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WY Cancri, HIP44349

WY Cancri is a white to yellow eclipsing main sequence dwarf star that can be located in the constellation of Cancer. 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.

WY Cancri's Alternative Names

HIP44349 is the reference name for the star in the Hipparcos Star Catalogue.

WY Cancri has alternative name(s) :- , WY 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+27 1706.

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

Location of WY Cancri

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 WY Cancri, the location is 09h 01m 55.46 and +26° 41` 23.2 .

Proper Motion of WY Cancri

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 -48.61 ± 1.03 miliarcseconds/year towards the north and -12.01 ± 1.66 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is -12.70000 km/s with an error of about 1.00 km/s .

WY Cancri Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 0.98 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of WY Cancri

WY Cancri has a spectral type of G8V. This means the star is a white to yellow main sequence dwarf star. The star is 7,458.00 Parsecs from the Galactic Centre or terms of Light Years is 24,325.26 s. The star has a B-V Colour Index of 0.72 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,503 Kelvin.

WY Cancri Radius has been calculated as being 1.11 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 769,380.70.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 1.06. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

WY Cancri Apparent and Absolute Magnitudes

WY Cancri 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. If you used the 1997 Parallax value, you would get an absolute magnitude of 4.84 If you used the 2007 Parallax value, you would get an absolute magnitude of 4.94. 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 WY Cancri

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 11.76 which gave the calculated distance to WY Cancri as 277.35 light years away from Earth or 85.03 parsecs. It would take a spaceship travelling at the speed of light, 277.35 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 12.32 which put WY Cancri at a distance of 264.74 light years or 81.17 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.

The star's Galacto-Centric Distance is 7,458.00 Parsecs or 24,325.26 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of WY Cancri

The star is a eclipsing Beta Persei (Algol)/Semi-Detached System (subtype) 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. WY Cancri brightness ranges from a magnitude of 10.230 to a magnitude of 9.540 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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WY Cancri Facts

Visual Facts


Primary / Proper / Traditional NameWY Cancri
Alternative NamesHIP 44349, BD+27 1706, WY Cnc
Spectral TypeG8V
Multiple Star SystemNo / Unknown
Star Type main sequence Dwarf Star
Colour white to yellow
GalaxyMilky Way
ConstellationCancer
Absolute Magnitude4.84 / 4.94
Visual / Apparent Magnitude9.49
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)09h 01m 55.46
Declination (Dec.)+26° 41` 23.2
Galactic Latitude39.31 degrees
Galactic Longitude199.47 degrees
1997 Distance from Earth11.76 Parallax (milliarcseconds)
 277.35 Light Years
 85.03 Parsecs
2007 Distance from Earth12.32 Parallax (milliarcseconds)
 264.74 Light Years
 81.17 Parsecs
Galacto-Centric Distance24,325.26 Light Years / 7,458.00 Parsecs
Proper Motion Dec.-48.61 ± 1.03 milliarcseconds/year
Proper Motion RA.-12.01 ± 1.66 milliarcseconds/year
B-V Index0.72
Radial Velocity-12.70 ± 1.00 km/s
Eccentricity0.12
Semi-Major Axis7588.00
Stellar Luminosity (Lsun)0.98

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassEclipsing
Variable Star TypeBeta Persei (Algol)/Semi-Detached System (subtype)
Variable Magnitude Range (Brighter - Dimmer)9.540 - 10.230

Estimated Facts


Calculated Effective Temperature5,503 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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