B-type star · blue-white star

HR 1840

HR 1840 is a blue-white star in the constellation Orion 2,381 ly from Earth. Its surface is about 13,442 K, about 2.3 times the Sun's surface temperature, and it shines at 1,363× the Sun's brightness. At magnitude 6.3 it is within reach of 50 mm binoculars; the light you see left it 2,381 years ago.

2,381 lybrightness mag 6.33B2IV-V

Also catalogued as HD 36285 · HIP 25786

13,442 K
temperature
6.33
apparent magnitude
1,363× ☉
luminosity vs Sun
B2IV-V
spectral type
Distance & comparison with our Sun
2,381 years
at light speed from Earth
2.33×
as hot as the Sun
1,363×
the Sun's light output
-2.99
absolute magnitude
Explore from here · roam the neighborhood
HR 1840B-type
Sky regionOrionthis direction
StarHR 184860 ly
StarHatysa96 ly
StarHR 1886330 ly
StarTabitstar
StarEta Oristar
Nearest stars
Bright stars in Orion
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 6.3To see it 50 mm binocularsLook toward Orion

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.