HIP115390 is the reference name for the star in the Hipparcos Star Catalogue.
CH Cassiopeiae has alternative name(s) :- CH Cas, CH Cas.
More details on objects' alternative names can be found at Star Names .
The location of the supergiant 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 CH Cassiopeiae, the location is 23h 22m 28.44 and +62° 45` 25.8 .
Based on the star's spectral type of F3Ibp-F6 , CH Cassiopeiae's colour and type is yellow to white supergiant star. The star has a B-V Colour Index of 1.75 which means the star's temperature is about 3,255 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.
CH Cassiopeiae estimated radius has been calculated as being 88.27 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 61,419,928.75.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 rather than peer reviewed papers. It has been known to produce widely incorrect figures.
CH Cassiopeiae has an apparent magnitude of 11.00 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 -2.39 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 0.21 which gave the calculated distance to CH Cassiopeiae as 15531.59 light years away from Earth or 4761.90 parsecs. If you want that in miles, it is about 91,304,399,059,884,825.24, based on 1 Ly = 5,878,625,373,183.61 miles.
The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).
The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.
|Description||Speed (m.p.h.)||Time (years)|
|Speed of Sound (Mach 1)||767.269||13,575,085,828.84|
|Concorde (Mach 2)||1,534.54||6,787,534,068.07|
|New Horizons Probe||33,000||315,628,561.48|
|Speed of Light||670,616,629.00||15,531.59|
The star is a pulsating Delta Cepheid 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. CH Cassiopeiae brightness ranges from a magnitude of 11.560 to a magnitude of 10.478 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 15.1 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||CH Cassiopeiae|
|Alternative Names||CH Cas, HIP 115390, CH Cas|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||very luminous Supergiant Star less luminour Supergiant Star|
|Colour||Yellow - White|
|Visual / Apparent Magnitude||11.00|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Magnitudes|
|Right Ascension (R.A.)||23h 22m 28.44|
|Declination (Dec.)||+62° 45` 25.8|
|Galactic Latitude||1.62 degrees|
|Galactic Longitude||112.95 degrees|
|Distance from Earth||0.21 Parallax (milliarcseconds)|
|15531.59 Light Years|
|982,205,536.76 Astronomical Units|
|Variable Star Class||Pulsating|
|Variable Star Type||Delta Cepheid|
|Mean Variability Period in Days||15.089|
|Variable Magnitude Range (Brighter - Dimmer)||10.478 - 11.560|
|Radius (x the Sun)||88.27|
|Effective Temperature||3,255 Kelvin|
There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.
You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.