Hydra

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Hydra
Hydra
Hydra from Nix-Hydra.zip in Orbiter 2006P1
Designation
Name Hydra
Reference body 134340 Pluto
Number of satellites
Planetary mean orbits
Epoch 38.8, J39
Semimajor axis (a) 78400000 m
Eccentricity (e) 0.0051
Inclination (i) 19.480565034448°
(0.34 radian)
Longitude of the ascending node (LAN, ☊) 53.0076487827642°
(0.925158 radian)
Longitude of periapsis (ϖ) 224.066662237591°
(3.910701 radian)
Mean longitude (L) 238.928729077048°
(4.170093 radian)
Selected physical parameters
Mean radius 253000 m
Mass 2×1020 kg
Sidereal rotation period 22994.1 sec (6.38725 hours)
SidRotOffset 0
Obliquity 0° (0 radian)
Note *Elements given are from Hyra.cfg (Nix-Hydra.zip)

Hydra is the second largest natural satellite of Pluto after Charon. It was discovered in images by the Hubble Space Telescope in May 2005 and was named after Hydra, the nine-headed serpent in Greek mythology.

Hydra in Orbiter

Hydra was introduced to Orbiter with the release of Nix-Hydra.zip in August 2009.

Orbiter versions and add-ons which include Hydra
Add-on Source Version Author Type Release Date Compatibility Wiki article
Orbital correction for Pluto and moons O-F Resources 2009-11-25 Unknown OHM Addon Developer Scenery 25 November 2009
Pluto Minor Moons O-F Resources 2009-08-21 DagoO Scenery 22 August 2009

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