Convert between equatorial coordinates (right ascension and declination) and the horizontal coordinates you actually point a telescope at (altitude and azimuth), for any place and moment.
Equatorial input
h
m
s
°
′
″
°
°
°
lat°
lon°
Horizontal result
Enter values and press Convert.
Results appear here as an instrument readout.
Results appear here as an instrument readout.
All-sky view — looking up; zenith at center, horizon at the rim
Azimuth is measured from north, increasing eastward (N 0°, E 90°). Positions are mean places, with no atmospheric refraction, nutation, or aberration applied.