K-type star · orange dwarf
Struve 2398 B
Struve 2398 B is an orange dwarf in the constellation Draco 11.3 ly from Earth. Its surface is about 3,704 K, about 0.6 times the Sun's surface temperature, and it shines at 0.001× the Sun's brightness. At magnitude 9.7 it is within reach of 4-6" (100-150 mm) telescope; the light you see left it 11 years ago.
Also catalogued as HD 173740 · HIP 91772 · Gliese Gl 725B
3,704 K
temperature
9.70
apparent magnitude
0.001× ☉
luminosity vs Sun
K5
spectral type
Distance & comparison with our Sun
11 years
at light speed from Earth
0.64×
as hot as the Sun
0.001×
the Sun's light output
12.01
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.