Altazimuth Coordinates Calculator with Tracking Rates
Hour angle (Sidereal time - R.A.) =
Declination =
Latitude =
Include refraction



Azimuth Altitude Field rotation
Position (degrees) = 248.956 1.818 47.672
Refraction (degrees) = 0.377
Tracking rate (arcseconds/second) = 9.772 -9.275 3.846
Change in tracking rate (arcseconds/second/second) = -0.000228 -0.000169 -0.000523

Notes:

This calculator outputs the altazimuth coordinates along with the tracking rates and the change in the tracking rate. Use the change in tracking rates to determine when an update to the tracking rates is required. There are no corrections applied to the coordinates such as precession and refraction.

Hours can be entered in a variety of formats. For example, '05h 12m 20.2sec', or '5 12 20.2' or '5:12:20.2' or simply ,'5' for 5 hrs. Decimals can be used anywhere, e.g., '5.5h' is 5h 30m. Any reasonable spelling or shorthand of hours, minutes and seconds can be used. Radians can also be used, e.g., 1.2 radians or 1.2rad or 1.2r.
Degrees can be entered in a variety of formats. For example, '+41°16'10.0"' or '41d 16m 10s' or '41 16 10' or '41:16:10' or simply '4' for 4 degrees. Decimals can be used anywhere, e.g., '5.5' is 5d 30m. Any reasonable spelling or shorthand of degrees, minutes and seconds can be used. Radians can also be used, e.g., 1.2 radians or 1.2rad or 1.2r.

Mel Bartels