Universe Guide

GI Carinae

GI Carinae Facts

  • GI Carinae is a pulsating luminous giant star that can be located in the constellation of Carina. The description is based on the spectral class.
  • GI Carinae is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (F4II) of the star, the star's colour is yellow to white .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about -7955.20 light years away from us. Distance

GI Carinae's Alternative Names

HIP54862 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD97746.

GI Carinae has alternative name(s) :- GI Car, GI Car.

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

Location of GI Carinae

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 GI Carinae, the location is 11h 14m 00.05 and -57° 54` 39.3 .

Physical Properties of GI Carinae

GI Carinae Temperature and Colour

Based on the star's spectral type of F4II , GI Carinae's colour and type is yellow to white luminous giant star. The star has a B-V Colour Index of 0.72 which means the star's temperature is about 5,603 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

GI Carinae Radius

GI Carinae Apparent and Absolute Magnitudes

GI Carinae has an apparent magnitude of 8.32 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 GI Carinae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.41000 which gave the calculated distance to GI Carinae as -7955.20 light years away from Earth or -2439.02 parsecs. If you want that in miles, it is about -46,765,640,568,750,254.27, based on 1 Ly = 5,878,625,373,183.61 miles.

Variable Type of GI Carinae

The star is a pulsating Delta Cepheid 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. GI Carinae brightness ranges from a magnitude of 8.608 to a magnitude of 8.246 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 4.4 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 GI Carinae Facts and Figures

Visual Facts

Primary / Proper / Traditional NameGI Carinae
Alternative NamesGI Car, HD 97746, HIP 54862, GI Car
Spectral TypeF4II
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeLuminous Giant Star
ColourYellow - White
GalaxyMilky Way
Visual / Apparent Magnitude8.32
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)11h 14m 00.05
Declination (Dec.)-57° 54` 39.3
Galactic Latitude2.54392236 degrees
Galactic Longitude290.26231783 degrees
Distance from Earth-0.41000 Parallax (milliarcseconds)
 -7955.20 Light Years
 -2439.02 Parsecs
 -503,080,482.22 Astronomical Units
B-V Index0.72
Radial Velocity-21.40000 ± 3.10 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Cepheid
Mean Variability Period in Days4.431
Variable Magnitude Range (Brighter - Dimmer)8.246 - 8.608

Estimated Calculated Facts

Effective Temperature5,603 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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