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W Volantis, HIP37120

W Volantis is a eclipsing/rotating star that can be located in the constellation of Volans. The description is based on the spectral class. W Volantis is not part of the constellation but is within the borders of the constellation.

The star can not be seen by the naked eye, you need a telescope to see it.

W Volantis's Alternative Names

HIP37120 is the reference name for the star in the Hipparcos Star Catalogue.

W Volantis has alternative name(s) :- , W Vol.

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

Location of W Volantis

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 W Volantis, the location is 07h 37m 40.07 and -69° 32` 32.5 .

Proper Motion of W Volantis

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 11.24 ± 1.51 miliarcseconds/year towards the north and -11.44 ± 1.56 miliarcseconds/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 (Temperature) of W Volantis

W Volantis has a spectral type of k-m. The star has a B-V Colour Index of 0.34 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,614 Kelvin.

W Volantis Radius has been calculated as being 2.41 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,676,626.70.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 2.24. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

W Volantis Apparent and Absolute Magnitudes

W Volantis has an apparent magnitude of 10.66 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 2.35 If you used the 2007 Parallax value, you would get an absolute magnitude of 2.51. 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 W Volantis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.18 which gave the calculated distance to W Volantis as 1496.16 light years away from Earth or 458.72 parsecs. It would take a spaceship travelling at the speed of light, 1496.16 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 2.34 which put W Volantis at a distance of 1393.86 light years or 427.35 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.

Using the 2007 distance, the star is roughly 88,146,650.74 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.

Variable Type of W Volantis

The star is a eclipsing/rotating Beta Persei (Algol)/ variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. W Volantis brightness ranges from a magnitude of 11.500 to a magnitude of 10.600 over its variable period. The smaller the magnitude, the brighter the star.

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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W Volantis Facts

Visual Facts

Primary / Proper / Traditional NameW Volantis
Alternative NamesHIP 37120, W Vol
Spectral Typek-m
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
Absolute Magnitude 2.35 / 2.51
Visual / Apparent Magnitude10.66
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)07h 37m 40.07
Declination (Dec.)-69° 32` 32.5
Galactic Latitude-21.40 degrees
Galactic Longitude281.35 degrees
1997 Distance from Earth2.18 Parallax (milliarcseconds)
 1496.16 Light Years
 458.72 Parsecs
2007 Distance from Earth2.34 Parallax (milliarcseconds)
 1393.86 Light Years
 427.35 Parsecs
 88,146,650.74 Astronomical Units
Proper Motion Dec.11.24 ± 1.51 milliarcseconds/year
Proper Motion RA.-11.44 ± 1.56 milliarcseconds/year
B-V Index0.34

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEclipsing/Rotating
Variable Star TypeBeta Persei (Algol)/
Variable Magnitude Range (Brighter - Dimmer)10.600 - 11.500

Estimated Facts

Calculated Effective Temperature6,614 Kelvin

Sources and Links

SIMBAD SourceLink

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