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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 48 m 54.637 s [1] Declination: 00° 35′ 02.86 ... it took twelve days to fade three magnitudes and then 18.6 years to fade to quiescence. [4]
The 4U 1820-30 system, consisting of a neutron star and a white dwarf, compared to the Earth and the Sun (bottom). The neutron star is tied with PSR J1748−2446ad as the fastest rotating pulsar known, both making 716 revolutions per second.
Right ascension: 18 h 44 m 22.78056 s [1] Declination +39° 36′ 45.7851 ...
Epsilon Aquilae, Latinized from ε Aquilae, is the Bayer designation for a binary star [11] system in the equatorial constellation of Aquila, near the western constellation boundary with Hercules.
N119's location within the Large Magellanic Cloud. With a right ascension of 5 h 18 m 45 s and a declination of −69° 14′ 03″, [1] this nebula may be found in the constellation of Dorado about 160 kly (50 kpc) away.
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 ...
It is derived from the Arabic name Rijl Jauzah al Yusrā, "the left leg (foot) of Jauzah" (i.e. rijl meaning "leg, foot"), [74] which can be traced to the 10th century. [75] " Jauzah" was a proper name for Orion; an alternative Arabic name was رجل الجبار rijl al-jabbār , "the foot of the great one", from which stems the rarely used ...