Beta Sagittarii

Starbox short
name=β¹ Sagittarii
epoch=J2000.0
constell=Sagittarius
ra=19^h 22^m 38.3^s
dec=-44° 27' 32"
spectral=B9V
appmag_v=+3.96
dist_ly=378 ± 42
dist_pc=116 ± 13
names=Arkab Prior, HR 7337,
HD 181454, SAO 229646,
HIP 95241, CCDM 19226-4428The Bayer designation Beta Sagittarii (β Sgr / β Sagittarii) is shared by two star systems, β¹ Sagittarii and β² Sagittarii, in the constellation Sagittarius. The two stars are separated by 0.36° on the sky. Beta Sagittarii also has the traditional name Arkab, from the Arabic عرقوب "^carqūb" meaning "hamstring".

β¹ Sagittarii

Beta-1 Sagittarii, also called Arkab Prior since it leads β² across the sky, is a binary star lying 378 light years from Earth. Arkab Prior A is a spectral type B9 main sequence dwarf which has an apparent magnitude of +3.96. Arkab Prior B is a type A3 dwarf with an apparent magnitude of +7.4. The two stars have a separation on the sky of 28 arcseconds, which puts them at least 3300 Astronomical Units apart.

β² Sagittarii

Starbox short
name=β² Sagittarii
epoch=J2000.0
constell=Sagittarius
ra=19^h 23^m 13.2^s
dec=-44° 47' 59"
spectral=F2III
appmag_v=+4.27
dist_ly=139 ± 5
dist_pc=43 ± 2
names=Arkab Posterior, HR 7343,
HD 181623, SAO 229654,
HIP 95294

Beta-2 Sagittarii, also called Arkab Posterior since it trails β¹ across the sky, is a spectral type F2 giant which has an apparent magnitude of +4.27. It is 137 light years from Earth.