If a star's azimuth is 90 degrees, it is located directly east on the horizon. An altitude of 45 degrees means that the star is positioned halfway up in the sky, forming a right angle with the horizon. Therefore, this star would be visible in the eastern sky at an angle that is halfway between the horizon and the zenith.
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.)
A star that is approximately 10,000 degrees Celsius is typically a type B main-sequence star. These stars are much hotter than the Sun, which has a surface temperature of about 5,500 degrees Celsius. B-type stars are known for their blue-white color and strong ultraviolet radiation, and they tend to be very luminous and massive. An example of such a star is Rigel, which has a surface temperature around 11,000 degrees Celsius.
Azimuth
The star closest to 10,000 degrees Celsius is typically considered to be Sirius B, the white dwarf companion of Sirius A. Sirius B has a surface temperature of about 25,000 degrees Fahrenheit (approximately 14,000 degrees Celsius), while Sirius A, the brighter of the two, has a surface temperature around 9,940 degrees Fahrenheit (about 5,500 degrees Celsius). Other hot stars, such as some O-type and B-type stars, can also reach temperatures near that range.
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.
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.
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.
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.
Azimuth = 315° (True) Altitude = 0
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.
That's the star's "azimuth".