Universe Guide

11 Geminorum - HD43818 - HIP30046

11 Geminorum is a blue pulsating luminous giant star that can be located in the constellation of Gemini. HIP is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD. 11 Geminorum has alternative name(s), 11 Geminorum.

Location of 11 Geminorum

The location of the star in the galaxy 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 from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 11 Geminorum, the location is 06h 19m 19.30 and +23 d 28 ` 09.9 .

Physical Properties/View of 11 Geminorum

11 Geminorum has a spectral type of B0II. This means the star is (B) blue coloured (II) luminous giant. 11 Geminorum lies at a distance of 2,249.40 light years away from our Sun and our planet Earth or to put it another way, 689.53 parsecs away from the Sun.

11 Geminorum has an apparent magnitude of 6.91 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 11 Geminorum has an absolute magnitude of -2.28 which is the apparent magnitude of an object if it were 32.6 light years away or 10 parsecs from Earth. 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. The stars temperature has been calculated at between 10000 and 30000 based on the Class Type and lookup at Wikipedia-Stellar Classification

Variable Type of 11 Geminorum

The star is a pulsating Beta Cephei 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. 11 Geminorum brightness ranges from a magnitude of 7.000 to a magnitude of 7.000 over its variable period. The smaller the magnitude, the brighter the star.

Source of Information

The source of the information came 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.

11 Geminorum Facts

Traditional Name11 Geminorum
Short NameLU Gem
Alternative Name(s)11 Geminorum
Hipparcos Library I.D.30046
Henry Draper Designation43818
Celestial TypeStar
Absolute Magnitude-2.28
Apparent Magnitude6.91
Right Ascension (R.A.)06h 19m 19.30
Declination (Dec.)+23 d 28 ` 09.9
Distance from the Sun / Earth2,249.40 Light Years
Spectral TypeB0II
Colour (B) blue
Star Type (III) giant.
Variable Star ClassPulsating
Variable Star TypeBeta Cephei
Variable Magnitude Range (Brighter - Dimmer)7.000 - 7.000
Calculated Temperature Range10,000.00 - 30,000.00

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