Delta Boötis [SEP] constellation
Delta Boötis
Delta Boötis (δ Boo, δ Boötis) is a double star in the northern constellation Boötes. Based upon parallax measurements, it is located at a distance of approximately from the Earth. This star is sometimes called Princeps , meaning "prince" or "prime" in Latin. The origin of this name is unclear, although it usually appears in an astrological context. The apparent visual magnitude of this star is 3.5, making it visible to the naked eye even during a Full Moon.
In Chinese
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.