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{| cellpadding="2" cellspacing="0" style="margin:25px 0 0 10px; border:3px solid lightsteelblue;width:250px; font-size:90%; font-family:'Arial','Helvetica'; float: right; clear: right;"Pluto in Orbiter"
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'''Hydra''' (S/2005 P1) is a natural satellite of [[Pluto]].
!bgcolor="lightsteelblue" colspan="2" align="center" |Hydra
 
|-
 
|colspan="2" align="center"|[[Image:Hydra-PlutoandMoonsZip-Orbiter2006P1.jpg|Hydra|240px]]
 
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|colspan="2" align="center"|'''Hydra from ''PlutoandMoons.zip'' in Orbiter 2006P1'''
 
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!bgcolor="lightsteelblue" colspan="2"|Designation
 
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|Name||align="right"|Hydra
 
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|width="30%"|Reference body||align="right" width="30%"|134340 Pluto
 
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|width="30%"|Number of satellites||align="right" width="30%"|
 
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!bgcolor="lightsteelblue" colspan="2"|Planetary mean orbits
 
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|width="30%"|Epoch||align="right" width="50%"|2002.88980151
 
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|width="30%"|Semimajor axis (a)||align="right" width="50%"|64780350.2435684 m
 
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|width="30%"|Eccentricity (e)||align="right" width="30%"|0.00527055475115776
 
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|width="30%"|Inclination (i)||align="right" width="30%"|0.249324421879577° <br> (0.00435153206743 radian)
 
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|width="30%"|Longitude of the ascending node (LAN, ☊)||align="right" width="30%"|30.4138815781564° <br> (0.530822371850478 radian)
 
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|width="30%"|Longitude of periapsis (ϖ)||align="right" width="30%"|336.913168368482° <br> (5.880244081356023 radian)
 
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|width="30%"|Mean longitude (L)||align="right" width="30%"|99.523168368531° <br> (1.73700697004754 radian)
 
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!bgcolor="lightsteelblue" colspan="2"|Selected physical parameters
 
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|width="30%"|Mean radius||align="right" width="30%"|64835.3502435684 m
 
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|width="30%"|Mass||align="right" width="30%"|1.25578958899498×10<sup>20</sup> kg
 
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|width="30%"|Sidereal rotation period||align="right" width="30%"|3510404.90311891104 sec (40.6297 hours)
 
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|width="30%"|SidRotOffset||align="right" width="30%"|0
 
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|width="30%"|Obliquity||align="right" width="30%"|96.145° (1.67804680932995 radian)
 
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|width="30%"|LAN||align="right" width="30%"|43.046° (0.7512944298135 radian)
 
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|width="30%"|Note||align="right" width="30%"|*Elements given are from Hyra.cfg (PlutoandMoons.zip)
 
|}
 
 
 
Hydra is the second largest natural satellite of [[Pluto]] after [[Charon]]. It was discovered in images by the [[w:Hubble Space Telescope|Hubble Space Telescope]] in May 2005 and was named after [[w:Lernaean Hydra|Hydra]], the nine-headed serpent in [[w:Greek mythology|Greek mythology]].
 
 
 
== Hydra in Orbiter ==
 
Hydra was introduced to Orbiter with the release of ''Nix-Hydra.zip'' in August 2009.
 
 
 
{| class="wikitable" style="text-align: center"
 
|colspan="8"|<center>'''Orbiter versions and add-ons which include Hydra'''</center>
 
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!Add-on!!Source!!Version!!Author!!Type!!Release Date!!Compatibility!!Wiki article
 
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|[https://www.orbiter-forum.com/resources/pluto-and-moons.978/ Pluto and Moons]||O-F Resources||2010-05-13||Piper||Scenery||13 May 2010||||
 
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|[https://www.orbiter-forum.com/resources/orbital-correction-for-pluto-and-moons.1388/ Orbital correction for Pluto and moons]||O-F Resources||2009-11-25||Unknown OHM Addon Developer||Scenery||25 November 2009||||
 
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|[https://www.orbiter-forum.com/resources/pluto-minor-moons.2251/ Pluto Minor Moons]||O-F Resources||2009-08-21||DagoO||Scenery||22 August 2009||||
 
|}
 
 
 
== Gallery ==
 
<gallery widths="100" heights="100">
 
Hydra-NixHydrazip-Orbiter2006P1.jpg|<center>Hydra from ''Nix-Hydra.zip'' in Orbiter 2006P1
 
Hydra-PlutoandMoonsZip-Orbiter2006P1.jpg|<center>Hydra from ''PlutoandMoons.zip'' in Orbiter 2006P1</center>
 
Hydra reprocessed.png|<center>Image of Hydra from the [[w:New Horizons|New Horizons]] spacecraft taken July 2015<br>from Wikimedia Commons</center>
 
Pluto and its satellites (2005).jpg|<center>Pluto and three satellites taken by [[w:Hubble Space Telescope|Hubble]]<br>from Wikimedia Commons in 2005</center>
 
</gallery>
 
  
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[[Category: Articles]]
 
{{Nsat-Stub}}
 
{{Nsat-Stub}}
 
{{PlutoMoons}}
 
{{PlutoMoons}}
{{SolarSystem}}
 
 
[[Category:Articles]]
 
[[Category:Celestial bodies]]
 
[[Category:Solar System]]
 
[[Category:Natural satellites]]
 

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