Universe Guide

100 Herculis - HD166046 - HIP88817

100 Herculis is a blue main sequence dwarf 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. 100 Herculis has alternative name(s), 100 Herculis. 100 Herculis is a multiple star system with 2 stars orbiting in its solar system.

Location of 100 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 100 Herculis, the location is 18h 07m 49.51 and +26 d 05 ` 50.2 .

Physical Properties/View of 100 Herculis

100 Herculis has a spectral type of A3V. This means the star is (A) blue coloured (V) main sequence (dwarf star). 100 Herculis lies at a distance of 165.99 light years away from our Sun and our planet Earth or to put it another way, 50.59 parsecs away from the Sun.

100 Herculis has an apparent magnitude of 5.79 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 100 Herculis has an absolute magnitude of 2.26 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 7500 and 10000 based on the Class Type and lookup at Wikipedia-Stellar Classification

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.

100 Herculis Facts


Traditional Name100 Herculis
Alternative Name(s)100 Herculis
Hipparcos Library I.D.88817
Henry Draper Designation166046
Celestial TypeStar
Absolute Magnitude2.26
Apparent Magnitude5.79
Right Ascension (R.A.)18h 07m 49.51
Declination (Dec.)+26 d 05 ` 50.2
Distance from the Sun / Earth165.99 Light Years
Spectral TypeA3V
Colour (A) blue
Star Type (IV) subgiant.
Stars in Solar System2
Variable Star ClassConstant, non-variable
Calculated Temperature Range7,500.00 - 10,000.00


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