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WZ Arietis, HD19485, HIP14610

WZ Arietis is a white to yellow main sequence dwarf star that can be located in the constellation of Aries. The description is based on the spectral class. WZ Arietis is not part of the constellation but is within the borders of the constellation.

The star can not be seen by the naked eye, you need a telescope to see it. The star has an estimated age of 7.60 Billion of Years but could be as young as 6.10 to 8.80 according to Hipparcos.

WZ Arietis's Alternative Names

HIP14610 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD19485.

WZ Arietis has alternative name(s) :- , WZ Ari.

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+25 497.

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

Location of WZ Arietis

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 WZ Arietis, the location is 03h 08m 40.69 and +25° 35` 30.8 .

Radial Velocity and Proper Motion of WZ Arietis

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 -27.78 ± 0.70 miliarcseconds/year towards the north and 14.22 ± 0.88 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 the Sun is 8.50 km/s with an error of about 0.06 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.

WZ Arietis 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 3.33 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, Age) of WZ Arietis

WZ Arietis has a spectral type of G5V.... This means the star is a white to yellow main sequence dwarf star. The star is 7,467.00 Parsecs from the Galactic Centre or terms of Light Years is 24,354.62 s. The star has a B-V Colour Index of 0.7 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,563 Kelvin.

WZ Arietis Radius has been calculated as being 1.78 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,238,034.64.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 1.89. 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 0.26 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 7.60 Billion years old but could be between 6.10 and 8.80 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

WZ Arietis Apparent and Absolute Magnitudes

WZ Arietis has an apparent magnitude of 8.21 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 3.76 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.63. 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 WZ Arietis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 12.90 which gave the calculated distance to WZ Arietis as 252.84 light years away from Earth or 77.52 parsecs. It would take a spaceship travelling at the speed of light, 252.84 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 12.16 which put WZ Arietis at a distance of 268.23 light years or 82.24 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 16,963,099.47 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 7,467.00 Parsecs or 24,354.62 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. WZ Arietis brightness ranges from a magnitude of 8.362 to a magnitude of 8.328 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 6.6 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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WZ Arietis Facts

Visual Facts


Primary / Proper / Traditional NameWZ Arietis
Alternative NamesHD 19485, HIP 14610, BD+25 497, WZ Ari
Spectral TypeG5V...
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type main sequence Dwarf Star
Colour white to yellow
GalaxyMilky Way
ConstellationAries
Age7.60 Billion Years Old
Age Range6.10 - 8.80 Billion Years Old
Absolute Magnitude 3.76 / 3.63
Visual / Apparent Magnitude8.21
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)03h 08m 40.69
Declination (Dec.)+25° 35` 30.8
Galactic Latitude-27.78 degrees
Galactic Longitude158.00 degrees
1997 Distance from Earth12.90 Parallax (milliarcseconds)
 252.84 Light Years
 77.52 Parsecs
2007 Distance from Earth12.16 Parallax (milliarcseconds)
 268.23 Light Years
 82.24 Parsecs
 16,963,099.47 Astronomical Units
Galacto-Centric Distance24,354.62 Light Years / 7,467.00 Parsecs
Proper Motion Dec.-27.78 ± 0.70 milliarcseconds/year
Proper Motion RA. 14.22 ± 0.88 milliarcseconds/year
B-V Index0.70
Radial Velocity8.50 ± 0.06 km/s
Iron Abundance0.26 ± 9.99 Fe/H
Eccentricity0.08
Semi-Major Axis8027.00
Stellar Luminosity (Lsun)3.33

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days6.587
Variable Magnitude Range (Brighter - Dimmer)8.328 - 8.362

Estimated Facts


Calculated Effective Temperature5,563 Kelvin

Sources and Links


SIMBAD SourceLink

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