Assuming the subject is magnetic declination the difference between the north pole and the true north pole this difference, is the magnetic declination, there is not information on what purpose it serves.
moons declination reachesonly 18° N or S each month..
Corvus the Crow is centered roughly on -20 degrees in Declination.
Right ascension: 8 h Declination: +5°
Right ascension: 21 h Declination: −20°
Right ascension: 11 h Declination: +15°
The declination of the constellation Gemini is +20.
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
Magnet declination is the angle between magnetic north and true north. Declination is considered positive east of truth north and negative when west.
Right ascension is 21 h and declination is −36°.
moons declination reachesonly 18° N or S each month..
Right ascension: 8-15 h Declination: −20°
Corvus the Crow is centered roughly on -20 degrees in Declination.
It is important to take the declination into account when one is closer to the poles because declination varies more as a function of longitude and not the latitude. In North America, if one goes toward the east coast, the declination increases to the west. If one goes to the west coast, the declination increases to the east.
15 degrees, 27 minutes East declination.
Right ascension: 21 h Declination: −20°
Right ascension: 8 h Declination: +5°
Right ascension: 11 h Declination: +15°