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Azimuth is the angle, typically using true north as zero degrees to an object from viewers location. An altitude (if expressed as an elevation angle from the viewer) provides a line of sight to an object in space. If you were standing at a point and facing true north and there was an airplane flying at 20,000 ft and you knew the elevation angle you could compute the range and have an (X,Y,Z) location for the object.
That's very possible. It simply means that in order to find it, you face southeast, and then look straight ahead and some angle above the horizon. Viewed from the north or south pole, every star in your sky will have an azimuth of 135 degrees once every day. (But first you'd have to decide on a reference direction to designate as zero azimuth, since 'southeast' doesn't exist at the poles.)
Azimuth
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As of 2021, Betelgeuse has an azimuth of around 225 degrees and an altitude of about 27 degrees when observed from the northern hemisphere. These values will change throughout the night and over the course of the year due to the Earth's rotation and orbit.
The altitude of a star that is setting due west is 0 degrees, as it is on the horizon. The azimuth would be 270 degrees if we consider 0 degrees as north and increase in a clockwise direction.
An object seen halfway between the horizon and the zenith has an altitude of 45 degrees.An object seen due east of the observer has an azimuth of 90 degrees.
Azimuth = 315° (True) Altitude = 0
A star with an azimuth of 180 degrees would be due south, and an altitude of 20 degrees would place it 20 degrees above the horizon. So, the star would be in the southern part of the sky, 20 degrees above the horizon.
due south and slightly above the horizon
Defining a stars location is done with a coordinate system just as one would use a X & Y system for graphing. Locating a star involves what compass direction the star can be found (azimuth) and how high above the visible horizon (altitude).
If you spend any time outside at night looking at the stars, you may have noticed that they're constantly moving. The Big Dipper turns completely around the Pole Star every day, almost like the hand of a huge clock. So, if you pick any star at all in the sky, except for the Pole Star itself, the altitude and azimuth of any star you pick are constantly changing.
The distance of a star on the horizon, measured in degrees, is called its azimuth. Azimuth is the angle measured clockwise from true north to the star's position in the sky. It can range from 0° (north) to 360° (back to north).
Azimuth is the horizontal angular distance measured clockwise from true north, while altitude is the vertical angular distance above the horizon. Together, these coordinates help locate a star's position in the sky.
Recording the location of a star requires a measurement of altitude, azimuth, and time.
A star at the celestial equator will move 15 degrees in altitude per hour, and 15 arcseconds in 1 second of time. This is because the celestial equator intersects the celestial sphere at 90 degrees from the north and south celestial poles, so the stars appear to move in circles around the celestial poles.