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V984 Herculis

V984 Herculis Facts

V984 Herculis's Alternative Names

HIP88823 is the reference name for the star in the Hipparcos Star Catalogue.

V984 Herculis has alternative name(s) :- , V984 Her.

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+45 2659.

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

Location of V984 Herculis

The location of the variable 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 V984 Herculis, the location is 18h 07m 52.84 and +45° 02` 53.1 .

Physical Properties (Colour, Temperature) of V984 Herculis

V984 Herculis Colour and Temperature

V984 Herculis has a spectral type of M0. This means the star is a red variable star. The star has a B-V Colour Index of 1.63 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,689 Kelvin.

V984 Herculis Radius

Radius has been calculated as being 31.85 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 22,160,399.65.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V984 Herculis Apparent and Absolute Magnitudes

V984 Herculis has an apparent magnitude of 9.51 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of -0.72 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 V984 Herculis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.90 which gave the calculated distance to V984 Herculis as 3624.04 light years away from Earth or 1111.11 parsecs. It would take a spaceship travelling at the speed of light, 3624.04 years to get there. We don't have the technology or spaceship that can carry people over that distance yet. V984 Herculis brightness ranges from a magnitude of 9.668 to a magnitude of 9.565 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.

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Additional V984 Herculis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameV984 Herculis
Alternative NamesHIP 88823, BD+45 2659, V984 Her
Spectral TypeM0
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourRed
GalaxyMilky Way
ConstellationHercules
Absolute Magnitude -0.72
Visual / Apparent Magnitude9.51
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)18h 07m 52.84
Declination (Dec.)+45° 02` 53.1
Galactic Latitude26.20 degrees
Galactic Longitude72.29 degrees
Distance from Earth0.90 Parallax (milliarcseconds)
 3624.04 Light Years
 1111.11 Parsecs
 229,181,291.91 Astronomical Units
B-V Index1.63

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.067
Variable Magnitude Range (Brighter - Dimmer)9.565 - 9.668

Estimated Calculated Facts


Radius (x the Sun)31.85
Effective Temperature3,689 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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