESSIER LIST MOON RISE/SET/% TABLE | SKYMAPS.COM SKY CHART FOR THIS MONTH
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