Universe Guide
HomeAliensConstellationsTelevision and Films ListFact ListGames ListWarcraftSearchTwitterFacebook

Kappa Coronae Borealis, 11 Coronae Borealis, HD142091, HIP77655, HR5901

Kappa Coronae Borealis is a orange to red subgiant star that can be located in the constellation of Corona Borealis. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. It is calculated at being 2.500 Billion Years old. This information comes from ExoPlanet. Kappa Coronae Borealis has at least 1 Extrasolar Planets believed to be in orbit around the star.

Kappa Coronae Borealis's Alternative Names

Kappa Coronae Borealis (Kap Crb) is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR5901. HIP77655 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD142091.

Kappa Coronae Borealis has alternative name(s) :- , Kappa Crb.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John numbered the stars in the constellation with a number and the latin name, this star's Flamsteed designation is 11 Coronae Borealis with it shortened to 11 CrB.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+36 2652.

More details on star alternative names can be found at Star Names .

Location of Kappa Coronae Borealis

The location of the star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For Kappa Coronae Borealis, the location is 15h 51m 13.94 and +35° 39` 29.6 .

Proper Motion of Kappa Coronae Borealis

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -348.44 ± 0.18 miliarcseconds/year towards the north and -8.55 ± 0.21 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is -25.16000 km/s with an error of about 0.13 km/s .

Kappa Coronae Borealis Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 13.59 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature, Metallicity, Age, Mass) of Kappa Coronae Borealis

Kappa Coronae Borealis has a spectral type of K0III-IV. This means the star is a orange to red subgiant star. The star is 7,390.00 Parsecs from the Galactic Centre or terms of Light Years is 24,103.47 s. The star has a B-V Colour Index of 0.99 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,868 Kelvin.

Kappa Coronae Borealis Radius has been calculated as being 4.51 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,138,079.30.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 4.41. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's solar mass is 1.51 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

The star's metallicity is 0.140000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

The star is believed to be about 2.50 Billion years old. To put in context, the Sun is believed to be about five billion years old and the Universe is about 13.8 billion years old.

Kappa Coronae Borealis Apparent and Absolute Magnitudes

Kappa Coronae Borealis has an apparent magnitude of 4.79 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 2.32 If you used the 2007 Parallax value, you would get an absolute magnitude of 2.37. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to Kappa Coronae Borealis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 32.13 which gave the calculated distance to Kappa Coronae Borealis as 101.51 light years away from Earth or 31.12 parsecs. It would take a spaceship travelling at the speed of light, 101.51 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 32.79 which put Kappa Coronae Borealis at a distance of 99.47 light years or 30.50 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,390.00 Parsecs or 24,103.47 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

Hide Explanations
Show GridLines

Kappa Coronae Borealis Facts

Visual Facts

Primary / Proper / Traditional NameKappa Coronae Borealis
Alternative NamesKap Crb, HD 142091, HIP 77655, HR 5901, 11 Coronae Borealis, 11 CrB, BD+36 2652, Kappa Crb
Spectral TypeK0III-IV
Multiple Star SystemYes
Star TypeSubgiant Star
Colour orange to red
GalaxyMilky Way
ConstellationCorona Borealis
Age2.50 Billion Years Old
Absolute Magnitude2.32 / 2.37
Visual / Apparent Magnitude4.79
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)15h 51m 13.94
Declination (Dec.)+35° 39` 29.6
Galactic Latitude51.04 degrees
Galactic Longitude57.02 degrees
1997 Distance from Earth32.13 Parallax (milliarcseconds)
 101.51 Light Years
 31.12 Parsecs
2007 Distance from Earth32.79 Parallax (milliarcseconds)
 99.47 Light Years
 30.50 Parsecs
Galacto-Centric Distance24,103.47 Light Years / 7,390.00 Parsecs
Proper Motion Dec.-348.44 ± 0.18 milliarcseconds/year
Proper Motion RA.-8.55 ± 0.21 milliarcseconds/year
B-V Index0.99
Radial Velocity-25.16 ± 0.13 km/s
Iron Abundance0.08 ± 0.02 Fe/H
Semi-Major Axis5943.00
Stellar Luminosity (Lsun)13.59

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Facts

Calculated Effective Temperature4,868 Kelvin
Mass Compared to the Sun1.51

Sources and Links

SIMBAD SourceLink

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.

Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
142091+36 2652.0A4.80000-12.00000-351.00000K0Orange

List of Extrasolar Planets orbiting Kappa Coronae Borealis

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
kappa CrB bConfirmed1251.0000.1920072.634.0002007.000

Related Stars

Add a Comment

Email: (Optional)