V420 Aurigae is a blue eruptive subgiant star that can be located in the constellation of Auriga. The star can not be seen by the naked eye, you need a telescope to see it.
HIP25114 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD34921.
V420 Aurigae has alternative name(s), V420 Aur.
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 V420 Aurigae, the location is 05h 22m 35.23 and +37d40`33.7 .
V420 Aurigae has a spectral type of B0IVpe. This means the star is a blue subgiant star. The star has a B-V Colour Index of 0.18 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,889 Kelvin.
V420 Aurigae Radius has been calculated as being 42.36 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 29,470,633.49.km. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.
V420 Aurigae has an apparent magnitude of 7.40 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 -4.64 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.39 which gave the calculated distance to V420 Aurigae as 8363.16 light years away from Earth or 2564.10 parsecs. It would take a spaceship travelling at the speed of light, 8363.16 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
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. V420 Aurigae brightness ranges from a magnitude of 7.535 to a magnitude of 7.424 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.1 days (variability).
|Traditional/Proper Name||V420 Aurigae|
|Short Name||V420 Aur|
|Hipparcos Library I.D.||25114|
|Bonner Durchmusterung||BD+37 1160|
|Henry Draper Designation||34921|
|Star Type||subgiant star|
|Visual / Apparent Magnitude||7.40|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||05h 22m 35.23|
|Galactic Latitude||0.71 degrees|
|Galactic Longitude||170.05 degrees|
|1997 Distance from Earth||0.39 Parallax (milliarcseconds)|
|8363.16 Light Years|
|Radial Velocity||-20.50 ± 4.40 km/s|
|Variable Star Class||Eruptive|
|Variable Star Type||Irregular|
|Mean Variability Period in Days||0.103|
|Variable Magnitude Range (Brighter - Dimmer)||7.424 - 7.535|
|Calculated Effective Temperature||7,889 Kelvin|