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63 Herculis, HD155514, HIP84054, HR6391

63 Herculis is a blue pulsating star that can be located in the constellation of Hercules. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

The Id of the star in the Yale Bright Star Catalogue is HR6391. HIP84054 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD155514.

63 Herculis has alternative name(s), V620 Her.

Location of 63 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 63 Herculis, the location is 17h 11m 03.17 and +24d 14` 15.4 .

Proper Motion of 63 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 31.13 ± 0.29 miliarcseconds/year towards the north and -11.47 ± 0.42 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is -2.20000 km/s with an error of about 2.90 km/s .

Physical Properties (Colour, Temperature, Radius) of 63 Herculis

63 Herculis has a spectral type of A8V. This means the star is a blue star. The star is 7352.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23979.5290508800000000s. The star has a B-V Colour Index of 0.22 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,650 Kelvin.

63 Herculis Radius has been calculated as being 2.68 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,862,302.95.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 2.52. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.09 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

63 Herculis Apparent and Absolute Magnitudes

63 Herculis has an apparent magnitude of 6.20 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 1.49 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.62. 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 63 Herculis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 11.41 which gave the calculated distance to 63 Herculis as 285.86 light years away from Earth or 87.64 parsecs. It would take a spaceship travelling at the speed of light, 285.86 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 12.15 which put 63 Herculis at a distance of 268.45 light years or 82.30 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 7,352.00 Parsecs or 23,979.53 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of 63 Herculis

The star is a pulsating Delta Scuti 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. 63 Herculis brightness ranges from a magnitude of 6.274 to a magnitude of 6.256 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.1 days (variability).

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.

63 Herculis Facts

Alternative Names

Traditional/Proper Name63 Herculis
Flamsteed Name63 Herculis
Flamsteed Short Name63 Her
Short NameV620 Her
Hipparcos Library I.D.84054
Yale Bright Star Catalogue (HR) Id6391
Bonner DurchmusterungBD+24 3140
Henry Draper Designation155514

Visual Facts

Star Type star
Absolute Magnitude1.49 / 1.62
Visual / Apparent Magnitude6.20
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)17h 11m 03.17
Declination (Dec.)+24d 14` 15.4
Galactic Latitude32.10 degrees
Galactic Longitude45.82 degrees
1997 Distance from Earth11.41 Parallax (milliarcseconds)
 285.86 Light Years
 87.64 Parsecs
2007 Revised Distance from Earth12.15 Parallax (milliarcseconds)
 268.45 Light Years
 82.30 Parsecs
Galacto-Centric Distance23,979.53 Light Years / 7,352.00 Parsecs
Proper Motion Dec.31.13 ± 0.29 milliarcseconds/year
Proper Motion RA.-11.47 ± 0.42 milliarcseconds/year
B-V Index0.22
Radial Velocity-2.20 ± 2.90 km/s
Iron Abundance-0.09 ± 9.99 Fe/H
Spectral TypeA8V
Colour(A) blue

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Scuti
Mean Variability Period in Days0.088
Variable Magnitude Range (Brighter - Dimmer)6.256 - 6.274

Estimated Facts

Calculated Effective Temperature7,650 Kelvin

Sources and Links

SIMBAD SourceLink

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