K-type star · orange dwarf
Struve 2398 A
Struve 2398 A is an orange dwarf in the constellation Draco 11.6 ly from Earth. Its surface is about 3,787 K, about 0.7 times the Sun's surface temperature, and it shines at 0.003× the Sun's brightness. At magnitude 8.9 it is within reach of 50 mm binoculars; the light you see left it 12 years ago.
Also catalogued as HD 173739 · HIP 91768 · Gliese Gl 725A
3,787 K
temperature
8.94
apparent magnitude
0.003× ☉
luminosity vs Sun
K5
spectral type
Distance & comparison with our Sun
12 years
at light speed from Earth
0.66×
as hot as the Sun
0.003×
the Sun's light output
11.18
absolute magnitude
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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.