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The right ascension of Polaris is increasing quickly—in AD 2000 it was 2.5h, but when it gets closest to the north celestial pole in 2100 its right ascension will be 6h. The North Ecliptic Pole in Draco and the South Ecliptic Pole in Dorado are always at right ascension 18 h and 6 h respectively.
Right ascension: 18 h 44 m 20.34589 s [1] Declination +39° 40′ 12.4533 ... both binaries have moved only a few degrees in position angle. The component stars of ...
In this case, the longitude is also called the right ascension of the ascending node (RAAN). The angle is measured eastwards (or, as seen from the north, counterclockwise) from the FPA to the node. [2] [3] An alternative is the local time of the ascending node (LTAN), based on the local mean time at which the spacecraft crosses the equator.
Right ascension is usually measured in sidereal hours, minutes and seconds instead of degrees, a result of the method of measuring right ascensions by timing the passage of objects across the meridian as the Earth rotates. There are 360° / 24 h = 15° in one hour of right ascension, and 24 h of right ascension around the entire ...
18.33 ± 0.82 [6] km/s ... the 5,055th star between 12°S and 13°S counting from 0h right ascension. ... UY Scuti is located a few degrees north of the A-type star ...
In the equatorial coordinate system, the right ascension coordinates of these borders lie between 18 h 14 m and 19 h 28 m, while the declination coordinates are between +25.66° and +47.71°. [12] The International Astronomical Union (IAU) adopted the three-letter abbreviation "Lyr" for the constellation in 1922. [13]
Right ascension: 18 h 30 m 56.2 s: Declination: −25° 29′ 45″ ... It is a half degree east of Lambda Sagittarii. It is a member of the Milky Way. [3]
Right ascension: 18 h 23 m 41 s: Declination: −30° 21′ 39″ ... It is located 0.8 degrees southeast of the star Delta Sagittarii, [7] and is about 1.17 ...