- Source: HD 128333
HD 128333 or CH Boötis is an irregular variable star in the northern constellation of Boötes.
With an apparent magnitude of 5.7, it is faintly visibly to the naked eye under good observing conditions.
The variability of the brightness of HD 128333 was announced by Joel Stebbins and Charles Morse Huffer in 1928, based on observations made at Washburn Observatory. It was given its variable star designation, CH Boötis, in 1977.
It is currently on the asymptotic giant branch of the HR diagram.
References
External links
HR 5452 VizieR Bright Star Catalog entry
Image HD 128333