Polaris Position Calculator

Polaris, also known as the North Star, is a bright star that appears nearly stationary in the night sky because it is aligned very closely with Earth's rotational axis. This calculator helps you determine Polaris's position in the sky based on your latitude, date, and time.

How to Use This Calculator

To find Polaris's position in the sky:

Enter your latitude in decimal degrees (positive for northern hemisphere, negative for southern hemisphere)
Select the current date and time
Click "Calculate" to see Polaris's altitude and azimuth

The calculator will show you:

Polaris's altitude (how high it appears in the sky)
Polaris's azimuth (its direction from north)
A visual representation of its position

How Polaris Moves in the Sky

Polaris's position changes slightly throughout the year due to Earth's axial precession, which causes the stars to appear to move over long periods. The calculator accounts for this movement by using the current date in its calculations.

Note: For most practical purposes, Polaris appears stationary because its movement is very slow (about 1 degree every 72 years).

Formula Used

The calculator uses the following formula to determine Polaris's position:

Altitude (h) = 90° - latitude

Azimuth (A) = 0° (north)

These values are adjusted slightly for the current date to account for Earth's axial precession.

The formula assumes you're observing from the northern hemisphere. For southern hemisphere observers, Polaris will appear below the horizon.

Worked Example

Let's calculate Polaris's position for someone at 40.7°N latitude on June 21, 2023 at midnight.

Enter latitude: 40.7
Select date: June 21, 2023
Select time: 00:00
Click "Calculate"

The calculator will show:

Altitude: 49.3° (Polaris appears about halfway between the horizon and the zenith)
Azimuth: 0° (directly north)

This means you would look due north and about halfway up the sky to find Polaris.

Frequently Asked Questions

Why does Polaris appear to move slightly over time?: Polaris's position changes very slowly due to Earth's axial precession, which causes the stars to appear to move over thousands of years. The calculator accounts for this movement.
Can I use this calculator for southern hemisphere observers?: Yes, but Polaris will appear below the horizon. The calculator will show negative altitude values for locations south of about 23.5°S latitude.
How accurate are the results?: The calculator provides approximate positions. For precise astronomical observations, professional equipment and software are recommended.
Why is Polaris important?: Polaris is important for navigation because it appears nearly stationary in the night sky, making it a reliable reference point for determining direction.
Can I use this calculator on my mobile device?: Yes, the calculator is fully responsive and works on all devices.