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XZ Herculis, HD348058, HIP89018

XZ Herculis is a red pulsating variable star that can be located in the constellation of Hercules. The description is based on the spectral class. The star can not be seen by the naked eye, you need a telescope to see it.

XZ Herculis's Alternative Names

HIP89018 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD348058.

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

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

Location of XZ Herculis

The location of the 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 star is compared to the celestial equator and is expressed in degrees. For XZ Herculis, the location is 18h 10m 03.62 and +18° 06` 25.5 .

Physical Properties (Colour, Temperature) of XZ Herculis

XZ 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 1.5 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,014 Kelvin.

XZ Herculis Apparent and Absolute Magnitudes

XZ Herculis has an apparent magnitude of 11.93 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 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 XZ Herculis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -9.79 which gave the calculated distance to XZ Herculis as -333.16 light years away from Earth or -102.15 parsecs. It would take a spaceship travelling at the speed of light, -333.16 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of XZ Herculis

The star is a pulsating Omicron Ceti 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. XZ Herculis brightness ranges from a magnitude of 13.000 to a magnitude of 11.113 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 173.9 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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XZ Herculis Facts

Visual Facts


Primary / Proper / Traditional NameXZ Herculis
Alternative NamesHD 348058, HIP 89018, XZ Her
Spectral TypeM0
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour red
GalaxyMilky Way
ConstellationHercules
Visual / Apparent Magnitude11.93
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)18h 10m 03.62
Declination (Dec.)+18° 06` 25.5
Galactic Latitude17.07 degrees
Galactic Longitude44.93 degrees
Distance from Earth-9.79 Parallax (milliarcseconds)
 -333.16 Light Years
 -102.15 Parsecs
B-V Index1.50
Radial Velocity34.00 ± 999.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeOmicron Ceti
Mean Variability Period in Days173.900
Variable Magnitude Range (Brighter - Dimmer)11.113 - 13.000

Estimated Facts


Calculated Effective Temperature4,014 Kelvin

Sources and Links


SIMBAD SourceLink

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