Difference between revisions of "Duna"
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'''Duna''' is the fourth planet of the [[Kerbol]] star system. It is the Mars analog for Kerbal Space Program and is mostly red with polar icecaps. | '''Duna''' is the fourth planet of the [[Kerbol]] star system. It is the Mars analog for Kerbal Space Program and is mostly red with polar icecaps. | ||
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== Topography == | == Topography == | ||
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[[File:Duna_isa_mapsat.png|thumb|left|A topographic map of Duna made with the ISA MapSat plugin]] | [[File:Duna_isa_mapsat.png|thumb|left|A topographic map of Duna made with the ISA MapSat plugin]] | ||
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Duna is a iron-rich planet which has greatly varying land altitude, the consequence of which is very difficult judgment of a safe landing position. Its mountainous ranges are a peril to landing craft, especially considering the thin atmosphere, where very little aerobraking can be done safely. It is important to slow one's ship down before coming into the atmosphere, to ensure a safe decent. Its two poles are very expansive and are the result of a thin atmosphere. | Duna is a iron-rich planet which has greatly varying land altitude, the consequence of which is very difficult judgment of a safe landing position. Its mountainous ranges are a peril to landing craft, especially considering the thin atmosphere, where very little aerobraking can be done safely. It is important to slow one's ship down before coming into the atmosphere, to ensure a safe decent. Its two poles are very expansive and are the result of a thin atmosphere. | ||
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Duna's atmosphere begins at approximately 41km and is only 20% as dense as [[Kerbin]]'s. (A [[LV-N Atomic Rocket Engine|nuclear engine]] has a specific impulse of 220 at 1 atm, 800 in vacuum, and 684.2 at Duna altitude 5 m. This means the Duna atmospheric pressure at 5 m is roughly 1 - (684.2 - 220) / (800 - 220) = 0.1997 atm.) | Duna's atmosphere begins at approximately 41km and is only 20% as dense as [[Kerbin]]'s. (A [[LV-N Atomic Rocket Engine|nuclear engine]] has a specific impulse of 220 at 1 atm, 800 in vacuum, and 684.2 at Duna altitude 5 m. This means the Duna atmospheric pressure at 5 m is roughly 1 - (684.2 - 220) / (800 - 220) = 0.1997 atm.) | ||
| − | Parachutes work at lower efficiency than on Kerbin, making powered descent necessary when landing from orbit (unless your craft is just a pod with a parachute). | + | Parachutes work at lower efficiency than on Kerbin, making powered descent necessary when landing from orbit (unless your craft is a glider or just a pod with a parachute). |
== Natural Satellites == | == Natural Satellites == | ||
| − | Duna's only natural satellite is the moon [[Ike]], and due to | + | Duna's only natural satellite is the moon [[Ike]], and due to its size and closeness to the planet, they are tidally locked to each other. |
== See Also == | == See Also == | ||
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* [[Asteroid]] | * [[Asteroid]] | ||
| + | == Gallery == | ||
| + | <gallery> | ||
| + | File:ISA_over_Duna.png|ISA satellite in orbit over Duna being used to map the planet surface. | ||
| + | File:DunaSurface.png|Duna's surface at Dawn. | ||
| + | File:Duna_projection.png|A false color Mercator projection of Duna's surface using MapSat. | ||
| + | </gallery> | ||
Revision as of 18:05, 27 September 2012
Duna is the fourth planet of the Kerbol star system. It is the Mars analog for Kerbal Space Program and is mostly red with polar icecaps.
Topography
Duna is a iron-rich planet which has greatly varying land altitude, the consequence of which is very difficult judgment of a safe landing position. Its mountainous ranges are a peril to landing craft, especially considering the thin atmosphere, where very little aerobraking can be done safely. It is important to slow one's ship down before coming into the atmosphere, to ensure a safe decent. Its two poles are very expansive and are the result of a thin atmosphere.
Atmosphere
Duna's atmosphere begins at approximately 41km and is only 20% as dense as Kerbin's. (A nuclear engine has a specific impulse of 220 at 1 atm, 800 in vacuum, and 684.2 at Duna altitude 5 m. This means the Duna atmospheric pressure at 5 m is roughly 1 - (684.2 - 220) / (800 - 220) = 0.1997 atm.)
Parachutes work at lower efficiency than on Kerbin, making powered descent necessary when landing from orbit (unless your craft is a glider or just a pod with a parachute).
Natural Satellites
Duna's only natural satellite is the moon Ike, and due to its size and closeness to the planet, they are tidally locked to each other.
See Also
Gallery
ISA satellite in orbit over Duna being used to map the planet surface.
Duna's surface at Dawn.
- Duna projection.png
A false color Mercator projection of Duna's surface using MapSat.
