B-type star · blue-white star
121 Tau
121 Tau is a blue-white star in the constellation Taurus 553 ly from Earth. Its surface is about 11,440 K, about 2.0 times the Sun's surface temperature, and it shines at 178× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 553 years ago.
Also catalogued as HR 1875 · HD 36819 · HIP 26248
11,440 K
temperature
5.37
apparent magnitude
178× ☉
luminosity vs Sun
B2.5IV
spectral type
Distance & comparison with our Sun
553 years
at light speed from Earth
1.98×
as hot as the Sun
178×
the Sun's light output
-0.78
absolute magnitude
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VISIBLE TO THE NAKED EYE
Star data from the HYG database v4.2 (Astronexus, CC BY-SA 4.0). Temperature and colour computed by gravityfinder from the B-V colour index; the illustration is generated from that temperature, not a photograph.