Enter the parallax angle (arc-seconds) into the Star Distance Calculator. The calculator will evaluate and display the Star Distance. 

Star Distance Formula

The following formula is used to calculate the Star Distance. 

Dstar = 1 / P
  • Where Dstar is the Star Distance (parsecs)
  • P is the parallax angle (arc-seconds) 

To calculate the star distance, divide 1 by the parallax angle.

How to Calculate Star Distance?

The following example problems outline how to calculate Star Distance.

Example Problem #1:

  1. First, determine the parallax angle (arc-seconds).
    • The parallax angle (arc-seconds) is given as: 15.6.
  2. Finally, calculate the Star Distance using the equation above: 

Dstar = 1 / P

The values given above are inserted into the equation below and the solution is calculated:

Dstar = 1 / 15.6 = .064 (parsecs)

Example Problem #2: 

For this problem, the variables needed are provided below:

parallax angle (arc-seconds) = 80

${V2} = ${number 4}

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

Dstar = 1 / P = ?