Dataset · Aurin system

The Aurin system in numbers

Every body of the Aurin system, the setting of COLONIZED, with the canon's figures and a few derived from them: one star, four planets, ten moons, a captured asteroid and two faction stations. Free to cite with a link.

Figures as of 14 October 2026

The system at a glance

Star: Aurin, a G1V yellow-white dwarf of about 130,000 km in radius and 5,900 K
Bodies with a surface: Fifteen: four planets, ten moons and the captured asteroid Ashkar
Scale: One astronomical unit of the lore is 15 million km, about a tenth of a real one
Years: From 50.6 days on Ormek to 524 on Kaldrek; Ithera's year is 200 standard days
Light from Aurin: About 20 seconds to Ormek, 50 to Ithera and 95 to Kaldrek
Stations: El Pináculo and El Fondeadero, at Ithera's L4 and L5 points, sixty degrees ahead and behind

Every body

Canon figures from the Codex. Escape velocity is derived from radius and gravity (√2gR). Moons orbit their planet; planets and stations orbit Aurin.

Body	Type	Orbits	Radius (km)	Gravity (m/s²)	Escape (km/s)	Day (h)	Orbit (km)	Period	Air
Aurin	Star	—	130,000	—	—	—	—	—	—
Ormek	Planet	Aurin	6,050	8.88	10.37	6	6,000,000	50.6 d	Breathable
Pyra	Moon	Ormek	420	0.388	0.57	3	18,000	3 h	Tenuous
Cinera	Moon	Ormek	620	0.399	0.7	5	37,442	9 h	Tenuous
Kharsis	Planet	Aurin	6,300	8.98	10.64	4	10,500,000	117 d	Breathable
Kravane	Moon	Kharsis	1,150	1.06	1.56	3	47,622	1.375 h	Tenuous
Kharun	Moon	Kharsis	780	0.698	1.04	2.75	75,595	2.75 h	Tenuous
Ashkar	Asteroid	Kharsis	45	0.034	0.06	2.5	120,000	5.5 h	None
Erran	Moon	Kharsis	1,000	0.867	1.32	—	199,991	11.83 h	Thin
Ithera	Planet	Aurin	6,000	9.23	10.52	5	15,000,000	200 d	Breathable
Melvara	Moon	Ithera	1,950	1.91	2.73	3.5	150,803	0.5 h	Breathable
Tirane	Moon	Ithera	1,500	1.38	2.03	5.5	239,385	1 h	Tenuous
Selvane	Moon	Ithera	500	0.419	0.65	2	380,000	2 h	Tenuous
El Pináculo (Delvar, L4)	Station	Aurin	—	—	—	—	15,000,000	200 d	—
El Fondeadero (Trasvar, L5)	Station	Aurin	—	—	—	—	15,000,000	200 d	—
Kaldrek	Planet	Aurin	6,400	10.2	11.43	6	28,500,000	524 d	Breathable
Renvar	Moon	Kaldrek	400	0.212	0.41	4	26,000	4 h	Tenuous
Ordrek	Moon	Kaldrek	750	0.692	1.02	4.5	54,082	12 h	Tenuous

Four years that obey Kepler

The planets' years follow Kepler's third law: the square of the period grows with the cube of the distance. Taking Ithera's 200 days as the reference, the law predicts the other three almost to the decimal.

Planet	Canon year (days)	Kepler's prediction (days)
Ormek	50.6	50.6
Kharsis	117	117.1
Ithera	200	200
Kaldrek	524	523.8

And moons that do not

The moons are the exception. They complete their orbits in hours where the same laws, with their measured masses, ask for days: Melvara goes round Ithera in half an hour, Selvane in two. Nobody in the system works out moon trajectories from masses; pilots use an empirical ephemeris, the Phase Table, measured body by body.

Read the Phase Table entry

How long light takes

From Aurin to each planet, and the apparent size of the star in each sky (derived from distance and radius).

Planet	Distance to Aurin	Light from Aurin	Aurin in the sky
Ormek	6 million km	20 s	2.482°
Kharsis	10.5 million km	35 s	1.419°
Ithera	15 million km	50 s	0.993°
Kaldrek	28.5 million km	95 s	0.523°

Distance calculator

Pick two bodies to see how near and how far apart they can be and how long light, or a message, takes between them. Orbits are treated as circles; moons take their planet's position, plus or minus their own orbit.

Use these figures

The figures on this page come from the canon of COLONIZED, as recorded in the Codex. You can quote them or use the dataset with a link to this page.

COLONIZED, “The Aurin system in numbers”, https://colonized.work/data/aurin-system/, as of 14 October 2026.

Download the dataset (JSON)Terms of citation The Aurin system in the Codex Guide to the planets and moons How the system fits in the engine

Canon figures describe the universe; what can be visited in each alpha wave will be listed in the alpha notes.