A 3-star alignment on a Celestron NexStar telescope helps improve the accuracy of the telescope's tracking and GoTo capabilities.
Here's a step-by-step guide to completing a 3-star alignment:
Set up your telescope: Place your telescope on a level surface, and make sure it is properly balanced. Extend the tripod legs and secure them.
Attach the telescope: Mount the telescope on the tripod, making sure it is properly secured.
Align the finder scope: In daylight, aim the telescope at a distant object (e.g., a tree or building) and center it in the eyepiece. Then adjust the finder scope until the object is centered in its view.