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YZ Pyxidis, HD71913, HIP41586

YZ Pyxidis is a blue pulsating luminous giant star that can be located in the constellation of Pyxis. The description is based on the spectral class. YZ Pyxidis 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.

YZ Pyxidis's Alternative Names

HIP41586 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD71913.

YZ Pyxidis has alternative name(s) :- , YZ Pyx.

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

Location of YZ Pyxidis

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 YZ Pyxidis, the location is 08h 28m 43.01 and -34° 43` 53.9 .

Physical Properties (Colour, Temperature) of YZ Pyxidis

YZ Pyxidis has a spectral type of B1/B2II. This means the star is a blue luminous giant star. The star has a B-V Colour Index of -0.11 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 14,384 Kelvin.

YZ Pyxidis Radius has been calculated as being 8.11 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 5,645,006.07.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

YZ Pyxidis Apparent and Absolute Magnitudes

YZ Pyxidis has an apparent magnitude of 7.68 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 -3.66 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 YZ Pyxidis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.54 which gave the calculated distance to YZ Pyxidis as 6040.06 light years away from Earth or 1851.85 parsecs. It would take a spaceship travelling at the speed of light, 6040.06 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of YZ Pyxidis

The star is a pulsating Beta Cephei 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. YZ Pyxidis brightness ranges from a magnitude of 7.661 to a magnitude of 7.625 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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YZ Pyxidis Facts

Visual Facts


Primary / Proper / Traditional NameYZ Pyxidis
Alternative NamesHD 71913, HIP 41586, YZ Pyx
Spectral TypeB1/B2II
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeLuminous Giant Star
Colour blue
GalaxyMilky Way
ConstellationPyxis
Absolute Magnitude -3.66
Visual / Apparent Magnitude7.68
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)08h 28m 43.01
Declination (Dec.)-34° 43` 53.9
Galactic Latitude2.37 degrees
Galactic Longitude254.38 degrees
Distance from Earth0.54 Parallax (milliarcseconds)
 6040.06 Light Years
 1851.85 Parsecs
 381,968,819.85 Astronomical Units
B-V Index-0.11

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeBeta Cephei
Mean Variability Period in Days0.206
Variable Magnitude Range (Brighter - Dimmer)7.625 - 7.661

Estimated Facts


Calculated Effective Temperature14,384 Kelvin

Sources and Links


SIMBAD SourceLink

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