Halimede (moon)

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Halimede
T. Grav, W. Fraser
  • D. Milisavljevic
    • Discovery dateAugust 14, 2002
    Designations
    Designation
    		Neptune IX
    Pronunciation/hæləˈmiːdiː/[3]
    Named after
    		Ἁλιμήδη Halimēdē
    S/2002 N 1
    AdjectivesHalimedean /ˌhæləməˈdiːən/
    SymbolGive it, NASA!
    Orbital characteristics[4]
    Epoch June 10, 2003
    16,611,000 km
    Eccentricity0.2646
    1879.08 d
    (5.14 a)
    Inclination134.1°
    Satellite ofNeptune
    GroupOuter Neptunian Moons
    Physical characteristics
    Mean diameter
    		62 km (for albedo 0.04)[5]
    Albedo0.04 (assumed)[5]
    Spectral type
    		neutral (grey)
    B-V=0.73 R-V=0.35[6]


    Halimede

    Tommy Grav, Wesley C. Fraser and Dan Milisavljevic on August 14, 2002.[7]

    Name

    Halimede imaged by the Very Large Telescope during follow-up observations on 3 September 2002

    Halimede, like many of the outer satellites of

    Doris
    . Before the announcement of its name on February 3, 2007 (IAUC 8802), Halimede was known by the provisional designation S/2002 N 1.

    Orbit

    Irregular satellites of Neptune.

    Halimede has the second most

    Laomedeia are similar to Halimede but they both have prograde orbits unlike Halimede which has a retrograde orbit.[9]

    Physical characteristics

    Halimede is about 62 kilometers in diameter (assuming an

    visible light. Given the very similar colour of the satellite to that of Nereid together with the high probability (41%[7]) of collision in the past lifespan of the Solar System, it has been suggested that the satellite could be a fragment of Nereid.[6]

    References

    1. ^ JPL (2011-07-21). "Planetary Satellite Discovery Circumstances". Jet Propulsion Laboratory. Retrieved 2011-10-24.
    2. ^ Green, Daniel W. E. (January 13, 2003). "Satellites of Neptune". IAU Circular. 8047. Retrieved 2011-10-24.
    3. ^ Noah Webster (1884) A Practical Dictionary of the English Language
    4. ^ Jacobson, R. A. (2008). "NEP078 – JPL satellite ephemeris". Planetary Satellite Mean Orbital Parameters. Retrieved 2009-09-23.
    5. ^ a b c
      S2CID 154011
      .
    6. ^ a b Grav, Tommy;
      S2CID 15706906
      .
    7. ^ a b
      S2CID 4412380
      . Retrieved 24 October 2011.
    8. ^ Williams, Dr. David R. (2008-01-22). "Neptunian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 2011-11-03.
    9. ^ "In Depth | Halimede". NASA Solar System Exploration. Retrieved 2020-11-10.

    External links

    Wikimedia Commons has media related to Halimede (moon).
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