Sight Reduction

This page allows you to compute sight reductions. Try Lat 39 ° 50.6 ´ N, Dec 23 ° 8.4 ´ N, LHA 8 ° 18.1 ´ N which gives Hc = 71 ° 52.8 ´ Z = 154 ° 43.7 ´

1.	Enter your Latitude (L)	°	´	°
2.	Enter the Declination of the body (D)	°	´	°
3.	Enter the Hour Angle of the body (LHA or t)	°	´	°

4.	Zenith Distance (z)	°	°	´
5.	Calculated Altitude Hc ( = 90-z )	°	°	´
6.	P Polar Distance (co-D) of body	°	°	´
7.	Z azimuth (interior) angle of body	°	°	´
8.	Zn azimuth angle of body (from true north)	°	°	´