Aul’Vex

Aul’Vex, or Craehlil I, is the innermost planet of the Craehlil System within the Orion Arm of the Milkyway Galaxy, located at 0.39 AU away from Craehlil. Aul’Vex is a scorched silicate world, stripped bare by stellar winds, tidal locking, and centuries of orbital decay. With surface temperatures exceeding 900°C on the day side and near-cryogenic shadows on the night side, Aul’Vex exhibits an extreme thermal dichotomy and near-constant tectonic grinding along its terminator zone. Its once-fractured crust has been repeatedly resurfaced by superheated silicate flows and core-driven mantle upheavals.

Aul’Vex

Astrographical Information

Galaxy

Milkyway

Galactic Arm

Orion

System

Craehlil System

Orbiting

Craehlil

Orbital position

First Planet

Orbital Distance

0.39 AU (58,343,169 km)

Orbital characteristics

Aphelion

0.41 AU (61,334,125 km)

Perihelion

0.37 AU (55,352,212 km)

Semi-major axis

0.39 AU (58,343,169 km)

Eccentricity

0.036

Orbital period (sidereal)

101.3 days

Average orbital speed

47.2 km/s

Mean anomaly

127.9°

Inclination

• 3.1° – Craehlil's equator;

• 1.2° – invariable plane;

• 2.4° – J2000 ecliptic

Longitude of ascending node

23.4°

Time of perihelion

11.5 days

Argument of perihelion

95.2°

Moon(s)

0

Physical Information

Diameter

8,172 km (5,078.4 mi)

Mean radius

4,086 km (2,539.2 mi)

Equatorial radius

4,106 km (2,551.3 mi)

Polar radius

4,065 km (2,527.0 mi)

Flattening

0.0100

Circumference

• 25,684 km; equatorial

• 25,531 km; meridional

Surface area 210,012,000 km²

• • Land: 210,012,000 km²

• • Water: 0 km² (0% of Aul’Vex's surface area)

Volume

3.026 × 10¹¹ km³

Mass

3.52 × 10²⁴ kg

Mean density

6.88 g/cm³

Surface Gravity

13.21 m/s²

Moment of inertia factor

0.309

Escape velocity

12.8 km/s

Synodic rotation period

Permanent day/night (tidally locked)

Sidereal rotation period

101.3 days (equal to orbital period)

Equatorial rotation velocity

~0 m/s (tidal lock)

Axial tilt

0.4°

Axial Precession

Negligible (rotational lock suppresses precession)

Albedo

• 0.12 geometric

• 0.09 Bond

Temperature 440–1,320 K

Surface Temperature

• -183°C (–297.4°F) Min

• ~507°C (944.6°F) Mean (day side)

• 937°C (1,718.6°F) Max

Surface absorbed dose rate

~1,520 μGy/h

Surface equivalent dose rate

~1,740 μSv/h

Apparent magnitude

–3.4" to 2.6"

Absolute magnitude (H)

6.22

Atmosphere

Surface pressure

Trace to ~0.001 atm (micro-atmospheric)

Composition by volume

• 61.4% Sodium vapor

• 17.2% Sulfur dioxide

• 6.8% Atomic oxygen

• 5.0% Silicate particulates

• 3.4% Argon

• <2.0% Ionized aluminum, trace volatiles

• 0.2% Industrial remnants (legacy nanocomposite haze)