Zheth

Zheth

Astrographical Information

Milky Way

Orion

Craehlil System

Craehlil

Fifth Planet

4.21 AUs (630,833,055 km)

Orbital characteristics

Aphelion 4.32 AU (647,493,230 km)

Perihelion 4.10 AU (614,172,880 km)

Semi-major axis 4.21 AU (630,833,055 km)

Eccentricity 0.073

Orbital period (sidereal) 2,964.7 days

Average orbital speed 13.9 km/s

Mean anomaly 236.5°

• 1.8° – Craehlil's equator;

• 0.9° – invariable plane;

• 2.4° – J2000 ecliptic

Longitude of ascending node 143.6°

Time of perihelion 412.5 days

Argument of perihelion 91.7°

Moon(s) 3

Physical Information

Diameter 10,992 km (6,832.7 mi)

Mean radius 5,496 km (3,416.4 mi)

Equatorial radius 5,509 km (3,424.5 mi)

Polar radius 5,485 km (3,408.2 mi)

Flattening 0.0044

• 34,600 km; equatorial

• 34,448 km; meridional

• Land: 100% exposed crustal metal

• Water: 0% (no known hydrosphere)

Volume 6.933 × 10¹¹ km³

Mass 5.41 × 10²⁴ kg

Mean density 7.11 g/cm³

Surface Gravity 13.5 m/s²

Moment of inertia factor 0.310

Escape velocity 13.1 km/s

Synodic rotation period 57.8 Hours

Sidereal rotation period 54.9 Hours

Equatorial rotation velocity 298.2 m/s

Axial tilt 7.6°

Axial Precession 32,100 years (minor due to lack of atmospheric drag)

• 0.42 geometric

• 0.31 Bond

Temperature 36–211 K

• -237°C (-395°F) Min

• -185°C (-301°F) Mean

• -62°C (-79.6°F) Max

Surface absorbed dose rate 0.8 μGy/h

Surface equivalent dose rate 1.1 μSv/h

Apparent magnitude +2.2" to +6.1"

Absolute magnitude (H) 6.91

Atmosphere

0.004 kPa; ~0 atm (trace residual gas)

• 82.1% Argon

• 7.6% Neon

• 4.3% Methane (ice-trapped release events)

• 3.5% Helium

• 2.0% Volatile residues (metallo-organic offgassing, industrial byproducts)

• 0.5% Xenon and trace gases (residuals from prior orbital industry)