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W Virginis, HD116802, HIP65531

W Virginis is a white to yellow pulsating supergiant star that can be located in the constellation of Virgo. The description is based on the spectral class. W Virginis 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 Virginis's Alternative Names

HIP65531 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD116802.

W Virginis has alternative name(s) :- , W Vir.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD-02 3683.

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

Location of W Virginis

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 Virginis, the location is 13h 26m 02.00 and -03° 22` 43.4 .

Physical Properties (Colour, Temperature) of W Virginis

W Virginis has a spectral type of G6Ibvar. This means the star is a white to yellow supergiant 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 6,398 Kelvin. The star's Iron Abundance is -0.59 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

W Virginis Apparent and Absolute Magnitudes

W Virginis has an apparent magnitude of 9.49 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 W Virginis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -4.44 which gave the calculated distance to W Virginis as -734.60 light years away from Earth or -225.23 parsecs. It would take a spaceship travelling at the speed of light, -734.60 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of W Virginis

The star is a pulsating W Virginis Stars, A 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 Virginis brightness ranges from a magnitude of 10.747 to a magnitude of 9.652 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 17.3 days (variability).

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 Virginis Facts

Visual Facts

Primary / Proper / Traditional NameW Virginis
Alternative NamesHD 116802, HIP 65531, BD-02 3683, W Vir
Spectral TypeG6Ibvar
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star
Colour white to yellow
GalaxyMilky Way
Visual / Apparent Magnitude9.49
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 26m 02.00
Declination (Dec.)-03° 22` 43.4
Galactic Latitude58.37 degrees
Galactic Longitude319.57 degrees
Distance from Earth-4.44 Parallax (milliarcseconds)
 -734.60 Light Years
 -225.23 Parsecs
 -46,456,698.60 Astronomical Units
B-V Index0.40
Radial Velocity-65.50 ± 3.20 km/s
Iron Abundance-0.59 ± 9.99 Fe/H

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeW Virginis Stars, A
Mean Variability Period in Days17.267
Variable Magnitude Range (Brighter - Dimmer)9.652 - 10.747

Estimated Facts

Calculated Effective Temperature6,398 Kelvin

Sources and Links

SIMBAD SourceLink

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