Universe Guide

W Cancri

W Cancri Facts

W Cancri's Alternative Names

HIP44995 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD78585.

W Cancri has alternative name(s) :- W Cnc, W Cnc.

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+25 2053a.

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

Location of W Cancri

The location of the variable 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 W Cancri, the location is 09h 09m 52.63 and +25° 14` 53.9 .

Physical Properties (Colour, Temperature) of W Cancri

W Cancri Colour and Temperature

W Cancri has a spectral type of M6.5e-M9e. This means the star is a red variable star. The star has a B-V Colour Index of 1.5 which means the star's temperature is about 4,014 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

W Cancri Apparent and Absolute Magnitudes

W Cancri has an apparent magnitude of 10.20 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 Cancri

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -11.89 which gave the calculated distance to W Cancri as -274.32 light years away from Earth or -84.10 parsecs. If you want that in miles, it is -183,963,553,667.

Variable Type of W Cancri

The star is a pulsating Omicron Ceti 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 Cancri brightness ranges from a magnitude of 11.844 to a magnitude of 7.942 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 389.9 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.

Hide Explanations
Show GridLines

Additional W Cancri Facts and Figures

Visual Facts

Primary / Proper / Traditional NameW Cancri
Alternative NamesW Cnc, HD 78585, HIP 44995, BD+25 2053a, W Cnc
Spectral TypeM6.5e-M9e
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
Visual / Apparent Magnitude10.20
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)09h 09m 52.63
Declination (Dec.)+25° 14` 53.9
Galactic Latitude40.67 degrees
Galactic Longitude201.88 degrees
Distance from Earth-11.89 Parallax (milliarcseconds)
 -274.32 Light Years
 -84.10 Parsecs
 -17,346,749.33 Astronomical Units
B-V Index1.50
Radial Velocity49.00 ± 4.70 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeOmicron Ceti
Mean Variability Period in Days389.900
Variable Magnitude Range (Brighter - Dimmer)7.942 - 11.844

Estimated Calculated Facts

Effective Temperature4,014 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.

You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.

This website is using cookies. More info. That's Fine