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. The constellation gets its name as it 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.
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 brightest star in Corona Borealis is Alphecca. There are 1 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. The current largest star so far identified in the constellation of Corona Borealis is S Coronae Borealis.
The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Corona Borealis is 451. The number of stars that are of magnitude 6.0 or lower in the constellation is 25. The number of stars in the constellation that make up the outline is 7.
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 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 can be located in the constellation is HIP 77697 which is located about 108721 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 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 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.
Believed to be the crown given to Dionysus to Ariadne, the daughter of Minos of Crete.There are no major meteor showers that radiate from within this constellation.
|Is a Zodiac Sign||No|
|Largest Star||S Coronae Borealis|
|Area||178.71 sq. deg.|
|Percentage of Night Sky||0.43%|
|Site Exoplanet Count||1|
|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.
|Star||Distance (Lt. Yrs.)||Exoplanet Count||Declination||Right Ascension|
|HD 145457||408.73||1||+26d 44` 33.6||16h 10m 03.93|
As there's so many stars in the cosmos, not all the stars are listed here. The site has lots of stars not listed so if your star isn't listed and you know the Henry Draper or Hipparcos ID, type https://www.universeguide.com/star/ then followed by the HIPNNNNNN or HDNNNN where NNNNN is the number part of the name. The stars that I do list have either a traditional name, a bayer or other classification name.
|Star||Distance (Lt. Yrs.)||Declination||Right Ascension|
|23 Herculis||585.57||+32d 19` 58.9||16h 22m 56.48|
|ADS 9731||359.61||+36d 14` 48.3||15h 38m 12.96|
|Alphecca||75.05||+26d 42` 53.7||15h 34m 41.19|
|Delta Coronae Borealis||170.05||+26d 04` 06.8||15h 49m 35.70|
|Epsilon Coronae Borealis||221.43||+26d 52` 40.9||15h 57m 35.30|
|Eta Coronae Borealis||58.26||+30d 17` 17.7||15h 23m 12.23|
|Gamma Coronae Borealis||146.07||+26d 17` 43.9||15h 42m 44.64|
|Iota Coronae Borealis||311.82||+29d 51` 03.9||16h 01m 26.59|
|Kappa Coronae Borealis||99.47||+35d 39` 29.6||15h 51m 13.94|
|Lambda Coronae Borealis||135.56||+37d 56` 48.3||15h 55m 47.57|
|Mu Coronae Borealis||618.91||+39d 00` 36.2||15h 35m 14.90|
|Nu1 Coronae Borealis||640.79||+33d 47` 56.9||16h 22m 21.42|
|Nu2 Coronae Borealis||594.10||+33d 42` 12.1||16h 22m 29.22|
|Nusakan||111.81||+29d 06` 19.8||15h 27m 49.85|
|Omicron Coronae Borealis||270.00||+29d 36` 58.7||15h 20m 08.64|
|Pi Coronae Borealis||243.41||+32d 30` 57.0||15h 43m 59.32|
|R Coronae Borealis||81540.84||+28d 09` 24.4||15h 48m 34.42|
|Rho Coronae Borealis||56.22||+33d 18` 19.4||16h 01m 02.80|
|RR Coronae Borealis||1113.19||+38d 33` 26.9||15h 41m 26.21|
|RS Coronae Borealis||1072.91||+36d 01` 19.7||15h 58m 30.80|
|RT Coronae Borealis||+29d 29` 14.0||15h 38m 03.03|
|RW Coronae Borealis||679.51||+29d 37` 19.7||15h 39m 15.24|
|S Coronae Borealis||1763.05||+31d 22` 02.7||15h 21m 23.96|
|Sigma Coronae Borealis||68.75||+33d 51` 31.8||16h 14m 41.04|
|T Coronae Borealis||3469.82||+25d 55` 12.5||15h 59m 30.17|
|Tau Coronae Borealis||116.70||+36d 29` 24.4||16h 08m 58.33|
|Theta Coronae Borealis||375.33||+31d 21` 33.0||15h 32m 55.80|
|U Coronae Borealis||811.35||+31d 38` 49.5||15h 18m 11.36|
|Upsilon Coronae Borealis||667.00||+29d 09` 01.1||16h 16m 44.77|
|V Coronae Borealis||8815.23||+39d 34` 18.0||15h 49m 31.31|
|Xi Coronae Borealis||183.44||+30d 53` 30.2||16h 22m 05.89|
|YY Coronae Borealis||301.17||+37d 50` 07.5||15h 50m 32.49|
|Zeta2 Coronae Borealis||473.39||+36d 38` 09.0||15h 39m 22.68|
|K||Light Orange Star 3,700 - 5,200k||172|
|F||Yellow-White 6,000 - 7,500k||96|
|G||Yellow 5,200 - 6,000k||82|
|A||White 7,500 - 10,000k||46|
|M||Red Dwarf Star <3,700k||40|
|B||Blue-White 10,500 - 30,000k||4|
|C||C-Type Carbon Star||1|
|R||R-Type Carbon Star||1|
|N||N-Type Carbon Star||1|