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WW Fornacis, HIP8681

WW Fornacis is a orange to red pulsating variable star that can be located in the constellation of Fornax. 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.

WW Fornacis's Alternative Names

HIP8681 is the reference name for the star in the Hipparcos Star Catalogue.

WW Fornacis has alternative name(s) :- , WW For.

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

Location of WW Fornacis

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 WW Fornacis, the location is 01h 51m 41.89 and -36° 48` 17.7 .

Physical Properties (Colour, Temperature) of WW Fornacis

WW Fornacis has a spectral type of K5. This means the star is a orange to red variable star. The star has a B-V Colour Index of 1.67 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,562 Kelvin.

WW Fornacis Apparent and Absolute Magnitudes

WW Fornacis has an apparent magnitude of 9.26 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 WW Fornacis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -1.62 which gave the calculated distance to WW Fornacis as -2013.35 light years away from Earth or -617.28 parsecs. It would take a spaceship travelling at the speed of light, -2013.35 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of WW Fornacis

The star is a pulsating Semi-Regular Star which are giants or supergiants of intermediate and late spectral 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. WW Fornacis brightness ranges from a magnitude of 9.493 to a magnitude of 9.252 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 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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WW Fornacis Facts

Visual Facts


Primary / Proper / Traditional NameWW Fornacis
Alternative NamesHIP 8681, WW For
Spectral TypeK5
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour orange to red
GalaxyMilky Way
ConstellationFornax
Visual / Apparent Magnitude9.26
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)01h 51m 41.89
Declination (Dec.)-36° 48` 17.7
Galactic Latitude-74.00 degrees
Galactic Longitude253.89 degrees
Distance from Earth-1.62 Parallax (milliarcseconds)
 -2013.35 Light Years
 -617.28 Parsecs
B-V Index1.67

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star which are giants or supergiants of intermediate and late spectral
Mean Variability Period in Days0.200
Variable Magnitude Range (Brighter - Dimmer)9.252 - 9.493

Estimated Facts


Calculated Effective Temperature3,562 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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