Convert Right Ascension/Declination <==> Azimuth/Altitude

User Date / / user input
User Time : : user input
Time Zone Offset (HH) east   west of Greenwich
Daylight Savings Time (HH) subtract   add to time zone
Latitude (DD MM SS)   north   south
Longitude (DD MM SS)   east   west
Local Sideral Time (HH:MM:SS)
Epoch Year (YYYY) user input
Right Ascension (HH MM SS) "  user input
Declination (DD MM SS)   "  user input
Altitude (DD MM SS)   "  user input
Azimuth (DD MM SS)   "  user input
Tirion 2000 page
Uranometeria 2000 page
Millennium page

To obtain azimuth/altitude, fill in the Right Ascension/Declination and click the [Calculate] button. To obtain Right Ascension/Declination, fill in Azimuth/Altitude and click the [Calculate] button.

Note: Formulas were obtained from the Paul Schlyter web site, Computing planetary positions - a tutorial http://stjarnhimlen.se/comp/tutorial.html.

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Copyright 2005 Muskegon Astronomical Society, Inc.

This web page was last updated 08/20/14