Long-term visual magnitude estimates of the Mira variable χ Cygni. I. 1686-1900
Abstract
We present 4314 V magnitudes of the Mira variable χ Cygni obtained between the variable's discovery date in 1686 and the beginning of the present century. The estimates were made by 25 different observers, including Kirch (the discoverer of χ Cyg as a variable), Cassini, Halley, Olbers and Argelander. All magnitudes are given on the Johnson V scale. A consistent cycle-count scheme for the complete time interval is given.
- Publication:
-
Journal of Astronomical Data
- Pub Date:
- December 1998
- Bibcode:
- 1998JAD.....4....7S