Despina (moon)

Despina
Despina as seen by Voyager 2 (smeared horizontally)
Discovery[1]
Discovered byStephen P. Synnott and Voyager Imaging Team
Discovery dateJuly 1989
Designations
Designation
Neptune V
Pronunciation/dəˈspaɪnə, dəˈspiːnə, dɛ-/
Named after
Δέσποινα Despœna
AdjectivesDespinian
Orbital characteristics[2][3]
Epoch 18 August 1989
52 525.95 km
Eccentricity0.00038 ± 0.00016
0.33465551 ± 0.00000001 d
Inclination
  • 0.216 ± 0.014° (to Neptune equator)
  • 0.06° (to local Laplace plane)
Satellite ofNeptune
Physical characteristics
Dimensions(180±6) × (148±12) × (128±6) km[4]
75±3 km[4]
Volume~1.8×106 km3[a]
Mass~(0.71–1.4)×1018 kg[b]
Mean density
0.4–0.8 g/cm3[5]
~0.006–0.023 m/s2[c]
~0.032–0.054 km/s[d]
synchronous
zero
Albedo0.09[4][6]
Temperature~51 K mean (estimate)
22.0[6]

Despina /dɛˈspaɪnə/, also known as Neptune V, is the third-closest inner moon of Neptune. It is named after Greek mythological character Despoina, a nymph who was a daughter of Poseidon and Demeter.

  1. ^ Cite error: The named reference Willman-Neptune was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Jacobson2004 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Showalter2019 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Karkoschka2003 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference ZhangHamilton2008 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference jplssd was invoked but never defined (see the help page).


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