A-type star · white star

HR 4340

HR 4340 is a white star in the constellation Ursa Major 296 ly from Earth. Its surface is about 8,775 K, about 1.5 times the Sun's surface temperature, and it shines at 19.75× the Sun's brightness. At magnitude 6.4 it is within reach of 50 mm binoculars; the light you see left it 296 years ago.

296 lybrightness mag 6.40A3V

Also catalogued as HD 97138 · HIP 54721

8,775 K

temperature

6.40

apparent magnitude

19.75× ☉

luminosity vs Sun

A3V

spectral type

Distance & comparison with our Sun

296 years

at light speed from Earth

1.52×

as hot as the Sun

19.75×

the Sun's light output

1.61

absolute magnitude

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HR 4340A-type

Sky regionUrsa Majorthis direction

Nearest stars

Bright stars in Ursa Major

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BINOCULARS NEEDED

Brightness mag 6.4To 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.