CQ Cephei is a eclipsing wolf-rayet star that can be located in the constellation of Cepheus. The description is based on the spectral class. CQ Cephei is not part of the constellation but is within the borders of the constellation.
The star can not be seen by the naked eye, you need a telescope to see it.
HIP111633 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD214419.
CQ Cephei has alternative name(s) :- , CQ Cep.
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+56 2818.
More details on star alternative names can be found at Star Names .
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 CQ Cephei, the location is 22h 36m 53.96 and +56° 54` 21.0 .
The star is a Wolf-Rayet, a rare type of star of which not many are known. These stars are extremely luminous and large compared to our Sun. They live fast and die hard in a matter of millions not billions of years like our Sun. They exhaust their hydrogen supplies, turning to other gasses and expand outwards with massive solar winds, moving a step closer in the stellar evolution towards their death in a super or hypernova explosion.
CQ Cephei has a spectral type of WN7 (SB1). The star has a B-V Colour Index of 0.37 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,501 Kelvin.
CQ Cephei Radius has been calculated as being 88.92 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 61,870,070.51.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.
CQ Cephei has an apparent magnitude of 8.86 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 -5.41 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.14 which gave the calculated distance to CQ Cephei as 23297.38 light years away from Earth or 7142.86 parsecs. It would take a spaceship travelling at the speed of light, 23297.38 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star is a eclipsing Beta Lyrae (Sheliak) 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. CQ Cephei brightness ranges from a magnitude of 9.161 to a magnitude of 8.725 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 1.6 days (variability).
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.
|Primary / Proper / Traditional Name||CQ Cephei|
|Alternative Names||HD 214419, HIP 111633, BD+56 2818, CQ Cep, WR 155|
|Spectral Type||WN7 (SB1)|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Wolf-Rayet star|
|Visual / Apparent Magnitude||8.86|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||22h 36m 53.96|
|Declination (Dec.)||+56° 54` 21.0|
|Galactic Latitude||-1.29 degrees|
|Galactic Longitude||105.32 degrees|
|Distance from Earth||0.14 Parallax (milliarcseconds)|
|23297.38 Light Years|
|1,473,310,367.78 Astronomical Units|
|Radial Velocity||-53.40 ± 7.40 km/s|
|Variable Star Class||Eclipsing|
|Variable Star Type||Beta Lyrae (Sheliak)|
|Mean Variability Period in Days||1.641|
|Variable Magnitude Range (Brighter - Dimmer)||8.725 - 9.161|
|Calculated Effective Temperature||6,501 Kelvin|