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CI Ceti

CI Ceti Facts

CI Ceti's Alternative Names

HIP1378 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD1302.

CI Ceti has alternative name(s) :- CI Cet, CI Cet.

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-14 38.

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

Location of CI Ceti

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 CI Ceti, the location is 00h 17m 13.16 and -14° 06` 32.9 .

Physical Properties (Colour, Temperature) of CI Ceti

CI Ceti has a spectral type of B8/B9V. This means the star is a blue main sequence star. The star has a B-V Colour Index of -0.08 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 11,099 Kelvin.

CI Ceti Radius has been calculated as being 7.18 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 4,998,531.27.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.

CI Ceti Apparent and Absolute Magnitudes

CI Ceti has an apparent magnitude of 9.51 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 -2.27 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 CI Ceti

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.44 which gave the calculated distance to CI Ceti as 7412.80 light years away from Earth or 2272.73 parsecs. It would take a spaceship travelling at the speed of light, 7412.80 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of CI Ceti

The star is a rotating Alpha2 Canum Venatic 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. CI Ceti brightness ranges from a magnitude of 9.517 to a magnitude of 9.457 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.9 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 CI Ceti Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCI Ceti
Alternative NamesCI Cet, HD 1302, HIP 1378, BD-14 38, CI Cet
Spectral TypeB8/B9V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type main sequence Dwarf Star
ColourBlue
GalaxyMilky Way
ConstellationCetus
Absolute Magnitude -2.27
Visual / Apparent Magnitude9.51
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)00h 17m 13.16
Declination (Dec.)-14° 06` 32.9
Galactic Latitude-74.73 degrees
Galactic Longitude89.72 degrees
Distance from Earth0.44 Parallax (milliarcseconds)
 7412.80 Light Years
 2272.73 Parsecs
 468,780,946.59 Astronomical Units
B-V Index-0.08

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassRotating
Variable Star TypeAlpha2 Canum Venatic
Mean Variability Period in Days0.947
Variable Magnitude Range (Brighter - Dimmer)9.457 - 9.517

Estimated Calculated Facts


Radius (x the Sun)7.18
Effective Temperature11,099 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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