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AG Coronae Borealis

AG Coronae Borealis Facts

AG Coronae Borealis's Alternative Names

HIP79283 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD145626.

AG Coronae Borealis has alternative name(s) :- , AG 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+29 2784.

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

Location of AG Coronae Borealis

The location of the variable 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 object is compared to the celestial equator and is expressed in degrees. For AG Coronae Borealis, the location is 16h 10m 53.31 and +29° 08` 30.0 .

Physical Properties (Colour, Temperature) of AG Coronae Borealis

AG Coronae Borealis Colour and Temperature

AG Coronae Borealis has a spectral type of M.... This means the star is a red variable star. The star has a B-V Colour Index of 1.6 which means the star's temperature is about 3,775 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

AG Coronae Borealis Apparent and Absolute Magnitudes

AG Coronae Borealis has an apparent magnitude of 9.19 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 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 AG Coronae Borealis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.77 which gave the calculated distance to AG Coronae Borealis as -4235.89 light years away from Earth or -1298.70 parsecs. If you want that in miles, it is -2,840,658,272,615.

Variable Type of AG Coronae Borealis

The star is a pulsating Semi-Regular Star w variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. AG Coronae Borealis brightness ranges from a magnitude of 9.369 to a magnitude of 9.104 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 days (variability).

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.

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Additional AG Coronae Borealis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameAG Coronae Borealis
Alternative NamesHD 145626, HIP 79283, BD+29 2784, AG CrB
Spectral TypeM...
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
ConstellationCorona Borealis
Visual / Apparent Magnitude9.19
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)16h 10m 53.31
Declination (Dec.)+29° 08` 30.0
Galactic Latitude46.31 degrees
Galactic Longitude47.75 degrees
Distance from Earth-0.77 Parallax (milliarcseconds)
 -4235.89 Light Years
 -1298.70 Parsecs
 -267,874,237.30 Astronomical Units
B-V Index1.60

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star w
Mean Variability Period in Days0.231
Variable Magnitude Range (Brighter - Dimmer)9.104 - 9.369

Estimated Calculated Facts

Effective Temperature3,775 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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