What is the declination and right ascension of the north celestial pole?

Clement Streitmatter asked, updated on October 15th, 2021; Topic: right ascension
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Polaris is located at RA 2h 41m 39s, Dec. +89° 15′ 51″. Because the stars circle about the sky every 24 hours, right ascension or RA ranges from 0h to 24h.

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Even more, what are the coordinates of the north celestial pole?

If you stand on the Earth's equator, the celestial equator passes overhead. Stand on the North Pole, latitude 90° N, and overhead will be the north celestial pole, declination +90°.

Additional, what is the declination of your local Zenith? The declination at the zenith is equal to the site's latitude; therefore, the zenith for an observer at 45°N will be +45°.

Although, how do you find the declination of a star?

The declination of the star is measured from the celestial equator, and so the transit altitude of our star is given by 90-Φ+δ.

What is the most common celestial coordinate system?

equatorial coordinate system

10 Related Questions Answered

What is declination equivalent to?

Declination (DEC) is the celestial sphere's equivalent of latitude and it is expressed in degrees, as is latitude. For DEC, + and - refer to north and south, respectively. The celestial equator is 0° DEC, and the poles are +90° and -90°.

Why is it called the north celestial pole?

Finding the north celestial pole The north celestial pole currently is within one degree of the bright star Polaris (named from the Latin stella polaris, meaning "pole star").

What are the three celestial coordinates?

Coordinate systemsCoordinate systemCenter point (origin)CoordinatesLongitude
EquatorialCenter of the Earth (geocentric), or Sun (heliocentric)Right ascension (α) or hour angle (h)
EclipticEcliptic longitude (λ)
GalacticCenter of the SunGalactic longitude (l)

Which star is closest to the north celestial pole?


What does a declination of 0 mean?

Declination, in astronomy, the angular distance of a body north or south of the celestial equator. ... North declination is considered positive and south, negative. Thus, +90° declination marks the north celestial pole, 0° the celestial equator, and -90° the south celestial pole.

Does declination mean decline?

Look at the noun declination and you can see the verb decline, which means "to lessen," "to slope down," and "to refuse." Declination is the process of doing any of these things. ... In astronomy, it's also the distance between an object and the celestial equator, measured at an angle.

What does negative declination mean?

west declination

How do you find declination angle?

The Sun declination angle, δ, has the range: – 23.5° < δ < + 23.5° during its yearly cycle . The Sun declination angle is δ = – 23.5° on the winter solstice. sin δ = 0.39795⋅ cos [ 0.98563⋅ ( N – 173 ) ] ( 1 ) where the argument of the cosine here is in degrees and N denotes the number of days since January 1.

How many hours of declination exist on earth?

The total range of right ascension is 24 hrs = 360 deg / 15 deg/hr. The 15 deg/hr conversion factor arises from the rotation rate of the Earth. Declination is analogous to latitude and is measured as north or south of the celestial equator.

How do you calculate declination?

Multiply it by -23.44, the tilt of the Earth's axis in degrees. The result is the solar declination in degrees for that day of the year. From the example, the cosine of 53.2603 is 0.5982; multiply it by -23.44 to get -14.02 degrees.