M-type star · red

HR 6643

565 lybrightness mag 5.94M2III

Also catalogued as HD 162189 · HIP 87390

3,688 K

temperature

5.94

apparent magnitude

110× ☉

luminosity vs Sun

M2III

spectral type

Distance & comparison with our Sun

565 years

at light speed from Earth

0.64×

as hot as the Sun

110×

the Sun's light output

-0.25

absolute magnitude

Explore from here · roam the neighborhood

HR 6643M-type

Sky regionScorpiusthis direction

Nearest stars

Shaula →51 ly apart
Lesath →54 ly apart
HR 6870 →73 ly apart
HR 6778 →75 ly apart
HR 6678 →77 ly apart
The CrA →79 ly apart

Bright stars in Scorpius

Shaula →mag 1.6
Sargas →mag 1.9
Dschubba →mag 2.3
Larawag →mag 2.3
Kap Sco →mag 2.4
Acrab →mag 2.6
Lesath →mag 2.7
Paikauhale →mag 2.8

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 5.9To see it no equipment neededLook toward Scorpius

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.