M-type star · red
HR 1720
HR 1720 is a red in the constellation Camelopardalis 2,051 ly from Earth. Its surface is about 3,480 K, about 0.6 times the Sun's surface temperature, and it shines at 1,911× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 2,051 years ago.
Also catalogued as HD 34255 · HIP 24914
3,480 K
temperature
5.64
apparent magnitude
1,911× ☉
luminosity vs Sun
K4Iab:
spectral type
Distance & comparison with our Sun
2,051 years
at light speed from Earth
0.60×
as hot as the Sun
1,911×
the Sun's light output
-3.35
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.