A star is considered circumpolar if it never sets below the horizon from a particular location on Earth. This depends on the observer's latitude and the star's declination.

Here's how to determine the range of declination for circumpolar stars:

* Latitude: The higher the latitude, the more stars will appear circumpolar.

* Declination: Declination is the angular distance of a star north or south of the celestial equator.

The rule of thumb is:

* Stars with a declination greater than (90° - your latitude) will be circumpolar.

For example:

* If you are at a latitude of 40° North, stars with a declination greater than 50° North will be circumpolar (90° - 40° = 50°).

Therefore, the range of declination for circumpolar stars varies depending on your latitude.

Important Notes:

* North Pole: At the North Pole (latitude 90°), all stars with a declination greater than 0° are circumpolar.

* Equator: At the equator (latitude 0°), no stars are circumpolar.