Universe Guide

WOH G64 (Supergiant Star) Star Facts

WOH G64 Facts

Information on WOH G64

WOH G64 is one of the largest stars that we have so far discovered. If the star was located in our Solar System, it would extend out as far as Jupiter, even Saturn. The star is in evolved status meaning it is past the main sequence and no longer fusing hydrogen into helium hence why it has grown so large. The Star will explode in a supernova in the next 10,000 years.

Location of WOH G64

The location of the supergiant 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 WOH G64, the location is 04h 55m 10 and -68 20` 29.81 .

Proper Motion of WOH G64

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 -1.35 milliarcseconds/year towards the north and 1.11 milliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour, Radius) of WOH G64

WOH G64 Colour and Temperature

WOH G64 has a spectral type of M5I. This means the star is a red supergiant star.

WOH G64 Radius

WOH G64 has been calculated as 1,540.00 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,071,532,000.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.

WOH G64 Apparent and Absolute Magnitudes

WOH G64 has an apparent magnitude of 18.46 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 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 WOH G64

The Parallax of the star is given as -0.23 which gives a calculated distance to WOH G64 of -14305.41 light years from the Earth or -4385.96 parsecs. It is about -9,593,445,830,663 miles from Earth.

The star is roughly -904,662,885.83 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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Additional WOH G64 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameWOH G64
Spectral TypeM5I
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star
GalaxyLarge Magellanic Cloud
Visual / Apparent Magnitude18.46
Naked Eye VisibleRequires 8m Telescope - Magnitudes
Right Ascension (R.A.)04h 55m 10
Declination (Dec.)-68 20` 29.81
Distance from Earth-0.23 Parallax (milliarcseconds)
 -14305.41 Light Years
 -4385.96 Parsecs
 -904,662,885.83 Astronomical Units
Proper Motion Dec.-1.35 milliarcseconds/year
Proper Motion RA.1.11 milliarcseconds/year

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)1,540.00 (1,540.00 - 2,575.00)

Sources and Links


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Comments and Questions

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