Universe Guide

111 Herculis - HD173880 - HIP92161

111 Herculis is a blue 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. 111 Herculis has alternative name(s), 111 Herculis.

Location of 111 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 111 Herculis, the location is 18h 47m 01.22 and +18 d 10 ` 52.4 .

Physical Properties/View of 111 Herculis

111 Herculis has a spectral type of A5III. This means the star is (A) blue coloured (III) giant. 111 Herculis lies at a distance of 92.74 light years away from our Sun and our planet Earth or to put it another way, 28.21 parsecs away from the Sun.

111 Herculis has an apparent magnitude of 4.34 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 111 Herculis has an absolute magnitude of 2.07 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 star's effective temperature is 8,334 Kelvin which is hotter than our own Sun's effective Temperature which is 5,777 Kelvin.

111 Herculis Radius has been calculated as being 1.77 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,231,565.99. km. The star's solar mass is 2.00 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

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.

111 Herculis Facts


Traditional Name111 Herculis
Alternative Name(s)111 Herculis
Hipparcos Library I.D.92161
Henry Draper Designation173880
Celestial TypeStar
Absolute Magnitude2.07
Apparent Magnitude4.34
Right Ascension (R.A.)18h 47m 01.22
Declination (Dec.)+18 d 10 ` 52.4
Distance from the Sun / Earth92.74 Light Years
Spectral TypeA5III
Colour (A) blue
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Radius (x the Sun)1.77
Calculated Temperature Range7,500.00 - 10,000.00
Mass Compared to the Sun2.00


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