Universe Guide

120 Tauri - HD36576 - HIP26064

120 Tauri is a blue eruptive subgiant star that can be located in the constellation of Taurus. HIP26064 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD36576. 120 Tauri has alternative name(s), 120 Tauri , V960_Tau, 120 Tau.

Location of 120 Tauri

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 120 Tauri, the location is 05h 33m 31.63 and +18 d 32 ` 24.8 .

Proper Motion of 120 Tauri

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 000.00 ± 000.00 towards the north and 003.00 ± 000.00 east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 120 Tauri

120 Tauri has a spectral type of B2IV-Ve. This means the star is a blue coloured subgiant star. The star has a B-V Colour Index of -0.02 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 9,839 Kelvin.

120 Tauri has been calculated as 11.78 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 8,194,332.73.km.

120 Tauri Apparent and Absolute Magnitudes

120 Tauri has an apparent magnitude of 5.67 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 -2.82 If you used the 2007 Parallax value, you would get an absolute magnitude of -2.82. 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 120 Tauri

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.00 which gave the calculated distance to 120 Tauri as 1630.82 light years away from Earth or 500 parsecs. In 2007, Hipparcos data was revised with a new parallax of 2.00 which put 120 Tauri at a distance of 1630.82 light years or 500 parsecs.

It would take a spaceship travelling at the speed of light, 1630.82 years using the 1997 distance to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of 120 Tauri

The star is a eruptive Gamma Cassiopeiae 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. 120 Tauri brightness ranges from a magnitude of 6.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 1.0 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 Stellar Age, Metallicity or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

120 Tauri Facts


Traditional Name120 Tauri
Short NameV960 Tau, 120 Tau
Alternative Name(s)120 Tauri
Hipparcos Library I.D.26064
Bonner DurchmusterungBD+18 877
Henry Draper Designation36576
Celestial TypeStar
Absolute Magnitude-2.82 / -2.82
Apparent Magnitude5.67
Right Ascension (R.A.)05h 33m 31.63
Declination (Dec.)+18 d 32 ` 24.8
1997 Distance from Earth2.00 Parallax (milliarcseconds)
 1630.82 Light Years
 500 Parsecs
2007 Distance from Earth2.00 Parallax (milliarcseconds)
 1630.82 Light Years
 500 Parsecs
Proper Motion Dec.0.00 ± 0.00 milliarcseconds/year
Proper Motion RA.3.00 ± 0.00 milliarcseconds/year
B-V Index-0.02
Spectral TypeB2IV-Ve
Colour(B) blue
Star Typesubgiant star
Variable Star ClassEruptive
Variable Star TypeGamma Cassiopeiae
Mean Variability Period in Days1.000
Radius (x the Sun)11.78
Calculated Effective Temperature9,839 Kelvin


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