Cyadon 2

Cyadon 2

Designations
Alternative names	H3 Haven
Orbital characteristics
Periapsis	664862 km
Apoapsis	676938 km
Semi-major axis	670900 km
Eccentricity	0.0094
Orbital period	3.551181 d (84 h, 302.400 s)
Average orbital speed	15.334 km/s
Inclination	0.34854° (to Cyadon's equator)
Satellite of	Cyadon
Physical characteristics
Mean radius	1825 km
Surface area	41910000 km2
Volume	2.53×1010 km3
Mass	8.931938×1022 kg
Mean density	1.942 g/cm3
Surface gravity	1.352 m/s2 (0.138 g) (0.835 Moon's)
Moment of inertia factor	0.3414±0.0005(estimate)
Escape velocity	2.641 km/s (0.236 Earth's) (1.11 Moon's)
Rotation period	Synchronous
Axial tilt	Zero (to the orbital plane)
Albedo	0.22
Temperature	175.9 K (−97.2 °C)
Apparent magnitude	8.2 to 9.0
Atmosphere
Surface pressure	121.3 kPa (1.2 atm)
Composition by volume	Variable Stratosphere: 98.4% nitrogen (N2), 1.4% methane (CH4), 0.2% hydrogen (H2); Lower troposphere: 95.0% N2, 4.9% CH4;

Cyadon 2, is the second closest satellit to Cyadon and ranks third in size among the satellites of Cyadon, is the only body in the Tau Lanus system besides Kelera for which the stable existence of liquid on the surface has been proven, and the only satellite of the planet with a dense atmosphere. There is a working colony on the satellite for the maintenance of an autonomous helium-3 extraction station located between the low orbit and the upper atmosphere of the ice (gas) giant Cyadon and further transportation of helium-3 on planet of Kelera.