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113 Herculis (113 Herculis A) Star Facts

113 Herculis Facts

113 Herculis's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR7133. HIP92818 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD175493.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John named the stars in the constellation with a number and its latin name, this star's Flamsteed designation is 113 Herculis A. The Flamsteed name can be shortened to 113 Her A.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+22 3524.

More details on objects' alternative names can be found at Star Names .

Location of 113 Herculis

The location of the giant star in the night sky 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 object is compared to the celestial equator and is expressed in degrees. For 113 Herculis, the location is 18h 54m 44.88 and +22° 38` 42.3 .

Radial Velocity and Proper Motion of 113 Herculis

Proper Motion

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 milliarcseconds/year towards the north and 6.62 ± 0.29 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -19.40 km/s with an error of about 2.20 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

113 Herculis Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 313.91 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of 113 Herculis

113 Herculis Colour and Temperature

113 Herculis has a spectral type of G4III+.... This means the star is a yellow giant star. The star has a B-V Colour Index of 0.78 which means the star's temperature is about 5,337 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

113 Herculis Radius

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. If you need the diameter of the star, you just need to multiple the radius by 2. 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. If you want that in miles, it is 325,980,037,191.

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.

Using the 2007 distance, the star is roughly 29,850,434.76 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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*.

Travel Time to 113 Herculis

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Walking479,136,115,305.15
Car1202,637,870,510.17
Airbus A380736430,087,583.18
Speed of Sound (Mach 1)767.269412,559,951.23
Concorde (Mach 2)1,534.54206,279,706.77
New Horizons Probe33,0009,592,256.40
Speed of Light670,616,629.00472.02

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.

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Additional 113 Herculis Facts and Figures

Visual Facts


Primary / Proper / Traditional Name113 Herculis
Alternative NamesHD 175493, HIP 92818, HR 7133, 113 Herculis A, 113 Her A, BD+22 3524
Spectral TypeG4III+...
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeGiant Star
ColourYellow
GalaxyMilky Way
ConstellationHercules
Absolute Magnitude -1.30 / -1.23
Visual / Apparent Magnitude4.57
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)18h 54m 44.88
Declination (Dec.)+22° 38` 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 Distance from Earth6.91 Parallax (milliarcseconds)
 472.02 Light Years
 144.72 Parsecs
 29,850,434.76 Astronomical Units
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
Eccentricity0.01
Inclination40.20
Semi-Major Axis7291.00
Stellar Luminosity (Lsun)313.91
Orbital Period (Days)245.52
Argument Of Periastron186.70

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)19.25
Effective Temperature5,337 Kelvin

Sources and Links


SIMBAD SourceLink

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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