HIP57037 is the reference name for the star in the Hipparcos Star Catalogue.
CT Octantis has alternative name(s) :- , CT Oct.
More details on objects' alternative names can be found at Star Names .
The location of the main sequence 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 CT Octantis, the location is 11h 41m 44.83 and -88° 03` 43.8 .
CT Octantis has a spectral type of K5V. This means the star is a orange to red main sequence star. The star has a B-V Colour Index of 0.98 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,888 Kelvin.
CT Octantis has an apparent magnitude of 10.84 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 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. CT Octantis brightness ranges from a magnitude of 11.342 to a magnitude of 10.910 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.4 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||CT Octantis|
|Alternative Names||HIP 57037, CT Oct|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||main sequence Dwarf Star|
|Colour||Orange to Red|
|Visual / Apparent Magnitude||10.84|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Magnitudes|
|Right Ascension (R.A.)||11h 41m 44.83|
|Declination (Dec.)||-88° 03` 43.8|
|Mean Variability Period in Days||0.393|
|Variable Magnitude Range (Brighter - Dimmer)||10.910 - 11.342|
|Radius (x the Sun)||0.00|
|Effective Temperature||4,888 Kelvin|
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