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HIP 76479, HD139121

Primary Facts on HIP 76479

HIP 76479's Alternative Names

HIP76479 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD139121.

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

Location of HIP 76479

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 HIP 76479, the location is 15h 37m 11.91 and -23° 39` 05.6 .

Physical Properties (Colour, Temperature) of HIP 76479

HIP 76479 has a spectral type of G2V. This means the star is a white to yellow main sequence star. The star has a B-V Colour Index of 0.89 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,074 Kelvin.

HIP 76479 Radius has been calculated as being 35.99 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 25,044,373.50.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.

HIP 76479 Apparent and Absolute Magnitudes

HIP 76479 has an apparent magnitude of 8.89 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 -2.37 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 76479

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.56 which gave the calculated distance to HIP 76479 as 5824.35 light years away from Earth or 1785.71 parsecs. It would take a spaceship travelling at the speed of light, 5824.35 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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 HIP 76479 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHIP 76479
Alternative NamesHD 139121, HIP 76479
Spectral TypeG2V
Constellation's Main StarNo
Multiple Star SystemYes
Star Type main sequence Dwarf Star
Colour white to yellow
GalaxyMilky Way
ConstellationLibra
Absolute Magnitude -2.37
Visual / Apparent Magnitude8.89
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)15h 37m 11.91
Declination (Dec.)-23° 39` 05.6
Galactic Latitude25.35 degrees
Galactic Longitude345.07 degrees
Distance from Earth0.56 Parallax (milliarcseconds)
 5824.35 Light Years
 1785.71 Parsecs
 368,326,560.63 Astronomical Units
B-V Index0.89

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)35.99
Effective Temperature5,074 Kelvin

Sources and Links


SIMBAD SourceLink

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
139121-2312418.2A8.70000-19.000002.00000G5Yellow
B9.300001897

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