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AU Antliae

AU Antliae Facts

  • AU Antliae is a pulsating giant star that can be located in the constellation of Antlia. The description is based on the spectral class.
  • AU Antliae is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M3III) of the star, the star's colour is red .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about -11648.69 light years away from us. Distance

AU Antliae's Alternative Names

HIP51112 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD90548.

AU Antliae has alternative name(s) :- , AU Ant.

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

Location of AU Antliae

The location of the giant 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 AU Antliae, the location is 10h 26m 34.67 and -34° 42` 03.0 .

Physical Properties of AU Antliae

AU Antliae Colour and Temperature

Based on the star's spectral type of M3III , AU Antliae's colour and type is red giant star. The star has a B-V Colour Index of 1.57 which means the star's temperature is about 3,850 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

AU Antliae Apparent and Absolute Magnitudes

AU Antliae has an apparent magnitude of 8.40 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 AU Antliae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.28000 which gave the calculated distance to AU Antliae as -11648.69 light years away from Earth or -3571.43 parsecs. If you want that in miles, it is about -68,478,284,598,350,185.97, based on 1 Ly = 5,878,625,373,183.61 miles.

Variable Type of AU Antliae

The star is a pulsating Semi-Regular Star w 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. AU Antliae brightness ranges from a magnitude of 8.505 to a magnitude of 8.276 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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Additional AU Antliae Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAU Antliae
Alternative NamesHD 90548, HIP 51112, AU Ant
Spectral TypeM3III
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeGiant Star
ColourRed
GalaxyMilky Way
ConstellationAntlia
Visual / Apparent Magnitude8.40
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)10h 26m 34.67
Declination (Dec.)-34° 42` 03.0
Galactic Latitude19.31399557 degrees
Galactic Longitude271.95458360 degrees
Distance from Earth-0.28000 Parallax (milliarcseconds)
 -11648.69 Light Years
 -3571.43 Parsecs
 -736,655,183.89 Astronomical Units
B-V Index1.57

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star w
Mean Variability Period in Days0.172
Variable Magnitude Range (Brighter - Dimmer)8.276 - 8.505

Estimated Calculated Facts


Effective Temperature3,850 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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