Moons of Neptune - Table

Table

Key
‡
Prograde irregular moons		 ♠
Retrograde irregular moons

The Neptunian moons are listed here by orbital period, from shortest to longest. Irregular (captured) moons are marked by color.

Neptunian moons
Order
 Label
 Name Pronunciation
 Image Diameter
(km)		 Mass
(×1016 kg)		 Semi-major axis
(km)		 Orbital period
(d)		 Inclination
(°)		 Eccentricity
 Discovery
year		 Discoverer
1 03 !Neptune III Naiad ˈneɪ.əd 0066 !66
(96 × 60 × 52)		 0000019 !19 48,227 0.294 4.691 0.0003 1989 Voyager Science Team
2 04 !Neptune IV Thalassa θəˈlæsə 0082 !82
(108 × 100 × 52)		 0000035 !35 50,074 0.311 0.135 0.0002 1989 Voyager Science Team
3 05 !Neptune V Despina dɨsˈpiːnə 0150 !150
(180 × 148 × 128)		 0000210 !210 52,526 0.335 0.068 0.0002 1989 Voyager Science Team
4 06 !Neptune VI Galatea ˌɡæləˈtiːə 0176 !176
(204 × 184 × 144)		 0000375 !375 61,953 0.429 0.034 0.0001 1989 Voyager Science Team
5 07 !Neptune VII Larissa ləˈrɪsə 0194 !194
(216 × 204 × 168)		 0000495 !495 73,548 0.555 0.205 0.0014 1981 H. Reitsema, W. Hubbard, L. Lebofsky, and D. J. Tholen
6 08 !Neptune VIII Proteus ˈproʊtiəs 0420 !420
(436 × 416 × 402)		 0005035 !5,035 117,646 1.122 0.075 0.0005 1989 Voyager Science Team
7 01 !Neptune I Triton♠ ˈtraɪtən 2705 !2,705.2 ± 4.8
(2,709 × 2,706 × 2,705)		 2,140,000 !2,140,800
± 5200		 354,759 5.877 156.865 0.0000 1846 W. Lassell
8 02 !Neptune II Nereid‡ ˈnɪəriː.ɪd 0340 !340 ± 50 0002700 !2,700 5,513,818 360.13 7.090 0.7507 1949 G.P. Kuiper
9 09 !Neptune IX Halimede♠ ˌhælɨˈmiːdiː 0062 !~62 0000016 !16 16,611,000 1,879.08 112.712 0.2646 2002 M. Holman, J. Kavelaars, T. Grav, W. Fraser, and D. Milisavljevic
10 11 !Neptune XI Sao‡ ˈseɪ.oʊ 0044 !~44 0000006 !6 22,228,000 2,912.72 53.483 0.1365 2002 M. Holman, J. Kavelaars, T. Grav, W. Fraser, and D. Milisavljevic
11 12 !Neptune XII Laomedeia‡ ˌleɪ.ɵmɨˈdiːə 0042 !~42 0000005 !5 23,567,000 3,171.33 37.874 0.3969 2002 M. Holman, J. Kavelaars, T. Grav, W. Fraser, and D. Milisavljevic
12 10 !Neptune X Psamathe♠ ˈsæməθiː 0040 !~40 0000004 !4 48,096,000 9,074.30 126.312 0.3809 2003 S.S. Sheppard, D.C. Jewitt, and J. Kleyna
13 13 !Neptune XIII Neso♠ ˈniːsoʊ 0060 !~60 0000015 !15 49,285,000 9,740.73 136.439 0.5714 2002 M. Holman, J. Kavelaars, T. Grav, W. Fraser, and D. Milisavljevic

Read more about this topic:  Moons Of Neptune

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