K-type star · orange

HR 644

HR 644 is an orange in the constellation Aries 746 ly from Earth. Its surface is about 4,007 K, about 0.7 times the Sun's surface temperature, and it shines at 188× the Sun's brightness. At magnitude 6.0 it is bright enough to see with the naked eye; the light you see left it 746 years ago.

746 lybrightness mag 5.96K0

Also catalogued as HD 13522 · HIP 10296

4,007 K
temperature
5.96
apparent magnitude
188× ☉
luminosity vs Sun
K0
spectral type
Distance & comparison with our Sun
746 years
at light speed from Earth
0.69×
as hot as the Sun
188×
the Sun's light output
-0.84
absolute magnitude
Explore from here · roam the neighborhood
HR 644K-type
Sky regionAriesthis direction
Star16 Ari32 ly
Star11 Ari130 ly
StarPi Ari150 ly
StarHamalstar
StarSheratanstar
Nearest stars
Bright stars in Aries
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 6.0To see it no equipment neededLook toward Aries

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.