A-type star · white star

Theta Cep

Theta Cep is a white star in the constellation Cepheus 136 ly from Earth. Its surface is about 8,171 K, about 1.4 times the Sun's surface temperature, and it shines at 31.56× the Sun's brightness. At magnitude 4.2 it is bright enough to see with the naked eye; the light you see left it 136 years ago.

136 lybrightness mag 4.21A7III

Also catalogued as HR 7850 · HD 195725 · HIP 101093

8,171 K

temperature

4.21

apparent magnitude

31.56× ☉

luminosity vs Sun

A7III

spectral type

Distance & comparison with our Sun

136 years

at light speed from Earth

1.42×

as hot as the Sun

31.56×

the Sun's light output

1.10

absolute magnitude

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Theta CepA-type

Sky regionCepheusthis direction

Nearest stars

Bright stars in Cepheus

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 4.2To see it no equipment neededLook toward Cepheus

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.