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113 Herculis - HD175492 - HIP92818

113 Herculis is a white to yellow giant star that can be located in the constellation of Hercules. 113 Herculis is the brightest star in Hercules based on the Hipparcos 2007 apparent magnitude. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP92818 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD175492.

113 Herculis has alternative name(s), 113 Herculis , 113 Her.

Location of 113 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 along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For 113 Herculis, the location is 18h 54m 44.88 and +22d38`42.3 .

Proper Motion of 113 Herculis

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving 1.36 ± 0.19 miliarcseconds/year towards the north and 6.62 ± 0.29 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 113 Herculis

113 Herculis has a spectral type of G4III+.... This means the star is a white to yellow giant star. The star is 7317.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23865.3718804800000000s. The star has a B-V Colour Index of 0.78 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,337 Kelvin.

113 Herculis Radius has been calculated as being 19.88 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 13,829,490.73.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 19.25. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

113 Herculis Apparent and Absolute Magnitudes

113 Herculis has an apparent magnitude of 4.57 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of -1.30 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.23. 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 113 Herculis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.71 which gave the calculated distance to 113 Herculis as 486.09 light years away from Earth or 149.03 parsecs. It would take a spaceship travelling at the speed of light, 486.09 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 6.91 which put 113 Herculis at a distance of 472.02 light years or 144.72 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,317.00 Parsecs or 23,865.37 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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.

113 Herculis Facts

Alternative Names

Traditional/Proper Name113 Herculis
Short Name113 Her
Alternative Name(s)113 Herculis
Hipparcos Library I.D.92818
Bonner DurchmusterungBDD+22 3524
Henry Draper Designation175492

Visual Facts

Star Typegiant star
Absolute Magnitude-1.30 / -1.23
Visual / Apparent Magnitude4.57
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)18h 54m 44.88
Declination (Dec.)+22d38`42.3
Galactic Latitude9.42 degrees
Galactic Longitude53.63 degrees
1997 Distance from Earth6.71 Parallax (milliarcseconds)
 486.09 Light Years
 149.03 Parsecs
2007 Revised Distance from Earth6.91 Parallax (milliarcseconds)
 472.02 Light Years
 144.72 Parsecs
Galacto-Centric Distance23,865.37 Light Years / 7,317.00 Parsecs
Proper Motion Dec.1.36 ± 0.19 milliarcseconds/year
Proper Motion RA.6.62 ± 0.29 milliarcseconds/year
B-V Index0.78
Radial Velocity-19.40 ± 2.20 km/s
Eccentricity0.10
Inclination40.20
Semi-Major Axis2.37
Orbital Period (Days)245.52
Argument Of Periastron186.70
Spectral TypeG4III+...
Colour(G) White to Yellow

Estimated Facts

Calculated Effective Temperature5,337 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.


Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
175492+22 3524.0A4.600005.00000-4.00000G0Yellow
175493B11.10000A3White1878
C11.100001924

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