Basilicus

**Worldbuilding**

**on a galactic scale**

About Basilicus | New to Basilicus? | Building guide | Basilicus Prime Galaxy | Star system list

*This article refers to the 3-dimension polar coordinate system used by the Helics themselves. For the Sector-Based system used by the Intergalactic Navigation Consortium, see Galactic Coordinates (Basilicus).*

The Basilicus Prime Coordinate System was designed by the Helics to describe the location of a point within the Basilicus Prime Galaxy using just three numbers. It has come to be used to specify exact points in the galaxy within the scientific community and to an extent is still standard amongst the Helics. However, the more localised scope of Galactic Coordinates has become standard for common use elsewhere.

## Basis[]

The Basilicus Prime Coordinate System is based on three-dimensional polar coordinates.

### Units of Length[]

The unit of length for the radius coordinate is the Hold, from Helis Customary Measurements.

### Units of Angle[]

The unit of angle for the two angular coordinates is the Decan, defined as a full rotation about the circle divided by the product of all whole numbers 1 through 10. 3628800 Decans is equal to one full circle.

### First Reference Point[]

**The center of Black Hole Inatus**

The first coordinate in the Basilicus Prime Coordinate System is the distance from the center of mass of Black Hole Inatus to the star in question.

### Second Reference Point[]

**The plane of rotation of Basilicus Prime**

The second coordinate in the Basilicus Prime Coordinate System is the angle between the third reference point and the star, in the direction of rotation of the Basilicus Prime Galaxy.

### Third Reference Point[]

**A curve passing through the center of the Ionro Arm, within the second reference point**

The third coordinate in the Basilicus Prime Coordinate System is the angle between the second reference point and the star, with Helis in the positive direction.

## Coordinates[]

- The distance from the center of mass of Black Hole Inatus to the star, in Holds
- The angle from the center of the Ionro Arm to the star, in the direction of rotation of the Basilicus Prime Galaxy, in Decans.
- The angle from the plane of rotation of Basilicus Prime to the star, with Helis in the positive direction, in Decans.

### Example[]

The Helis System is 2226.1 holds from the center of Black Hole Inatus. It is 1484 holds away from the center of the Ionro Arm at that distance, and 989.36 holdsaway from the plane parallel to the rotation of Inatus that passes through the center of Inatus. Helis is in the same direction as the Helis System (of course), and lagging behind most of the other stars in the Ionro Arm in orbiting Inatus.

Therefore, Helis is at (2226, -299828, 265989), or (2226, 3328972, 265989).