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GS Orionis

GS Orionis Facts

  • GS Orionis is a pulsating variable star that can be located in the constellation of Orion. The description is based on the spectral class.
  • GS Orionis is not part of the constellation outline but is within the borders of the constellation.
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about -6040.06 light years away from us. Distance

GS Orionis's Alternative Names

HIP25701 is the reference name for the star in the Hipparcos Star Catalogue.

GS Orionis has alternative name(s) :- GS Ori, GS Ori.

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+03 924.

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

Location of GS Orionis

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 GS Orionis, the location is 05h 29m 17.43 and +03° 29` 01.2 .

Physical Properties of GS Orionis

GS Orionis Temperature and Colour

Based on the star's spectral type of N0v The star has a B-V Colour Index of 2.1 which means the star's temperature is about 1,181 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

GS Orionis Radius

GS Orionis Apparent and Absolute Magnitudes

GS Orionis has an apparent magnitude of 9.99 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 GS Orionis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.54000 which gave the calculated distance to GS Orionis as -6040.06 light years away from Earth or -1851.85 parsecs. If you want that in miles, it is about -35,507,249,971,551,395.42, based on 1 Ly = 5,878,625,373,183.61 miles.

Variable Type of GS Orionis

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. GS Orionis brightness ranges from a magnitude of 10.407 to a magnitude of 9.736 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 154.5 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 GS Orionis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameGS Orionis
Alternative NamesGS Ori, HIP 25701, BD+03 924, GS Ori
Spectral TypeN0v
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
ConstellationOrion
Visual / Apparent Magnitude9.99
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)05h 29m 17.43
Declination (Dec.)+03° 29` 01.2
Galactic Latitude-16.49501523 degrees
Galactic Longitude200.05123175 degrees
Distance from Earth-0.54000 Parallax (milliarcseconds)
 -6040.06 Light Years
 -1851.85 Parsecs
 -381,968,819.85 Astronomical Units
B-V Index2.1
Radial Velocity18.00000 ± 4.10 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 Days154.500
Variable Magnitude Range (Brighter - Dimmer)9.736 - 10.407

Estimated Calculated Facts


Effective Temperature1,181 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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