Ornak

Ornak, also known as Craehlil IV, is the fourth planet of the Craehlil System within the Orion Arm of the Milkyway Galaxy, orbiting Craehlil at approximately 2.18 AU. Classified as a dwarf gas giant, Ornak possesses a tenuous ring system, a degraded magnetosphere, and a dense, layered atmosphere dominated by hydrogen, ammonia, and silicate aerosols. While lacking the massive scale of true gas giants, Ornak remains geologically and chemically dynamic due to internal heating from tidal stresses and radioactive decay in its core. Its atmosphere churns with turbulent bands, thermal updrafts, and intermittent storm systems that flicker with violet electrical discharges. Below its visible cloud decks lies a semi-metallic hydrogen layer where pressures crush and distort even advanced probe shells. Despite its hostile conditions and limited strategic mass, Ornak supports a network of orbital stations and atmospheric skimmers maintained by a mix of extraction guilds and autonomous salvage operators. These operations target trace deuterium reserves, volatile gas complexes, and suspended nano-material residues left by prior industrial test platforms. Its erratic magnetic field occasionally exposes stations to lethal bursts of solar radiation, making habitation cycles tightly regulated and dependent on pre-set orbital windows. Ornak is also used as a deep-space calibration zone and covert dumping ground for outdated tech. Though not colonized in the conventional sense, its resource field and isolation make it a critical, if overlooked, node in the system's extraction economy.

Ornak

Astrographical Information

Galaxy

Milky Way

Galactic Arm

Orion

System

Craehlil System

Orbiting

Craehlil

Orbital position

Fourth Planet

Orbital Distance

2.18 AU (326,135,360 km)

Orbital characteristics

Aphelion 2.25 AU (336,094,207 km)

Perihelion 2.11 AU (316,176,513 km)

Semi-major axis 2.18 AU (326,135,360 km)

Eccentricity 0.057

Orbital period (sidereal) 931.4 days

Average orbital speed 19.1 km/s

Mean anomaly 140.6°

Inclination

  • 1.9° – Craehlil's equator;

  • 1.3° – invariable plane;

  • 2.5° – J2000 ecliptic

Longitude of ascending node 82.7°

Time of perihelion 104.3 days

Argument of perihelion 96.5°

Moon(s) 163 (unstable orbits)

Physical Information

Diameter 62,270 km (38,701.6 mi)

Mean radius 31,135 km (19,350.8 mi)

Equatorial radius 32,012 km (19,887.9 mi)

Polar radius 29,983 km (18,813.7 mi)

Flattening 0.0634

Circumference

  • 201,187 km; equatorial

  • 188,310 km; meridional

Surface area 12.18 × 10⁹ km² Volume 1.26 × 10¹⁵ km³ Mass 2.18 × 10²⁶ kg Mean density 1.92 g/cm³ Surface Gravity 19.5 m/s² (varies by depth in pressure gradient) Moment of inertia factor 0.245 Escape velocity 33.4 km/s Synodic rotation period 18.6 hours Sidereal rotation period 17.8 hours Equatorial rotation velocity 3,136.4 m/s Axial tilt 11.2°

Axial Precession 10,900 years (modest magnetic-induced wobble)

Albedo

  • 0.34 geometric

  • 0.22 Bond

Temperature 71–448 K Surface Temperature

  • -170°C (–274°F) Min

  • –108°C (–162°F) Mean

  • –42°C (–44°F) Max (core-adjacent tropospheric boundary layer)

Surface absorbed dose rate 46.8 μGy/h

Surface equivalent dose rate 55.3 μSv/h

Apparent magnitude –2.0" to 3.8"

Absolute magnitude (H) 4.17

Atmosphere

Surface pressure

Not applicable (no defined surface; pressures exceed 1,800,000 kPa in lower layers)

Composition by volume

  • 73.2% Hydrogen

  • 19.4% Helium

  • 3.1% Ammonia

  • 1.8% Methane

  • 1.1% Trace hydrocarbons

  • 0.7% Silicate aerosols

  • 0.4% Water vapor (upper cloud bands)

  • 0.3% Ionized sulfur compounds

  • ~0.1% Industrial residuals (salvage dispersal and debris emissions)


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