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AA Sculptoris

AA Sculptoris Facts

  • AA Sculptoris is a pulsating luminous giant star that can be located in the constellation of Sculptor. The description is based on the spectral class.
  • AA Sculptoris is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M3II) 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.
  • Using the most recent figures given by the 2007 Hipparcos data, the star is 4128.65 light years away from us. Distance

AA Sculptoris's Alternative Names

HIP2880 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD3373.

AA Sculptoris has alternative name(s) :- , AA Scl.

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

Location of AA Sculptoris

The location of the luminous 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 AA Sculptoris, the location is 00h 36m 28.94 and -30° 20` 01.1 .

Radial Velocity and Proper Motion of AA Sculptoris

Proper Motion

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -1.30 ± 0.65 milliarcseconds/year towards the north and 6.77 ± 0.96 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -4.00000 km/s with an error of about 4.60 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties of AA Sculptoris

AA Sculptoris Colour and Temperature

Based on the star's spectral type of M3II , AA Sculptoris's colour and type is red luminous giant star. The star has a B-V Colour Index of 1.4 which means the star's temperature is about 4,209 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

AA Sculptoris Radius

AA Sculptoris estimated radius has been calculated as being 11.18 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 7,780,730.22.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 38.420432030945590705632005411. 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.

AA Sculptoris Apparent and Absolute Magnitudes

AA Sculptoris has an apparent magnitude of 8.81 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 0.98 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.70. 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 Sculptoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.72000 which gave the calculated distance to AA Sculptoris as 1199.13 light years away from Earth or 367.65 parsecs. If you want that in miles, it is about 7,049,236,043,745,662.26, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 0.79000 which put AA Sculptoris at a distance of 4128.65 light years or 1265.82 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

Using the 2007 distance, the star is roughly 261,092,297.73 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

Travel Time to AA Sculptoris

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)
Walking4692,185,336,330.21
Car12023,072,844,544.34
Airbus A3807363,761,876,827.88
Speed of Sound (Mach 1)767.2693,608,566,676.51
Concorde (Mach 2)1,534.541,804,280,986.69
New Horizons Probe33,00083,901,252.89
Speed of Light670,616,629.004,128.65

Variable Type of AA Sculptoris

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. AA Sculptoris brightness ranges from a magnitude of 8.991 to a magnitude of 8.653 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 AA Sculptoris Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAA Sculptoris
Alternative NamesHD 3373, HIP 2880, AA Scl
Spectral TypeM3II
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeLuminous Giant Star
ColourRed
GalaxyMilky Way
ConstellationSculptor
Absolute Magnitude 0.98 / -1.70
Visual / Apparent Magnitude8.81
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)00h 36m 28.94
Declination (Dec.)-30° 20` 01.1
Galactic Latitude-85.41551787 degrees
Galactic Longitude347.69335796 degrees
1997 Distance from Earth2.72000 Parallax (milliarcseconds)
 1199.13 Light Years
 367.65 Parsecs
2007 Distance from Earth0.79000 Parallax (milliarcseconds)
 4128.65 Light Years
 1265.82 Parsecs
 261,092,297.73 Astronomical Units
Proper Motion Dec.-1.30000 ± 0.65000 milliarcseconds/year
Proper Motion RA.6.77000 ± 0.96000 milliarcseconds/year
B-V Index1.4
Radial Velocity-4.00000 ± 4.60 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 Days0.333
Variable Magnitude Range (Brighter - Dimmer)8.653 - 8.991

Estimated Calculated Facts


Radius (x the Sun)38.42
Effective Temperature4,209 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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