Difference between revisions of "Jool"

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[[File:Jool.png|thumb|Jool in 0.17.]]
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{{Planetbox
'''Jool''' is a [http://en.wikipedia.org/wiki/Gas_giant gas giant] and the fifth planet of the [[Kerbol]]ar star system. [[File:Jool.jpg|right|thumb|A probe visiting the gas giant.]]
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|Class=Planet
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|File=Jool.jpg
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|Parent=[[Kerbol]]
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|Axism=6.87e10
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|Axisau=0.46
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|orbitv=??
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|longitude=??
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|argperi=??
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|anomaly=??
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|peroidh=29,072,500
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|periodd=1,211,354
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|soikm=2,455,985
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|soirad=409
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|radius=6000
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|mass=4.236e24
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|density=4.68
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|gravityv=7.84
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|gravityg=.8
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|gparam=2.8254e14
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|esc=9704
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|rotation=??
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|day=??
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|geosync=~7000
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|geostation=??
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}}
  
== Characteristics ==
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[[File:Jool.png|thumb|left|Jool in 0.17.]]
 
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'''Jool''' is a [http://en.wikipedia.org/wiki/Gas_giant gas giant] and the fifth planet of the [[Kerbol]]ar star system.  
*[http://en.wikipedia.org/wiki/Radius Equatorial Radius]: 6000 km
 
 
 
*[http://en.wikipedia.org/wiki/Mass Mass]: 4.236e24 kg
 
 
 
*[http://en.wikipedia.org/wiki/Density Density]: 4.68 g/cm³
 
 
 
*[http://en.wikipedia.org/wiki/Surface_gravity Surface Gravity]: 7.84 m/s² (0.8 Gs)
 
 
 
*[http://en.wikipedia.org/wiki/Standard_gravitational_parameter Gravitational parameter]: 2.8254e14 m³/s²
 
 
 
*[http://en.wikipedia.org/wiki/Escape_velocity Escape velocity] from surface: 9704 m/s
 
 
 
*[http://en.wikipedia.org/wiki/Rotation_period Sidereal Rotation Period]: ... hours; [http://en.wikipedia.org/wiki/Rotation Rotation]: ... [http://en.wikipedia.org/wiki/Degree_(angle) degrees] per hour, or ... m/s at the [http://en.wikipedia.org/wiki/Equator equator]
 
 
 
* [http://en.wikipedia.org/wiki/Solar_day Solar Day]: ... hours, or ... hours, ... seconds.
 
 
 
*[http://en.wikipedia.org/wiki/Geosynchronous_orbit Synchronous Orbit] altitude: ~7000 km; [http://en.wikipedia.org/wiki/Geostationary_orbit Stationary Orbit] velocity: ... m/s
 
 
 
== Orbital Characteristics ==
 
[[File:JoolLanding.png|thumb|A successful landing on Jool, which was destroyed about two seconds later.]]
 
*[http://en.wikipedia.org/wiki/Focus_(geometry) Parent Body]: [[Kerbol]]
 
 
 
*[http://en.wikipedia.org/wiki/Semi-major_axis Semi-Major Axis]: 6.87e10 m or 0.46 [http://en.wikipedia.org/wiki/Astronomical_unit Astronomical Units (A.U.)]
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_eccentricity Eccentricity]: 0.05
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_inclination Inclination]: 1.3°
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_speed Velocity]: ... m/s
 
 
 
*[http://en.wikipedia.org/wiki/Longitude_of_the_ascending_node Longitude of Ascending Node]: ...°
 
 
 
*[http://en.wikipedia.org/wiki/Argument_of_periapsis Argument of Periapsis]: ...° 
 
 
 
*[http://en.wikipedia.org/wiki/Mean_anomaly Mean Anomaly] at [http://en.wikipedia.org/wiki/Epoch_(astronomy) Epoch] UT = ...
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_period Orbital Period]: 29,072,500 hours, or 1,211,354 [http://en.wikipedia.org/wiki/Earth Earth] days
 
 
 
*[http://en.wikipedia.org/wiki/Sphere_of_influence_%28astrodynamics%29 Sphere of influence]: 2,455,985 km, or 409 body radii.
 
  
 
== Atmosphere ==
 
== Atmosphere ==
[[File:JoolAtmosphere.png|thumb|Aerobraking in Jool's atmosphere.]]
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[[File:JoolAtmosphere.png|thumb|left|Aerobraking in Jool's atmosphere.]]
 
Although Jool has a radius ten times greater than [[Kerbin]], its atmosphere begins approximately twice as high (138.2 km).  It is also extremely dense, well suited for aerobraking from a high-speed inter-planetary intercept.
 
Although Jool has a radius ten times greater than [[Kerbin]], its atmosphere begins approximately twice as high (138.2 km).  It is also extremely dense, well suited for aerobraking from a high-speed inter-planetary intercept.
  

Revision as of 15:15, 26 September 2012

Template:Planetbox

Jool in 0.17.

Jool is a gas giant and the fifth planet of the Kerbolar star system.

Atmosphere

Aerobraking in Jool's atmosphere.

Although Jool has a radius ten times greater than Kerbin, its atmosphere begins approximately twice as high (138.2 km). It is also extremely dense, well suited for aerobraking from a high-speed inter-planetary intercept.

Closer to the surface, the physics of the game start to break down. Due to its extremely thick atmosphere, terminal velocity is so low that lighter spacecraft will not even need parachutes or retrorockets. It is not impossible to land on it's solid surface, though spacecraft are inevitably and invariably devoured by the Kraken. If a kerbonaut is put on EVA he will not be destroyed, making long term landings feasible.

Natural Satellites

Jool has four natural satellites:

The ocean moon Laythe, about to eclipse Jool.
  • The ocean moon Laythe, which has an atmosphere and is both the largest and closest to Jool. Due to it's high orbital velocity, it is somewhat challenging to reach.
  • The ice moon Vall, which is the second largest and second closest. It's orbital path and velocity sit almost exactly between Layth and Tylo.
  • The rocky moon Tylo, similar to Kerbin's Mun, is the third body orbiting Jool. It is perhaps the easiest of the four to reach, with a stable orbit, large gravity well, and (relatively) slow orbital velocity.
  • The captured asteroid Bop, the smallest body orbiting Jool. Due to it's distant, erratic orbit and low gravity, it is also challenging to reach.


Laythe, Vall, and Tylo are in a Laplace resonance, with orbital periods of 1:2:4 respectively.