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276 G. Cet, HD16399, HIP12272

276 G. Cet is a blue to white star that can be located in the constellation of Cetus. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. The star has an estimated age of 1.60 Billion of Years but could be as young as 1.50 to 1.70 according to Hipparcos.

HIP12272 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD16399. The Id of the star in the Gould Star Catalogue is 276. 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 276 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 276 G. Cet, the location is 02h 38m 00.70 and +07d 41` 43.4 .

Proper Motion of 276 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 -39.50 ± 0.70 miliarcseconds/year towards the north and 87.92 ± 0.88 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is 26.01000 km/s with an error of about 0.07 km/s .

Physical Properties (Colour, Temperature, Age, Radius) of 276 G. Cet

276 G. Cet has a spectral type of F6IV. This means the star is a blue to white star. The star is 7448.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24292.6458611200000000s. The star has a B-V Colour Index of 0.43 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,590 Kelvin.

276 G. Cet Radius has been calculated as being 3.10 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,155,753.67.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 2.77. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.01 with an error value of 0.03 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 1.60 Billion years old but could be between 1.50 and 1.70 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

276 G. Cet Apparent and Absolute Magnitudes

276 G. Cet has an apparent magnitude of 6.40 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 1.82 If you used the 2007 Parallax value, you would get an absolute magnitude of 2.06. 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 276 G. Cet

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 12.11 which gave the calculated distance to 276 G. Cet as 269.33 light years away from Earth or 82.58 parsecs. It would take a spaceship travelling at the speed of light, 269.33 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 13.55 which put 276 G. Cet at a distance of 240.71 light years or 73.80 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.

The star's Galacto-Centric Distance is 7,448.00 Parsecs or 24,292.65 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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.

276 G. Cet Facts

Alternative Names

Traditional/Proper Name276 G. Cet
Hipparcos Library I.D.12272
Bonner DurchmusterungBD+07 405
Gould I.D.276
Henry Draper Designation16399

Visual Facts

Star Type star
Age1.60 Billion Years Old
Age Range1.50 - 1.70 Billion Years Old
Absolute Magnitude1.82 / 2.06
Visual / Apparent Magnitude6.40
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)02h 38m 00.70
Declination (Dec.)+07d 41` 43.4
Galactic Latitude-46.66 degrees
Galactic Longitude163.28 degrees
1997 Distance from Earth12.11 Parallax (milliarcseconds)
 269.33 Light Years
 82.58 Parsecs
2007 Revised Distance from Earth13.55 Parallax (milliarcseconds)
 240.71 Light Years
 73.80 Parsecs
Galacto-Centric Distance24,292.65 Light Years / 7,448.00 Parsecs
Proper Motion Dec.-39.50 ± 0.70 milliarcseconds/year
Proper Motion RA.87.92 ± 0.88 milliarcseconds/year
B-V Index0.43
Radial Velocity26.01 ± 0.07 km/s
Iron Abundance-0.01 ± 0.03 Fe/H
Spectral TypeF6IV
Colour(F) blue to white

Estimated Facts

Calculated Effective Temperature6,590 Kelvin

Sources and Links

SIMBAD SourceLink

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