Pi Sagittarii [SEP] constellation
Pi Sagittarii
Pi Sagittarii (π Sagittarii, abbreviated Pi Sgr, π Sgr) is a triple star system in the zodiac constellation of Sagittarius. It has an apparent visual magnitude of +2.89, bright enough to be readily seen with the naked eye. Based upon parallax measurements, it is roughly from the Sun.
The three components are designated Pi Sagittarii A (officially named Albaldah , from the traditional name of the entire system), B and C.
Nomenclature.
"π Sagittarii" (
meaning 'the brightest of the town'.
This system, together with Zeta Sagittarii and Sigma Sagittarii may have been the Akkadian "Gu-shi-rab‑ba", 'the Yoke of the Sea'.
In Chinese, (), meaning "Establishment", refers to an asterism consisting of Pi Sagittarii, Xi² Sagittarii, Omicron Sagittarii, 43 Sagittarii, Ro¹ Sagittarii and Upsilon Sagittarii. Consequently,the Chinese name for Pi Sagittarii itself is (, .)
Properties.
The spectrum of the system