General Statistics

• Type: Terrestrial
• Mean orbital distance (AU): 1.00
• Eccentricity: 0.020
• Axial tilt (�): 23.4
• Year (Earth days): 365.2
• Angular diameter of star (�): 0.53
• Angular diameter of moon (�): 0.52
• Solar day (hr): 24.00
• Radius (km): 6370
• 1/Ellipticity: 294.1
• Rotation period (hr): 23.93
• Temperature range of orbit (�C): -38.6 to -82.2

Lithosphere

• Mass (Earth Masses): 1.00
• Maximum Mass (Earth Masses): 3211.7
• Density (kg/m�): 5523
• Albedo: 0.33
• Inertia Factor: 0.34
• Typical surface gravity (m/s�): 9.83
• Equatorial surface gravity (m/s�): 9.81
• Polar surface gravity (m/s�): 9.86
• Escape velocity (km/s): 11.19
• Rotation period (hr): 23.9
• Shortest possible period (hr): 2.63
• Geosynchronous orbit (km): 35724
• Plate tectonics end (Gyr): 5.10
• Maximum mountain height (m): 16570
• Horizon distance (m): 3091

Atmosphere and Ocean

• Atmospheric pressure (mbar): 1013
• Minimum RMM for atmosphere (g): 2.54
• Atmospheric RMM (g): 29.00
• Specific heat capacity (cp) (J mol-1 K-1): 29.1
• Speed of sound at surface (m/s): 340.5
• Temperature range of orbit (Celsius): -17.7 to -22.8
• Greenhouse effect (Celsius): 36.00
• Typical surface temperature (Celsius): 15.8
• Scale height (m): 8426
• Dry adiabatic lapse rate (�C/km): 9.80
• f (Coriolis effect) at 45�N * 1E4 :1.03
• Mid-ocean tide height (m): 0.51

Moon (Ambrosia)

• Mass (Earth masses): 0.012
• Radius (km): 1743
• Surface gravity (m/s�): 1.58
• Escape velocity (km/s): 2.3
• Synodic month (Earth days): 29.62
• Angular diameter of planet (�): 1.90
• Roche Limit (km): 18576

It is theorized that Welstar travels around the Sun (known to some as the Great Orb), rather than the sun traveling around Welstar. The Great Orb travels once around Welstar every 365 days visiting the twelve Lairs of the Zodiac in an appointed round, which never varies. The moon of Welstar is called Ambrosia. It waxes and wanes in alternating cycles of 30 and 31 days, upon which the months are based.