RA (Right Ascension) – the distance of a point east of the First Point of Aries, measured along the celestial equator and expressed in hours, minutes, and seconds.
Dec (Declination) – the angular distance of a point north or south of the celestial equator.
Azimuth – the direction of a celestial object from the observer, expressed as the angular distance from the north or south point of the horizon to the point at which a vertical circle passing through the object intersects the horizon.
Altitude – the distance measurement, usually in the vertical or “up” direction, between a reference datum and a point or object.
Local Hour Angle (LHA) – it is the angle between the meridian of the observer and the meridian of the object you are pointing at. This can be used to tell how far the object is before or after the meridian.