# How to find star location knowing latitude and LST

Newbie learning Astronomy and was curious how to locate a star giving a Latitude and LST. For example if my LST is 4:00 and my latitude is 20*N, how would I find where the Horsehead Nebula appears in the sky? The only formula I can think of is the Hour Angle formula..

HA = LST - RA

altitude = arcsin(sin(latitude) * sin(declination) + cos(latitude) * cos(latitude) * cos(HA))