B-type star · blue-white star

Theta Cir

Theta Cir is a blue-white star in the constellation Circinus 1,510 ly from Earth. Its surface is about 10,422 K, about 1.8 times the Sun's surface temperature, and it shines at 1,735× the Sun's brightness. At magnitude 5.1 it is bright enough to see with the naked eye; the light you see left it 1,510 years ago.

1,510 lybrightness mag 5.08B4Vnp

Also catalogued as HR 5551 · HD 131492 · HIP 73129

10,422 K
temperature
5.08
apparent magnitude
1,735× ☉
luminosity vs Sun
B4Vnp
spectral type
Distance & comparison with our Sun
1,510 years
at light speed from Earth
1.81×
as hot as the Sun
1,735×
the Sun's light output
-3.25
absolute magnitude
Explore from here · roam the neighborhood
Theta CirB-type
Sky regionCircinusthis direction
StarHR 5527140 ly
StarHR 5500140 ly
StarHR 5836170 ly
StarXamistar
StarBeta Cirstar
Nearest stars
Bright stars in Circinus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.1To see it no equipment neededLook toward Circinus

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.