Field Rotation Calculator for Astrophotography

Copyright 2001 by Mark Christensen, Ph.D.
Unlimited license for personal and educational use.

Download the entire Excel Spreadsheet!

Introduction

The spreadsheet assumes the misalignment is northward, along the local meridian. To see the impact of other misalignments, the hour angle should be changed to reflect the difference. That is, if the misalignment is to the west, then 6 should be subtracted from the actual hour angle. This is not critical except for large miss-alignments or near the north celestial pole.

I hope the readers find the spreadsheet useful. Have fun!

Mark Christensen


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