B-type star · blue-white star

Thuban

303 lybrightness mag 3.67A0III SB

Also catalogued as 11Alp Dra · HR 5291 · HD 123299 · HIP 68756

10,781 K

temperature

3.67

apparent magnitude

256× ☉

luminosity vs Sun

A0III SB

spectral type

Distance & comparison with our Sun

303 years

at light speed from Earth

1.87×

as hot as the Sun

256×

the Sun's light output

-1.17

absolute magnitude

Explore from here · roam the neighborhood

ThubanB-type

Sky regionDracothis direction

Nearest stars

HR 5227 →38 ly apart
HR 5153 →41 ly apart
HR 5785 →50 ly apart
81 UMa →51 ly apart
84 UMa →54 ly apart
HR 5216 →60 ly apart

Bright stars in Draco

Eltanin →mag 2.2
Athebyne →mag 2.7
Rastaban →mag 2.8
Altais →mag 3.1
Aldhibah →mag 3.2
Edasich →mag 3.3
44Chi Dra →mag 3.5
Grumium →mag 3.7

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 3.7To see it no equipment neededLook toward Draco

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.