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HIP 25413

HIP 25413 is a blue to white eruptive variable star that can be located in the constellation of Taurus. 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.

HIP 25413's Alternative Names

HIP25413 is the reference name for the star in the Hipparcos Star Catalogue.

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

Location of HIP 25413

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 HIP 25413, the location is 05h 26m 06.74 and +22° 49` 18.6 .

Physical Properties (Colour, Temperature) of HIP 25413

HIP 25413 has a spectral type of F8. This means the star is a blue to white variable star. The star has a B-V Colour Index of 0.55 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,992 Kelvin.

HIP 25413 Radius has been calculated as being 3.50 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,433,463.75.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.

HIP 25413 Apparent and Absolute Magnitudes

HIP 25413 has an apparent magnitude of 10.27 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 1.97 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 HIP 25413

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.19 which gave the calculated distance to HIP 25413 as 1489.33 light years away from Earth or 456.62 parsecs. It would take a spaceship travelling at the speed of light, 1489.33 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of HIP 25413

The star is a eruptive Irregular 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. HIP 25413 brightness ranges from a magnitude of 10.480 to a magnitude of 10.010 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.6 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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HIP 25413 Facts

Visual Facts


 HIP 25413
Alternative NamesHIP 25413
Spectral TypeF8
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour blue to white
GalaxyMilky Way
ConstellationTaurus
Absolute Magnitude1.97
Visual / Apparent Magnitude10.27
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)05h 26m 06.74
Declination (Dec.)+22° 49` 18.6
Galactic Latitude-6.98 degrees
Galactic Longitude182.81 degrees
Distance from Earth2.19 Parallax (milliarcseconds)
 1489.33 Light Years
 456.62 Parsecs
B-V Index0.55
Radial Velocity18.00 ± 2.70 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassEruptive
Variable Star TypeIrregular
Mean Variability Period in Days0.638
Variable Magnitude Range (Brighter - Dimmer)10.010 - 10.480

Estimated Facts


Calculated Effective Temperature5,992 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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