| Heba | ||
 | ||
| Heba as seen from orbit. | ||
| Planet of Valentine | ||
| Orbital Characteristics | ||
| Semi-major axis | 1 493 455 354 m [Note 1] | |
| Apoapsis | 1 493 455 354 m [Note 1] | |
| Periapsis | 1 493 455 354 m [Note 1] | |
| Orbital eccentricity | 0 | |
| Orbital inclination | 1.38 ° | |
| Argument of periapsis | 85.9 ° | |
| Longitude of the ascending node | 27.97 ° | |
| Mean anomaly | 41 rad (at 0s UT) | |
| Sidereal orbital period | 503 704 s | |
| 23 d 1 h 55 m 4.1 s | ||
| Synodic orbital period | 503 711.1 s | |
| Orbital velocity | 18 629 m/s | |
| Physical Characteristics | ||
| Equatorial radius | 12 514 069 m | |
| Equatorial circumference | 78 628 214 m | |
| Surface area | 1.9679178×1015 m2 | |
| Mass | 2.6692199×1025 kg | |
| Standard gravitational parameter | 1.7814587×1015 m3/s2 | |
| Density | 3 251.6224 kg/m3 | |
| Surface gravity | 11.4 m/s2 (1.16 g) | |
| Escape velocity | 16 873.44 m/s | |
| Sidereal rotation period | 503 704.13 s | |
| 23 d 1 h 55 m 4.1 s | ||
| Sidereal rotational velocity | 156.10 m/s | |
| Synchronous orbit | 212 869.55 km | |
| Sphere of influence | 1.5440749×108 m [Note 1] | |
| Atmospheric Characteristics | ||
| Atmosphere present | ✓ Yes | |
| Atmospheric pressure | 1 013.25 kPa | |
| 10 atm | ||
| Atmospheric height | 250 000 m | |
| 1.0×10-5 atm | ||
| Temperaturemin | -271.57 °C 1.58 K | |
| Temperaturemax | 168.85 °C 442 K | |
| Oxygen present | × No | |
| Scientific multiplier | ||
| Surface | N/A | |
| Splashed | N/A | |
| Lower atmosphere | 11 | |
| Upper atmosphere | 9 | |
| Near space | 8 | |
| Outer space | 6 | |
| Recovery | 16 | |
|
| ||
Heba is a gas giant and the first planet of the Valentine system in the planet pack Extrasolar. It only has one moon called Serex.
Stationary orbit around Heba is not possible — it would require an altitude of 212 869.55 km, outside of Heba's sphere of influence.
In-Game Description[]
| “ | Heba is the largest planet in the Valentine system. It was the first planet to be discovered in this system. Due to Heba's massive size, it is sometimes visible from the surface of the neighboring planet Solyth. — Kerbal Astronomical Society |
” |
Atmosphere[]
Heba has a dense atmosphere with a datum level pressure of about 10 atmospheres and a depth of 250 000 meters. Compared to the atmosphere of Kerbin, Heba's atmosphere has 10 times the surface pressure, and 3,5 times the depth. At an altitude of around 77 000 meters on Heba, the atmospheric pressure is the same as at sea level on Kerbin (1 atm).
Like all other atmospheres in the game, Heba's atmosphere fades exponentially as altitude increases. The scale height varies with altitude. The pressure-altitude profile is globally constant and independent of temperature. The following table gives the atmospheric pressure at various altitudes above the datum level.
| Altitude (m) | Pressure (Pa) | Pressure (atm) |
|---|---|---|
| 0 | 1 013 250 | 10.000 |
| 10 000 | 809 544 | 7.990 |
| 20 000 | 634 137 | 6.258 |
| 30 000 | 487 298 | 4.809 |
| 40 000 | 365 911 | 3.611 |
| 50 000 | 267 655 | 2.642 |
| 60 000 | 191 486 | 1.890 |
| 70 000 | 131 776 | 1.301 |
| 80 000 | 86 607 | 0.855 |
| 90 000 | 55 048 | 0.543 |
| 100 000 | 36 145 | 0.357 |
| 120 000 | 17 028 | 0.168 |
| 140 000 | 7 632 | 0.075 |
| 160 000 | 4 139 | 0.041 |
| 180 000 | 2 598 | 0.026 |
| 200 000 | 1 340 | 0.013 |
| 225 000 | 340.0 | 0.003 |
| 250 000 | 0 | 0.000 |
Natural Satellites[]
Heba has only one natural satellite:
- Serex, a lava moon which was molten when it had an atmosphere.
Synchronous Orbit around Serex is impossible, as it lies outside the Sphere of Influence of the moon, as is common with tidally locked bodies.
Biomes[]
Heba has a total of 5 (atmosphere and space-only) biomes.
Biome list[]
 Heba biome map |
|
Reference frames[]
| Time warp | Minimum Altitude |
|---|---|
| 1× | Any |
| 5× | 250 000 m (above the atmosphere) |
| 10× | 275 000 m |
| 50× | 300 000 m |
| 100× | 300 000 m |
| 1 000× | 300 000 m |
| 10 000× | 600 000 m |
| 100 000× | 800 000 m |