Zeta Boötis [SEP] constellation
Zeta Boötis
Zeta Boötis, Latinized as ζ Boötis, is a binary star system in the constellation of Boötes that consists of two giant stars with matching stellar classifications of A2III. They have the Flamsteed designation 30 Boötis. This system is approximately 180 light years from Earth and has a combined apparent magnitude of +3.78. The individual magnitudes differ slightly, with component A having a magnitude of 4.43 and component B at the slightly dimmer magnitude 4.83.
The binary nature of this system has been tracked since 1796. They complete
Quadrans Muralis" and shrank the constellation a little in his 1801 "Uranographia" star atlas, to avoid it clashing with neighboring constellations.
In 1922, Quadrans Muralis was omitted when the International Astronomical Union (IAU) formalised its list of officially recognized constellations.
Notable features.
- The variable star BP Boötis was a member of the constellation.
- 39 Boötis is a double star that was transferred by Lalande into Quadrans.
- The Quadrantid meteor shower is still named after the obsolete constellation.