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Vall

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Vall
Vall
Vall as seen from orbit.
Moon of Jool
Orbital Characteristics
Semi-major axis 43 152 000 m [Note 1]
Apoapsis 43 152 000 m [Note 1]
Periapsis 43 152 000 m [Note 1]
Orbital eccentricity 0
Orbital inclination 0 °
Argument of periapsis 0 °
Longitude of the ascending node 0 °
Mean anomaly 0.9 rad (at 0s UT)
Sidereal orbital period 105 962 s
1 d 5 h 26 m 2.1 s
Synodic orbital period 106069.5 s
Orbital Velocity 2558.8 m/s
Physical Characteristics
Equatorial radius 300 000 m
Surface area 1.1309734×1012 m2
Mass 3.1088028×1021 kg
Standard gravitational parameter 2.0748150×1011 m3/s2
Density 27 487.852 kg/m3
Surface gravity 2.31 m/s2 (0.235 g)
Escape velocity 1 176.10 m/s
Sidereal rotation period 105 962.09 s
1 d 5 h 26 m 2.1 s
Sidereal rotational velocity 17.789 m/s
Synchronous orbit 3 593.20 km
Sphere of influence 2 406 401.4 m[Note 1]
Highest elevation 7976 m
Atmospheric Characteristics
Atmosphere present × No
Scientific multiplier
Surface 12
Space 9

  1. 1.0 1.1 1.2 1.3 The distances are given from the bodies center not surface (unlike ingame)

Vall is one of the five natural satellites of Jool. Like the other large Joolian moons, Vall is tidally locked. Synchronous orbits around Vall are not possible, as they would lie outside of its SOI, at a radius of 3,893,254 meters.

Vall is KSP's analog to Jupiter's moon Europa.

Though the bodies have topical similarities, landing on Vall and returning is significantly more challenging than a landing on the Mün, due to the former's higher gravity and more uneven terrain.

According to former developer NovaSilisko, Vall was planned to be made more like Eeloo, with cracks in the ice and a more chaotic surface than in 0.20.2.[1]

Contents

In-game Description

Vall was one of the last Moons of Jool to be discovered. Frustrated scientists kept trying to wipe it off the lenses of their telescopes. Eventually after a rash of returned telescopes, Advanced Optics Co. finally decided to just tell them it was an actual object in the sky.

Kerbal Astronomical Society

Topology

Vall has an icy surface which is dominated by hilly lowland areas separated by mountain ridges, and ranges in elevation from 0 to 7976 m. There are almost no completely level areas, making it hard to find good landing spots.

Vall has some circular mountain ridges which could be remnants of impact craters, but they are heavily eroded, hinting that Vall has some geological activity, presumably in the form of cryovolcanism.

The surface color ranges between white and light blue. When terrain scatters are activated, large boulders with contrast-rich black and white surface patterns can be found on the surface.

Reference Frames

Rotational/Inertial transition 100 000 m
Warp Minimum Altitude
Any
5× 24 500 m
10× 24 500 m
50× 24 500 m
100× 40 000 m
1 000× 60 000 m
10 000× 80 000 m
100 000× 100 000 m

Gallery

Trivia

  • According to the Tracking Station information of Vall, it was one of the last moons of Jool to be discovered. This was because the Kerbal astronomers mistook the icy moon for a smudge. After multiple failed attempts to get rid of the "smudge", they figured out it was, in fact, a moon.

Changes

0.17
  • Initial Release

Notes

  1. Post in the forum by NovaSilisko
TinyKerbol.png TinyMoho.png TinyEve.png TinyKerbin.png TinyDuna.png TinyDres.png TinyJool.png TinyEeloo.png
Kerbol
(The Sun)
Moho Eve Kerbin Duna Dres Jool Eeloo
Gilly Mun
Minmus
Ike Laythe
Vall
Tylo
Bop
Pol