Universe Guide

AA Andromedae

AA Andromedae Facts

AA Andromedae's Alternative Names

HIP114012 is the reference name for the star in the Hipparcos Star Catalogue.

AA Andromedae has alternative name(s) :- AA And, AA And.

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+46 3929.

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

Location of AA Andromedae

The location of the main sequence 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 AA Andromedae, the location is 23h 05m 22.85 and +47° 40` 34.8 .

Physical Properties (Colour, Temperature) of AA Andromedae

AA Andromedae Colour and Temperature

AA Andromedae has a spectral type of B9V. This means the star is a blue main sequence star. The star has a B-V Colour Index of 0.15 which means the star's temperature is about 8,084 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

AA Andromedae Apparent and Absolute Magnitudes

AA Andromedae has an apparent magnitude of 10.88 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 AA Andromedae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -3.76 which gave the calculated distance to AA Andromedae as -867.46 light years away from Earth or -265.96 parsecs. If you want that in miles, it is -581,733,100,992.

Variable Type of AA Andromedae

The star is a eclipsing binary sys Beta Lyrae (Sheliak) 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. AA Andromedae brightness ranges from a magnitude of 11.499 to a magnitude of 10.872 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.9 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 AA Andromedae Facts and Figures

Visual Facts

Primary / Proper / Traditional NameAA Andromedae
Alternative NamesAA And, HIP 114012, BD+46 3929, AA And
Spectral TypeB9V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
GalaxyMilky Way
Visual / Apparent Magnitude10.88
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)23h 05m 22.85
Declination (Dec.)+47° 40` 34.8
Galactic Latitude-11.48 degrees
Galactic Longitude105.07 degrees
Distance from Earth-3.76 Parallax (milliarcseconds)
 -867.46 Light Years
 -265.96 Parsecs
 -54,857,805.61 Astronomical Units
B-V Index0.15

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEclipsing binary sys
Variable Star TypeBeta Lyrae (Sheliak)
Mean Variability Period in Days0.935
Variable Magnitude Range (Brighter - Dimmer)10.872 - 11.499

Estimated Calculated Facts

Effective Temperature8,084 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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