Universe Guide

Corona Borealis, The Northern Crown Constellation

Corona Borealis Constellation Star Map

Corona Borealis (Pronounciation:Core-ona Bore-e-a-liss, Abbrev:CrB, Latin:Coronae Borealis) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Corona Borealis takes up 178.71 sq. degrees of the night sky which equates to 0.43% of the night sky. Corona Borealis is the 73rd largest in terms of size in the night sky.

The constellation name means The Northern Crown . The constellation is one of the original constellations that was devised by the Ancient Greco-Egyptian astronomer Ptolemy who lived between 90 A.D. and 168 A.D.

There are 7 stars that make up the main constellation. The hipparcos satellite scanned and detailed 451 stars. There are 25 stars that can be seen with the naked eye in the constellation on a very clear night sky.

Corona Borealis is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Corona Borealis is a northern hemispheric constellation which means it can't be seen easily or at all from the southern hemisphere.

There are 6 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. There is a dedicated page for exoplanets in Corona Borealis. The current largest star so far identified in the constellation of Corona Borealis is S Coronae Borealis.

There are no deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.

The image at the top right of this page was generated using Night Vision, a free to use and download application by Brian Simspon.

Distance to Corona Borealis

You can't just go to one location and arrive at the constellation because the constellation is made up of stars at different locations and different distances. The nearest main star in the constellation is at a distance of 75.05 light years and the furthest main star is a distance of 375.33 light years. The average distance to the main stars is 201.65 light years.

Corona Borealis Star Facts

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

HIP 78775, Corona Borealis's Nearest Star

The nearest star to Earth is HIP 78775 which is roughly about 47.36 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 145457 which is about 408.73 Light Years.

HIP 77697, Corona Borealis's Furthest Star

The furthest star that is located in the constellation is HIP 77697 and it is 108721.1 light years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

Alphecca, Brightest Star in Corona Borealis

The brightest star in Corona Borealis is Alphecca and is located about 141.75 light years from the Sun. The star has a apparent magnitude of 2.22 but an absolute magnitude of 0.41 when the star is viewed from a distance of 10 Parsecs or 32.6 Light Years. The star is recognised as being the brightest in the constellation as it has the Bayer status of Alpha.

R Coronae Borealis, Corona Borealis's Dimmest Visible Star

The dimmest star that can be seen in Corona Borealis with the naked eye is R Coronae Borealis. The dim star has an apparent magnitude of 5.89. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan.

Corona Borealis Mythology

The Corona Borealis is believed to be the crown given to Dionysus to Ariadne, the daughter of Minos of Crete. There is another constellation located in the southern hemisphere called Corona Borealis which has a different mythology.

Corona Borealis Facts

NameCorona Borealis
Is a Zodiac Sign No
Brightest StarAlphecca
Area178.71 sq. deg.
Percentage of Night Sky0.43%
Size Position73rd
Hemisphere Northern
Site Exoplanet Count6
Meteor Shower Count5
Nearest StarHIP 78775
Nearest Star with Exoplanet(s)HD 145457
Largest StarS Coronae Borealis
Brightest StarAlphecca
Dimmest StarR Coronae Borealis
Furthest StarHIP 77697
Bright Star Count25
Hipparcos Star Count451
Main Star Count7
Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsBootes

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

List of Deep Space Objects (Galaxies, Nebulas, Supernovas, etc) in Corona Borealis

NameTypeDistanceDeclinationRight Ascension
NGC 6120Galaxy+37:46:27.683323532 16h 19h 48m 1164627156

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