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QU Carinae, HD310376, HIP54226

QU Carinae is a blue cataclysmic variable star that can be located in the constellation of Carina. 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.

QU Carinae's Alternative Names

HIP54226 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD310376.

QU Carinae has alternative name(s) :- , QU Car.

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

Location of QU Carinae

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 QU Carinae, the location is 11h 05m 42.51 and -68° 37` 58.2 .

Proper Motion of QU Carinae

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 0.91 ± 1.09 miliarcseconds/year towards the north and -13.67 ± 1.32 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 -84.00000 km/s with an error of about 10.00 km/s .

Physical Properties (Colour, Temperature) of QU Carinae

QU Carinae has a spectral type of B+.... This means the star is a blue variable star. The star has a B-V Colour Index of 0 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 10,293 Kelvin.

QU Carinae Radius has been calculated as being 0.90 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 628,461.61.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 0.59. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

QU Carinae Apparent and Absolute Magnitudes

QU Carinae has an apparent magnitude of 11.49 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 2.56 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.50. 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 QU Carinae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.64 which gave the calculated distance to QU Carinae as 1988.80 light years away from Earth or 609.76 parsecs. It would take a spaceship travelling at the speed of light, 1988.80 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 2.52 which put QU Carinae at a distance of 1294.30 light years or 396.83 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.

Variable Type of QU Carinae

The star is a cataclysmic Novalike 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. QU Carinae brightness ranges from a magnitude of 11.682 to a magnitude of 11.218 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.4 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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QU Carinae Facts

Visual Facts

Primary / Proper / Traditional NameQU Carinae
Alternative NamesHD 310376, HIP 54226, QU Car
Spectral TypeB+...
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour blue
GalaxyMilky Way
Absolute Magnitude2.56 / 3.50
Visual / Apparent Magnitude11.49
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)11h 05m 42.51
Declination (Dec.)-68° 37` 58.2
Galactic Latitude-7.72 degrees
Galactic Longitude293.51 degrees
1997 Distance from Earth1.64 Parallax (milliarcseconds)
 1988.80 Light Years
 609.76 Parsecs
2007 Distance from Earth2.52 Parallax (milliarcseconds)
 1294.30 Light Years
 396.83 Parsecs
Proper Motion Dec.0.91 ± 1.09 milliarcseconds/year
Proper Motion RA.-13.67 ± 1.32 milliarcseconds/year
B-V Index0.00
Radial Velocity-84.00 ± 10.00 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassCataclysmic
Variable Star TypeNovalike
Mean Variability Period in Days0.369
Variable Magnitude Range (Brighter - Dimmer)11.218 - 11.682

Estimated Facts

Calculated Effective Temperature10,293 Kelvin

Sources and Links

SIMBAD SourceLink

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