Celestial Coordinates

• CURIE: gmeow:CelestialCoordinates
• IRI: https://blackcatinformatics.ca/gmeow/CelestialCoordinates
• Category: class
• Defined by: gmeow:slices/places
• Box roles: TBox role (What is this?)

A point on the celestial sphere expressed as right ascension, declination, and an optional epoch — frame-relative per Principle 11. The reference frame (ICRS, FK5, Galactic, etc.) is declared via gmeow:coordinateFrame.

Structure

Subclass of: gmeow:Entity, gufo:Object

Practical Pattern

Use gmeow:CelestialCoordinates as a specialized kind of gmeow:Entity, gufo:Object. Add statement metadata or a standpoint when the assertion needs provenance, confidence, or vantage.

Common Companion Terms

gmeow:Entity

Usage Advice

Use when

• Use for a point on the celestial sphere — right ascension, declination, optional epoch — when the sky frame (ICRS, FK5, Galactic) is explicit.

Avoid when

• Avoid for terrestrial points (GeoCoordinates) and avoid stating RA/Dec without gmeow:coordinateFrame and, for moving bodies, gmeow:celestialEpoch (Principle 11).

How to use

• Mint CelestialCoordinates with gmeow:rightAscension / gmeow:declination / gmeow:celestialEpoch and declare the frame via gmeow:coordinateFrame.

Examples

• ex:vegaCoords a gmeow:CelestialCoordinates; gmeow:rightAscension 279.23; gmeow:declination 38.78; gmeow:coordinateFrame gmeow:referenceFrameICRS.