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AQ Ceti

AQ Ceti Facts

  • AQ Ceti is a pulsating variable star that can be located in the constellation of Cetus. The description is based on the spectral class.
  • AQ Ceti is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (Mc) 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 -5346.94 light years away from us. Distance

AQ Ceti's Alternative Names

HIP8521 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD11193.

AQ Ceti has alternative name(s) :- , AQ Cet.

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-05 323.

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

Location of AQ Ceti

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 AQ Ceti, the location is 01h 49m 54.61 and -04° 51` 34.3 .

Physical Properties of AQ Ceti

AQ Ceti Temperature and Colour

Based on the star's spectral type of Mc , AQ Ceti's colour and type is red variable star. The star has a B-V Colour Index of 1.33 which means the star's temperature is about 4,333 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

AQ Ceti Radius

AQ Ceti Apparent and Absolute Magnitudes

AQ Ceti has an apparent magnitude of 8.36 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 AQ Ceti

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.61000 which gave the calculated distance to AQ Ceti as -5346.94 light years away from Earth or -1639.34 parsecs. If you want that in miles, it is about -31,432,657,152,890,371.65, based on 1 Ly = 5,878,625,373,183.61 miles.

Variable Type of AQ Ceti

The star is a pulsating Slow Irregular 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. AQ Ceti brightness ranges from a magnitude of 8.201 to a magnitude of 8.013 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 AQ Ceti Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAQ Ceti
Alternative NamesHD 11193, HIP 8521, BD-05 323, AQ Cet
Spectral TypeMc
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourRed
GalaxyMilky Way
ConstellationCetus
Visual / Apparent Magnitude8.36
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)01h 49m 54.61
Declination (Dec.)-04° 51` 34.3
Galactic Latitude-63.72904870 degrees
Galactic Longitude157.55244146 degrees
Distance from Earth-0.61000 Parallax (milliarcseconds)
 -5346.94 Light Years
 -1639.34 Parsecs
 -338,135,791.31 Astronomical Units
B-V Index1.33

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeSlow Irregular
Mean Variability Period in Days0.179
Variable Magnitude Range (Brighter - Dimmer)8.013 - 8.201

Estimated Calculated Facts


Effective Temperature4,333 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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