Universe Guide

104 Herculis - HD167006 - HIP89172

104 Herculis is a red eruptive giant star that can be located in the constellation of Hercules. 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. 104 Herculis has alternative name(s), 104 Herculis.

Location of 104 Herculis

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 104 Herculis, the location is 18h 11m 54.17 and +31 d 24 ` 19.0 .

Physical Properties/View of 104 Herculis

104 Herculis has a spectral type of M3III. This means the star is (M) red coloured (III) giant. 104 Herculis lies at a distance of 601.78 light years away from our Sun and our planet Earth or to put it another way, 184.26 parsecs away from the Sun.

104 Herculis has an apparent magnitude of 4.96 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 104 Herculis has an absolute magnitude of -1.37 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 2400 and 3700 based on the Class Type and lookup at Wikipedia-Stellar Classification

Variable Type of 104 Herculis

The star is a eruptive 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. 104 Herculis brightness ranges from a magnitude of 5.000 to a magnitude of 5.000 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.

104 Herculis Facts

Traditional Name104 Herculis
Short NameV669 Her
Alternative Name(s)104 Herculis
Hipparcos Library I.D.89172
Henry Draper Designation167006
Celestial TypeStar
Absolute Magnitude-1.37
Apparent Magnitude4.96
Right Ascension (R.A.)18h 11m 54.17
Declination (Dec.)+31 d 24 ` 19.0
Distance from the Sun / Earth601.78 Light Years
Spectral TypeM3III
Colour (M) red
Star Type (III) giant.
Variable Star ClassEruptive
Variable Star TypeIrregular
Variable Magnitude Range (Brighter - Dimmer)5.000 - 5.000
Calculated Temperature Range2,400.00 - 3,700.00

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