Omicron Sagittarii [SEP] constellation
Omicron Sagittarii
Omicron Sagittarii (Omicron Sgr, ο Sagittarii, ο Sgr) is a binary star in the constellation Sagittarius. ο Sagittarii is 142 light years from Earth and is a spectral type K0 orange giant with an apparent magnitude of +3.77. It has a faint, 13th magnitude companion, ο Sagittarii B, 36 arc seconds away.
It is 0.86 degree north of the ecliptic, so ο Sagittarii can be occulted by the Moon and very rarely by planets. The last occultation by a planet took
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