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QT Coronae Australis

QT Coronae Australis Facts

QT Coronae Australis's Alternative Names

HIP88933 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD325013.

QT Coronae Australis has alternative name(s) :- , QT CrA.

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

Location of QT Coronae Australis

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 QT Coronae Australis, the location is 18h 09m 12.39 and -40° 12` 13.0 .

Physical Properties (Colour, Temperature) of QT Coronae Australis

QT Coronae Australis Colour and Temperature

QT Coronae Australis has a spectral type of A/Fe-K. This means the star is a blue variable star. The star has a B-V Colour Index of 1.49 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,035 Kelvin.

QT Coronae Australis Apparent and Absolute Magnitudes

QT Coronae Australis has an apparent magnitude of 10.61 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 QT Coronae Australis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -2.29 which gave the calculated distance to QT Coronae Australis as -1424.29 light years away from Earth or -436.68 parsecs. It would take a spaceship travelling at the speed of light, -1424.29 years to get there. We don't have the technology or spaceship that can carry people over that distance yet. QT Coronae Australis brightness ranges from a magnitude of 11.310 to a magnitude of 10.482 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.8 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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Additional QT Coronae Australis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameQT Coronae Australis
Alternative NamesHD 325013, HIP 88933, QT CrA
Spectral TypeA/Fe-K
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourBlue
GalaxyMilky Way
ConstellationCorona Australis
Visual / Apparent Magnitude10.61
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)18h 09m 12.39
Declination (Dec.)-40° 12` 13.0
Galactic Latitude-9.78 degrees
Galactic Longitude352.56 degrees
Distance from Earth-2.29 Parallax (milliarcseconds)
 -1424.29 Light Years
 -436.68 Parsecs
 -90,071,087.97 Astronomical Units
B-V Index1.49
Radial Velocity-352.40 ± 0.60 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.790
Variable Magnitude Range (Brighter - Dimmer)10.482 - 11.310

Estimated Calculated Facts


Effective Temperature 4,035 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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