M-type star · red
Tianyi
Tianyi is a red in the constellation Draco 741 ly from Earth. Its surface is about 3,695 K, about 0.6 times the Sun's surface temperature, and it shines at 303× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 741 years ago.
Also catalogued as 7 Dra · HR 4863 · HD 111335 · HIP 62423
3,695 K
temperature
5.43
apparent magnitude
303× ☉
luminosity vs Sun
K5III
spectral type
Distance & comparison with our Sun
741 years
at light speed from Earth
0.64×
as hot as the Sun
303×
the Sun's light output
-1.35
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.