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.
The distance to Corona Borealis is not calculable because all the stars that make up the constellation are at various distances. The best answer for distance to Corona Borealis is to calculate the average distance of the stars.
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. For a list of named stars, that is stars that don't start HD or HIP, please visit Corona Borealis Star List Page.
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 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.
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.
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.
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.
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
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.
|Is a Zodiac Sign||No|
|Largest Star||S Coronae Borealis|
|Area||178.71 sq. deg.|
|Percentage of Night Sky||0.43%|
|Site Exoplanet Count||6|
|Meteor Shower Count||5|
|Nearest Star||HIP 78775|
|Nearest Star with Exoplanet(s)||HD 145457|
|Dimmest Star||R Coronae Borealis|
|Furthest Star||HIP 77697|
|Bright Star Count||25|
|Hipparcos Star Count||451|
|Main Star Count||7|
|Messier Deep Space Object Count||0|
|*Non-Messier Deep Space Object Count||0|
|Bordering / Neighbouring / Surrounding Constellations||Bootes|
*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.
The map was generated using Night Vision, an awesome free application by Brian Simpson.