Infernas

Infernas
Infernas as seen from orbit.
Moon of Cyran
Orbital Characteristics
Semi-major axis		15 434 225 m
Apoapsis		15 434 225 m
Periapsis		15 434 225 m
Orbital eccentricity		0
Orbital inclination		0 °
Argument of periapsis		0 °
Longitude of the ascending node		0 °
Mean anomaly		0 rad (at 0s UT)
Sidereal orbital period		11 664 s
		3 h 14 m 23.6 s
Synodic orbital period		11 666.8 s
Orbital velocity		8 314 m/s
Longest time eclipsed		2 023 s
Physical Characteristics
Equatorial radius		150 000 m
Equatorial circumference		942 478 m
Surface area		2.8274334×1011 m2
Mass		5.6203156×1020 kg
Standard gravitational parameter		3.7510436×1010 m3/s2
Density		39 755.601 kg/m3
Surface gravity		1.67 m/s2 (0.17 g)
Escape velocity		707.21 m/s
Sidereal rotation period		11 663.592 s
		3 h 14 m 23.6 s
Sidereal rotational velocity		80.805 m/s
Synchronous orbit		355.61 km
Sphere of influence		255 203.03 m
Atmospheric Characteristics
Atmosphere present		✓ Yes
Atmospheric pressure		6.75534 kPa
		0.06667 atm
Atmospheric height		50 000 m
		6.7×10-8 atm
Temperaturemin		59.03 °C 332.18 K
Temperaturemax		146.85 °C 420 K
Oxygen present		× No
Scientific multiplier
Surface		9.5
Splashed		10
Lower atmosphere		9
Upper atmosphere		8.5
Near space		8
Outer space		7.5
Recovery		7

Infernas is a hot, rocky moon added in the 'Planet Cyran' planet pack, and the innermost moon orbiting Cyran. It's a hot inferno, hence it's name. Infernas is unique for being a moon that is breaking apart and even using a particle system to show this.

In-Game Description

“

A moon orbiting way too close to Cyran for comfort. This moon is literally being broken apart by Cyran's gravitational pull. The debris has formed a ring around the large gas giant, and in a few hundreds of thousands of years, that ring will be all that's left of this moon. Visit while you can! — Kerbal Astronomical Society

”

Characteristics

Physical Properties

Infernas' surface is covered in basalt and sulphur-rich compounds, and its Cyran-facing face has been melted and stripped away to reveal an ocean of lava which will destroy any craft that get too close. The rest of the moon is comprised of rough, basaltic hills while the lava ocean is ringed by high cliffs and contains several islands at its edges that can be safely landed on.

Atmosphere

Infernas has a thin atmosphere identical to that of Duna - it was denser in the past but Cyran has pulled most of it away. The remaining atmosphere consists of Carbon Dioxide, Sulfur Dioxide, Argon and Hydrogen, with a surface pressure of 6.755kPa.

Altitude (m)	Pressure (Pa)	Pressure (atm)
0	6 755	0.067
2 500	5 136	0.051
5 000	3 774	0.037
7 500	2 663	0.026
10 000	1 797	0.018
15 000	716.9	0.007
20 000	241.0	0.002
25 000	91.73	0.001
30 000	32.90	0.000
40 000	4.918	0.000
50 000	0	0.000

Biomes

Infernas has five biomes, based on distance from the Cyran-facing side:

Infernas biome map

Broken Poles Intact Area Burning Badlands Searing Coast Molten Wasteland

Quote

Quote from the author of the Planet Cyran mod:

“

Ah, Infernas. I actually came up with the idea when reading an article about Triton, a moon of Neptune. Triton's orbit is decaying, and thus it'll eventually drop below the Roche limit and will be pulled apart by tidal forces. That gave me an idea: a moon that is molten on the side facing it's parent planet. I knew that with Kopernicus' particle system I could actually make the moon look like it's breaking apart. Fun fact: Infernas' heightmap is actually made from a highly edited colormap exported from Space Engine, but the rest is built from code only — The White Guardian

”

Reference Frames

Time warp	Minimum Altitude
1×	Any
5×	50 000 m (above the atmosphere)
10×	50 000 m (above the atmosphere)
50×	50 000 m (above the atmosphere)
100×	50 000 m (above the atmosphere)
1 000×	60 000 m
10 000×	70 000 m
100 000×	80 000 m

Trivia

• According to calculation, for Infernas the Roche limit equals 5769359.55 m. Currently Infernas orbits at roughly twice that distance, but it was placed this far out on purpose: if Infernas would actually orbit at the roche limit, Cyran's pull would be overwhelming that of Infernas, making it impossible to land.
• According to the author (as stated above) Infernas has been inspired by real-life Triton, which is estimated to suffer the same fate as Infernas, although Tritan has a retrograde orbit and is therefore theorized to be a captured moon, unlike Infernas which has likely formed around Cyran but was pushed inwards by the gravity of the other moons.
• Infernas is unique for being the only Kopernicus planet or moon to add story to the origin of a nearby ring system and actually using the ring system of it's parent planet, in Infernas' case the particles it emits are dragged into the rings.
• The 'Planet Cyran' planet pack comes with a flag showing Infernas based off the 'Minimalistic' flag texture by SQUAD.