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What is the parallax of Barnard’s Star?

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Diagram illustrating how astronomers calculate the distance to a star using parallax: Earth is shown in two positions on opposite sides of its orbit around the Sun, with lines extending to a nearby star X and further to distant background stars. The apparent shift in star X's position, measured as angle A, is used to determine its distance, with the baseline labeled as 186,000,000 miles. — Parallax Calculating stellar distances.

The parallax of Barnard’s star is 0.54831 arc seconds.1

In astronomy, parallax is a method used to determine the distance to nearby stars by measuring their angular displacement against a background of more distant, fixed stars when viewed from opposite sides of Earth’s orbit. Because parallax is inversely proportional to distance, this measurement allows astronomers to calculate the star's distance in parsecs using the formula $d = 1 / p$ , where $p$ is the parallax in arc seconds. Based on its parallax, Barnard’s star is located at a distance of approximately 6 light-years from the Sun.12