The carbon star VY Ursae Majoris is catalogued as an Lb irregular variable. Visual observations indicate that the star is more likely to be a semi-regular variable. Visual observations made in 1990-1993 reveal a clear period of 120 days for the star, with probably long-term changes in mean brightness.
Journal of the British Astronomical Association
- Pub Date:
- February 1995
- VARIABLE STARS: CARBON STARS: VY URSAE MAJORIS