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HIP 2538, HD2903

HIP 2538 is a blue to white main sequence dwarf star that can be located in the constellation of Sculptor. The description is based on the spectral class. The star can not be seen by the naked eye, you need a telescope to see it.

HIP 2538's Alternative Names

HIP2538 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD2903.

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

Location of HIP 2538

The location of the 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 star is compared to the celestial equator and is expressed in degrees. For HIP 2538, the location is 00h 32m 14.02 and -26° 47` 45.9 .

Proper Motion of HIP 2538

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 -30.91 ± 0.91 miliarcseconds/year towards the north and 13.36 ± 1.45 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature) of HIP 2538

HIP 2538 has a spectral type of F6V. This means the star is a blue to white main sequence dwarf star. The star has a B-V Colour Index of 0.4 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,728 Kelvin.

HIP 2538 Radius has been calculated as being 1.24 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 862,143.07.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 1.07. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 2538 Apparent and Absolute Magnitudes

HIP 2538 has an apparent magnitude of 9.74 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 3.72 If you used the 2007 Parallax value, you would get an absolute magnitude of 4.04. 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 HIP 2538

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.25 which gave the calculated distance to HIP 2538 as 521.86 light years away from Earth or 160 parsecs. It would take a spaceship travelling at the speed of light, 521.86 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 7.23 which put HIP 2538 at a distance of 451.12 light years or 138.31 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 Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

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HIP 2538 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 2538
Alternative NamesHD 2903, HIP 2538
Spectral TypeF6V
Multiple Star SystemNo / Unknown
Star Type main sequence Dwarf Star
Colour blue to white
GalaxyMilky Way
ConstellationSculptor
Absolute Magnitude3.72 / 4.04
Visual / Apparent Magnitude9.74
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)00h 32m 14.02
Declination (Dec.)-26° 47` 45.9
Galactic Latitude-85.71 degrees
Galactic Longitude36.28 degrees
1997 Distance from Earth6.25 Parallax (milliarcseconds)
 521.86 Light Years
 160 Parsecs
2007 Distance from Earth7.23 Parallax (milliarcseconds)
 451.12 Light Years
 138.31 Parsecs
Proper Motion Dec.-30.91 ± 0.91 milliarcseconds/year
Proper Motion RA.13.36 ± 1.45 milliarcseconds/year
B-V Index0.40

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature6,728 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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