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CV Octantis

CV Octantis Facts

CV Octantis's Alternative Names

HIP82459 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD145548.

CV Octantis has alternative name(s) :- , CV Oct.

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

Location of CV Octantis

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 CV Octantis, the location is 16h 51m 05.64 and -87° 08` 12.4 .

Physical Properties (Colour, Temperature) of CV Octantis

CV Octantis Colour and Temperature

CV Octantis has a spectral type of M3. This means the star is a red variable star. The star has a B-V Colour Index of 1.77 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,167 Kelvin.

CV Octantis Radius

Radius has been calculated as being 259.21 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 180,358,644.35.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.

CV Octantis Apparent and Absolute Magnitudes

CV Octantis has an apparent magnitude of 9.11 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 -4.61 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 CV Octantis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.18 which gave the calculated distance to CV Octantis as 18120.19 light years away from Earth or 5555.56 parsecs. It would take a spaceship travelling at the speed of light, 18120.19 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of CV Octantis

The star is a pulsating Slow Irregular 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. CV Octantis brightness ranges from a magnitude of 9.189 to a magnitude of 8.920 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 CV Octantis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCV Octantis
Alternative NamesHD 145548, HIP 82459, CV Oct
Spectral TypeM3
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourRed
GalaxyMilky Way
ConstellationOctans
Absolute Magnitude -4.61
Visual / Apparent Magnitude9.11
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)16h 51m 05.64
Declination (Dec.)-87° 08` 12.4
Galactic Latitude-25.67 degrees
Galactic Longitude305.68 degrees
Distance from Earth0.18 Parallax (milliarcseconds)
 18120.19 Light Years
 5555.56 Parsecs
 1,145,908,522.19 Astronomical Units
B-V Index1.77

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSlow Irregular
Mean Variability Period in Days0.210
Variable Magnitude Range (Brighter - Dimmer)8.920 - 9.189

Estimated Calculated Facts


Radius (x the Sun)259.21
Effective Temperature3,167 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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