Universe Guide

133 G. Cen - HD110287 - HIP61916

133 G. Cen is an orange to red luminous giant star that can be located in the constellation of Centaurus. HIP61916 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD110287. The Id of the star in the Gould Star Catalogue is 133. 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 133 G. Cen

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 from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 133 G. Cen, the location is 12h 41m 23.04 and -46 d 08`44.6 .

Proper Motion of 133 G. Cen

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 059.00 ± 000.00 towards the north and -071.00 ± 000.00 east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 133 G. Cen

133 G. Cen has a spectral type of K3II. This means the star is an orange to red coloured luminous giant star. The star has a B-V Colour Index of 1.47 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,076 Kelvin.

133 G. Cen has been calculated as 31.80 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 22,127,419.51.km.

133 G. Cen Apparent and Absolute Magnitudes

133 G. Cen has an apparent magnitude of 5.84 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 -1.15 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.15. 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 133 G. Cen

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 4.00 which gave the calculated distance to 133 G. Cen as 815.41 light years away from us or 250 parsecs. In 2007, Hipparcos data was revised with a new parallax of 4.00 which put 133 G. Cen at a distance of 815.41 light years or 250 parsecs.

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.

133 G. Cen Facts


Traditional Name133 G. Cen
Hipparcos Library I.D.61916
Gould I.D.133
Henry Draper Designation110287
Celestial TypeStar
Absolute Magnitude-1.15 / -1.15
Apparent Magnitude5.84
Right Ascension (R.A.)12h 41m 23.04
Declination (Dec.)-46 d 08`44.6
1997 Distance4.00 Parallax (milliarcseconds)
 815.41 Light Years
 250 Parsecs
2007 Distance4.00 Parallax (milliarcseconds)
 815.41 Light Years
 250 Parsecs
Proper Motion Dec.59.00 ± 0.00 milliarcseconds/year
Proper Motion RA.-71.00 ± 0.00 milliarcseconds/year
B-V Index1.47
Spectral TypeK3II
Colour(K) Orange to Red
Star Typeluminous giant star
Radius (x the Sun)31.80
Calculated Effective Temperature4,076 Kelvin


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