F-type star · yellow-white star

HR 3747

HR 3747 is a yellow-white star in the constellation Ursa Major 137 ly from Earth. Its surface is about 6,912 K, about 1.2 times the Sun's surface temperature, and it shines at 3.87× the Sun's brightness. At magnitude 6.5 it is within reach of 50 mm binoculars; the light you see left it 137 years ago.

137 lybrightness mag 6.50F3Vs

Also catalogued as HD 81790 · HIP 46566

6,912 K

temperature

6.50

apparent magnitude

3.87× ☉

luminosity vs Sun

F3Vs

spectral type

Distance & comparison with our Sun

137 years

at light speed from Earth

1.20×

as hot as the Sun

3.87×

the Sun's light output

3.38

absolute magnitude

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HR 3747F-type

Sky regionUrsa Majorthis direction

Nearest stars

Bright stars in Ursa Major

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BINOCULARS NEEDED

Brightness mag 6.5To see it 50 mm binocularsLook toward Ursa Major

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.