γ Cygni (Latinised to Gamma Cygni) is the star's Bayer designation. WDS J20222+4015A is its designation in the Washington Double Star Catalog. It bore the traditional name Sadr (also rendered Sadir / ˈseɪdər / or Sador), derived from the Arabic صدر ṣadr "chest", the same word which gave rise to the star Schedar (Alpha Cassiopeiae).

The Sadr Region (also known as IC 1318 or the Gamma Cygni Nebula) is the diffuse emission nebula surrounding Sadr (γ Cygni) at the center of Cygnus's cross. The Sadr Region is one of the surrounding nebulous regions; others include the Butterfly Nebula and the Crescent Nebula.

2019年10月20日 · Sadr, Gamma Cygni (γ Cyg) is a yellow-white supergiant star located in the constellation Cygnus. With an apparent magnitude of 2.23, it is the constellation’s second brightest star, after Deneb. Sadr lies at an approximate distance of 1,800 light years from Earth.

Sadr, also designated as γ Cygni (gamma Cygni), is a variable and multiple supergiant star of spectral class F8 in the constellation of Cygnus. Sadr visual magnitude is 2.2, making it the 63th brightest star in the sky.

2020年7月14日 · Sadr, designated as Gamma Cygni, is a star located in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross. Sadr is the second brightest star in the constellation of Cygnus, after Deneb. This star is also among the brightest stars in the night sky.

2018年12月31日 · The Gamma Cygni Nebula, also known as the Sadr Region or IC 1318, is a diffuse emission nebula that can be seen around Sadr (Gamma Cygni), the star at the center of the Northern Cross, which marks the heart of Cygnus, the Swan. Despite the name, the star and the nebula are unrelated.

Mid-second magnitude (2.20), Sadr (though second brightest) is the Gamma star of the constellation Cygnus, the Swan, and lies prominently at the center of Cygnus's famed asterism, the Northern Cross, at the crossing point of the staff and bar.

The Sadr Region (also known as IC 1318 or the Gamma Cygni Nebula) is the diffuse emission nebula at the center of Cygnus's cross. Sadr is the white supergiant star at the center of this image. It is Cygnus’ second brightest star (Deneb is the brightest), and lies approximately 1,800 light-years from Earth.

Gamma Cygni, officially named Sadr, is a star in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross. Based upon parallax measurements...

2013年7月9日 · Explanation: Supergiant star Gamma Cygni lies at the center of the Northern Cross, a famous asterism in the constellation of the Swan (Cygnus). Known by the proper name Sadr, the bright star also lies at the center of this gorgeous skyscape, featuring a complex of stars, dust clouds, and glowing nebulae along the plane of our Milky Way galaxy.