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Corona Borealis
Corona Borealis
List of stars in Corona Borealis
Abbreviation CrB
Genitive Coronae Borealis
Pronunciation /kɵˈroʊnə bɒriˈælɨs/, genitive /kɵˈroʊniː/
Symbolism The Northern Crown
Right ascension 16 h
Declination +30°
Family Ursa Major
Quadrant NQ3
Area 179 sq. deg. (73rd)
Main stars 6
Stars with
known planets
Stars brighter than 3m 1
Stars within 10 pc (32.6 ly) 0
Brightest star α CrB (Alphecca or Gemma) (2.21m)
Nearest star HD 144579
(46.86 ly, 14.37 pc)
Messier objects 0
Meteor showers None
Serpens Caput
Visible at latitudes between +90° and −50°.
Best visible at 21:00 (9 p.m.) during the month of July.

Corona Borealis is a small constellation in the northern sky. Its name is Latin for "northern crown", a name inspired by its shape; its main stars form a semicircular arc. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy and remains one of the 88 modern constellations.


Notable features



Corona Borealis has no first magnitude stars. Its brightest star, α CrB (Alphecca, also known as Gemma) is of magnitude 2.2 (slightly variable) and is considered a member of the diffuse Ursa Major Moving Group. The constellation contains several interesting variable stars: two of the best known are R Coronae Borealis and T Coronae Borealis.

Named Stars

Bayer Name Origin Meaning
α Alphecca/Alpheta Arabic "The broken" ring of stars
β Nusakan Arabic The two series
T Blaze Star English The star that blazes now and then

Deep sky objects

Corona Borealis contains no bright deep sky objects. Abell 2065 is a highly concentrated galaxy cluster containing over 400 members, the brightest of which are of 16th magnitude.


Corona Borealis was sometimes considered to represent a crown that was given by Dionysus to Ariadne, the daughter of Minos of Crete. At other points it was considered to belong, in a sense, to Boötes, the herdsman. The Cheyenne nation of Native Americans called it the "Camp Circle" as they arranged their camps in a semicircle. In Welsh mythology, the Northern Crown was called Caer Arianrhod, ‘the Castle of the Silver Circle,’ and was the heavenly abode of the Lady Arianrhod (Squire, 2000:154-155).

See also


  • Ian Ridpath and Wil Tirion (2007). Stars and Planets Guide, Collins, London. ISBN 978-0007251209. Princeton University Press, Princeton. ISBN 978-0691135564.
  • Squire, C. (2000). The mythology of the British Islands: an introduction to Celtic myth, legend, poetry and romance. London & Ware: UCL & Wordsworth Editions Ltd.

External links

Coordinates: Sky map 16h 00m 00s, +30° 00′ 00″


Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary



Map of Corona Borealis


From Latin corona borealis (northern crown)

Proper noun

Corona Borealis


Corona Borealis

  1. (astronomy) A small constellation said to resemble a crown.

Derived terms

  • Coronae Borealis


External links

See also


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