It is not 90 degrees. It is 89 degrees 16 minutes, approx.
Declination can range from +90 degrees (north) to -90 degrees (south).
Yes, Polaris is very close to being at the celestial pole, which is approximately plus 90 degrees declination in the sky. It is used as a navigational aid for celestial navigation and is a good guide for finding true north in the Northern Hemisphere.
The declination of the star Arcturus is 19 degrees, 11 minutes, while Polaris has a declination of 89 degrees 15 minutes. Their angular separation is the distance between them, approximately 71 degrees.
The "declination" of a star is its position in the sky on the celestial sphere, which stays the same for any observer.You may be thinking about how high Polaris is above the horizon.That's its "altitude".The altitude of Polaris always equals the latitude of the observer.That's been a great help to seafarers for centuries.Polaris has a declination of nearly 90 degrees.From Glasgow, its altitude in the northern sky is equal to the latitude of Glasgow.The latitude of Glasgow is about 55.9 degrees.So, the altitude of Polaris in Glasgow is about 55.9 degrees.
The range of values for celestial declination is from -90 degrees to +90 degrees. A declination of 0 degrees corresponds to the celestial equator, while +90 degrees denotes the north celestial pole and -90 degrees denotes the south celestial pole. This range allows for the precise positioning of celestial objects in the sky relative to Earth's equatorial plane.
In the celestial coordinate system Polaris is located at the following coordinates: Right Ascension: 02 Hours 48.2 Minutes (measured from 0-24 Hour format) Declination: +89 Degrees 19 Minutes (measured from +90 to -90 Degree format)
Declination, which measures the angle between the direction of a celestial object and the celestial equator, ranges from +90 degrees to -90 degrees. A declination of +90 degrees indicates the North Celestial Pole, while -90 degrees indicates the South Celestial Pole. Values between these extremes represent the position of celestial objects in the sky relative to the celestial equator.
I'm assuming that you mean "How far from the NCP is something whose declination is 50 degrees N?" In that case, the best way to visualize it is by looking at a globe of earth. The north pole is at 90 degrees N latitude. Something that's 50 degrees N latitude is therefore 40 degrees BELOW the north pole (the UK fits this description). Likewise, something with a declination of 50 degrees N is 40 degrees away from the NCP.
On February 5th, Polaris has a declination of approximately +89 degrees 15 minutes and a right ascension of about 2 hours 31 minutes. These values may vary slightly depending on the year and time of observation.
90 degrees
The Celestial Poles are the infinite extension of the North and South Poles from the Earth into space. The North Star or Polaris, is within 1 degree of the North Celestial Pole. There is no equivalent star for the South Celestial Pole.
To calculate the magnetic bearing, you would subtract the declination from the true bearing if the declination is east, or add the declination if the declination is west. In this case, since the declination is 8 degrees east, you would subtract the declination from the true bearing of 180 degrees. Magnetic bearing = True bearing - Declination Magnetic bearing = 180 degrees - 8 degrees Magnetic bearing = 172 degrees