Universe Guide

AB Pyxidis

AB Pyxidis Facts

  • AB Pyxidis is a pulsating supergiant star that can be located in the constellation of Pyxis. The description is based on the spectral class.
  • AB Pyxidis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M3/M4Ib) 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 4593.85 light years away from us. Distance

AB Pyxidis's Alternative Names

HIP41726 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD72268.

AB Pyxidis has alternative name(s) :- , AB Pyx.

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

Location of AB Pyxidis

The location of the supergiant 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 AB Pyxidis, the location is 08h 30m 29.80 and -36° 43` 16.8 .

Physical Properties of AB Pyxidis

AB Pyxidis Colour and Temperature

Based on the star's spectral type of M3/M4Ib , AB Pyxidis's colour and type is red supergiant star. The star has a B-V Colour Index of 1.9 which means the star's temperature is about 2,472 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

AB Pyxidis Radius

AB Pyxidis estimated radius has been calculated as being 315.39 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 219,447,064.03.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. It has been known to produce widely incorrect figures.

AB Pyxidis Apparent and Absolute Magnitudes

AB Pyxidis has an apparent magnitude of 6.78 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 -3.96 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 AB Pyxidis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.71000 which gave the calculated distance to AB Pyxidis as 4593.85 light years away from Earth or 1408.45 parsecs. If you want that in miles, it is about 27,005,523,170,599,526.80, based on 1 Ly = 5,878,625,373,183.61 miles.

Travel Time to AB Pyxidis

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A3807364,185,750,273.28
Speed of Sound (Mach 1)767.2694,015,165,738.65
Concorde (Mach 2)1,534.542,007,580,252.80
New Horizons Probe33,00093,354,915.19
Speed of Light670,616,629.004,593.85

Variable Type of AB Pyxidis

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. AB Pyxidis brightness ranges from a magnitude of 6.886 to a magnitude of 6.579 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.3 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 AB Pyxidis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameAB Pyxidis
Alternative NamesHD 72268, HIP 41726, AB Pyx
Spectral TypeM3/M4Ib
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star less luminour Supergiant Star
GalaxyMilky Way
Absolute Magnitude -3.96
Visual / Apparent Magnitude6.78
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)08h 30m 29.80
Declination (Dec.)-36° 43` 16.8
Galactic Latitude1.50034314 degrees
Galactic Longitude256.20553624 degrees
Distance from Earth0.71000 Parallax (milliarcseconds)
 4593.85 Light Years
 1408.45 Parsecs
 290,511,642.05 Astronomical Units
B-V Index1.9
Radial Velocity24.90000 ± 0.60 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSlow Irregular
Mean Variability Period in Days0.285
Variable Magnitude Range (Brighter - Dimmer)6.579 - 6.886

Estimated Calculated Facts

Radius (x the Sun)315.39
Effective Temperature2,472 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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