Universe Guide

121 Tauri - HD36819 - HIP26248

121 Tauri is a blue subgiant star that can be located in the constellation of Taurus. HIP is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD.

Location of 121 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 from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 121 Tauri, the location is 05h 35m 27.12 and +24 d 02 ` 22.7 .

Physical Properties/View of 121 Tauri

121 Tauri has a spectral type of B2.5IV. This means the star is (B) blue coloured (IV) subgiant. 121 Tauri lies at a distance of 599.56 light years away from our Sun and our planet Earth or to put it another way, 183.65 parsecs away from the Sun.

121 Tauri has an apparent magnitude of 5.37 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 121 Tauri has an absolute magnitude of -0.95 which is the apparent magnitude of an object if it were 32.6 light years away or 10 parsecs from Earth. 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. The stars temperature has been calculated at between 10000 and 30000 based on the Class Type and lookup at Wikipedia-Stellar Classification

Source of Information

The source of the information came 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.

121 Tauri Facts


Traditional Name121 Tauri
Hipparcos Library I.D.26248
Henry Draper Designation36819
Celestial TypeStar
Absolute Magnitude-0.95
Apparent Magnitude5.37
Right Ascension (R.A.)05h 35m 27.12
Declination (Dec.)+24 d 02 ` 22.7
Distance from the Sun / Earth599.56 Light Years
Spectral TypeB2.5IV
Colour (B) blue
Star Type (VI) subdwarf star.
Variable Star ClassConstant, non-variable
Calculated Temperature Range10,000.00 - 30,000.00


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