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252 G. Cet - HD15328 - HIP11474

252 G. Cet is a orange to red giant star that can be located in the constellation of Cetus. HIP11474 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD15328. The Id of the star in the Gould Star Catalogue is 252. Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major.

Location of 252 G. Cet

The location of the star in the galaxy 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 252 G. Cet, the location is 02h 27m 59.93 and +01d57`39.2 .

Proper Motion of 252 G. Cet

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -016.99 ± 001.69 towards the north and -003.21 ± 001.44 east if we saw them in the horizon.

252 G. Cet Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 96.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.

Physical Properties (Colour, Temperature, Radius) of 252 G. Cet

252 G. Cet has a spectral type of K0III. This means the star is a orange to red giant star. The star has a B-V Colour Index of 0.97 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,907 Kelvin.

252 G. Cet has been calculated as 19.29 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 13,420,362.77.km.

252 G. Cet Apparent and Absolute Magnitudes

252 G. Cet has an apparent magnitude of 6.45 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of -0.87 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.34. 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 252 G. Cet

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 3.43 which gave the calculated distance to 252 G. Cet as 950.91 light years away from Earth or 291.55 parsecs. It would take a spaceship travelling at the speed of light, 950.91 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 6.00 which put 252 G. Cet at a distance of 543.61 light years or 166.67 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

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 Stellar Age, Metallicity or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

252 G. Cet Facts

Alternative Names

Traditional Name252 G. Cet
Hipparcos Library I.D.11474
Bonner DurchmusterungBD+01 431
Gould I.D.252
Henry Draper Designation15328

Visual Facts

Star Typegiant star
Absolute Magnitude-0.87 / 0.34
Apparent Magnitude6.45
Right Ascension (R.A.)02h 27m 59.93
Declination (Dec.)+01d57`39.2
1997 Distance from Earth3.43 Parallax (milliarcseconds)
 950.91 Light Years
 291.55 Parsecs
2007 Revised Distance from Earth6.00 Parallax (milliarcseconds)
 543.61 Light Years
 166.67 Parsecs
Proper Motion Dec.-16.99 ± 1.69 milliarcseconds/year
Proper Motion RA.-3.21 ± 1.44 milliarcseconds/year
B-V Index0.97
Spectral TypeK0III
Colour(K) Orange to Red

Estimated Facts

Radius (x the Sun)19.29
Luminosity (x the Sun)96.0000000
Calculated Effective Temperature4,907 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.


Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
15328+01 431.0A7.10000-16.00000-5.00000K0Orange
B7.500001960

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