Difference between revisions of "Eve"

Revision as of 23:56, 10 January 2013

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Eve is the second planet from Kerbol and is the second largest body orbiting it. It is purple in appearance. It has one small moon, a captured asteroid called Gilly.

Eve is the closest planet to Kerbin and the easiest to reach, requiring the least delta-v of any planet. Having a similar size to Kerbin gives it a large gravity well. Its thick atmosphere makes aerocaptures and landings easy, but also makes return missions from the sea level of Eve nearly impossible as it requires the most delta-V of any celestial body with a solid surface.

Topography

A topographic map of Eve made with the ISA MapSat plugin Eve has several oceans and large, flat continents with a few mountain peaks. There is a distinctly large crater in the western hemisphere. The surface looks like purple sand dunes. There are several large mountains with heights exceeding 10,000 meters (making them the only places where ascents to orbit are feasible).

Atmosphere

A comparison of the atmospheres of Eve and Kerbin Eve's atmosphere begins at 97,500 m and is extremely dense: at 11,250 m, it's as thick as Kerbin's atmosphere at sea level (1 atm), and at Eve sea level the atmospheric pressure is 5 atm. Its atmospheric pressure fades exponentially, with a scale height of 7000 m. In general, the atmospheric pressure on Eve at an altitude expressed in meters is:[1] ${\displaystyle p_{e}=5\ e^{-altitude/7000}}$ From within Eve's atmosphere, the sky appears indigo during nighttime. During dawn and dusk, the sky is green. The atmosphere is possibly composed of iodine, given its purple coloration. Jet engines do not function in Eve's atmosphere, since it contains no oxygen — they make noise and consume fuel, but they produce no thrust. As with version 0.17.1 of aerobraking maneuver arriving from Kerbin and resulting in to orbit around Eve - without using fuel for braking - can be done aiming for at periapsis at aproximately 72500m. The following table gives terminal velocities at different Eve altitudes. These are also the velocities at which a ship should travel for a fuel-optimal ascent from Eve, given the game's model of atmospheric drag.[2] Altitude (m) Velocity (m/s) 0 58.4 1000 62.5 5000 82.0 10000 115 15000 162 20000 228 30000 450 40000 888 50000 1.76×103 60000 3.47×103

Natural Satellites

Eve's only natural satellite is the tiny captured asteroid Gilly in a highly eccentric and inclined orbit. Gilly is currently the smallest celestial body in the Kerbol system.

Orbital Statistics

A geosynchronous orbit of Eve requires an altitude of 10373.195 km and a velocity of 858.95 m/s. For a semisynchronous orbit of ½ Eve day (11.25 hours or 40500 seconds) an orbit of 6275.676 km above Eve is needed with a velocity of 1082.2 m/s.

Reference Frames

Rotational/Inertial transition: 100,000? m

Gallery

• 

  Orbiting Eve.

• Eve sky surface.png

  Eve's sky from the surface.

• 

  Eve and Gilly.

• 

  A topografic height map of Eve made with the ISA MapSat plugin.

• 

  Eve landscape shot.

• 

  Another Eve landscape shot.

• Screenshot91.png

  A Kerbal dropped in from space will survive impact with Eve, even when reaching speeds over the speed of sound.

Changes

0.18

• A new art pass was done on Eve

0.17

• Initial Release

Notes

1. ↑ A nuclear engine has a specific impulse of 220 in 1 atm or higher, 800 in vacuum, and the following at various Eve altitudes:

   altitude (m)	11263	11268	11322	11598	11896	12200	12799	13868	14586	15292	16725	18711	22800	23556	32000	38000	43000	51963
   specific impulse	220	220.2	224.6	246.9	269.9	292.4	334.0	400.0	438.8	473.4	533.7	600.2	688.2	699.8	769.8	787.3	793.8	798.3

2. ↑ http://forum.kerbalspaceprogram.com/showthread.php/6664-Mini-challenge-max-altitude-with-this-supplied-spacecraft?p=100912&viewfull=1#post100912

v t e Kerbol System Kerbol Moho Eve Kerbin Duna Dres Jool Eeloo (The Sun)   Gilly Mun Minmus Ike   Laythe Vall Tylo Bop Pol