Satelit Neptunus

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Orbits of inner moons of Neptune including S 2004 N 1.jpg

Neptunus memiliki empat belas bulan yang diketahui, sejauh ini yang terbesar adalah Triton, ditemukan oleh William Lassell pada tanggal 10 Oktober 1846, hanya 17 hari setelah penemuan Neptunus sendiri. Lebih dari satu abad berlalu sebelum penemuan satelit alami kedua, yang disebut Nereid. Bulan Neptunus diberi nama untuk dewa air kecil dalam mitologi Yunani.

Satelit Neptunus[sunting | sunting sumber]

Bulan-bulan Neptunus di daftar ini, diurutkan berdasarkan periode orbit, dari yang terpendek hingga terpanjang. .

Bulan-bulan Neptunus
Nomor Label Nama Pengucapan

(key)

Gambar Diameter

(km)

Massa

(×1016 kg)

Sumbu semi-mayor

(km)[1]

Periode orbit

(h)[2]

Inklinasi(°)[2] Eksentrisitas

[1]

Tahun Penemuan[3] Penemu[3]
1 III Naiad /ˈnæd, ˈn-, -əd/[4]
A smeared white object elongated from the bottom-left to top-right can be seen in the center.
60.4
(96 × 60 × 52)
≈ 19 48.224 0.2944 4.691 0.0047 1989 Voyager Science Team
2 IV Thalassa /θəˈlæsə/ 81.4
(108 × 100 × 52)
≈ 35 50.074 0.3115 0.135 0.0018 1989 Voyager Science Team
3 V Despina /dsˈpnə/
A white oval shaped object somewhat elongated horizontally is seen in the center. There are a few small dark spots on its surface.
156
(180 × 148 × 128)
≈ 210 52.526 0.3346 0.068 0.0004 1989 Voyager Science Team
4 VI Galatea /ˌɡæləˈtə/
A small white object elongated from the bottom-left to top-right can be seen in the center.
174.8
(204 × 184 × 144)
≈ 375 61.953 0.4287 0.034 0.0001 1989 Voyager Science Team
5 VII Larissa /ləˈrɪsə/
An irregularly shaped grey object slightly elongated horizontally occupies almost the whole image. Its surface shows a number of dark and white spots.
194
(216 × 204 × 168)
≈ 495 73.548 0.5555 0.205 0.0012 1981 Reitsema et al.
6 XIV Hippocamp /ˈhɪpkæmp/
S-2004 N1 Hubble montage.jpg
34.8 ≈ 5 105.283 0.936 0.064 0.0005 2013 Showalter et al.[5]
7 VIII Proteus /ˈprtiəs/
A conically shaped object is seen almost fully illuminated from the left. The cone axis looks towards the observer. The outline of the object is a rectangle with rounded corners. The surface is rough with a few large depressions.
420
(436 × 416 × 402)
≈ 5035 117.646 1.122 0.075 0.0005 1989 Voyager Science Team
8 I Triton /ˈtrtən/
A large spherical object is half-illuminated from the bottom-left. The south pole faces to the light source. Around it in the bottom-left part of the body there is a large white area with a few dozens dark streaks elongated in the pole to equator direction. This polar cap has a slight red tinge. The equatorial region is darker with a tint of cyan. Its surface is rough with a number of craters and intersecting lineaments.
2.705,2±4,8
(2709 × 2706 × 2705)
2.140.800±5200 354.759 −5.877 156.865 0.0000 1846 Lassell
9 II Nereid /ˈnɪərɪd/
A small white smeared body is seen in center.
≈ 340 ± 50 ≈ 2700 5.513.818 360.13 7.090 0.7507 1949 Kuiper
10 IX Halimede /ˌhælˈmd/
Halimede.jpg
≈ 62 ≈ 16 16.611.000 −1.879,08 134.1 0.2646 2002 Holman et al.
11 XI Sao /ˈs/ ≈ 44 ≈ 6 22.228.000 2.912,72 49.907 0.1365 2002 Holman et al.
12 XII Laomedeia /ˌlmˈdə/ ≈ 42 ≈ 5 23.567.000 3.171,33 34.049 0.3969 2002 Holman et al.
13 X Psamathe /ˈsæməθ/
Psamathe arrow.png
≈ 40 ≈ 4 48.096.000 −9.074,30 137.679 0.3809 2003 Sheppard et al.
14 XIII Neso /ˈns/ ≈ 60 ≈ 15 49.285.000 −9.740,73 131.265 0.5714 2002 Holman et al.


Referensi[sunting | sunting sumber]

  1. ^ a b Showalter, M. R.; de Pater, I.; Lissauer, J. J.; French, R. S. (2019). "The seventh inner moon of Neptune" (PDF). Nature. 566 (7744): 350–353. doi:10.1038/s41586-019-0909-9. 
  2. ^ a b Jacobson, R.A. (2008). "NEP078 – JPL satellite ephemeris". Diakses tanggal 2010-10-18. 
  3. ^ a b "Planetary Names: Planet and Satellite Names and Discoverers". planetarynames.wr.usgs.gov. Diakses tanggal 2019-07-28. 
  4. ^ Jones, Daniel (2003) [1917], Peter Roach; James Hartmann; Jane Setter, ed., English Pronouncing Dictionary, Cambridge: Cambridge University Press, ISBN 3-12-539683-2 
  5. ^ "Hubble Finds New Neptune Moon". Space Telescope Science Institute. 2013-07-15. Diakses tanggal 2013-07-15. 

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