The Journal of the Royal Astronomical Society of Canada 1922-11: Vol 16 Iss 8 (1922)
Royal Astronomical Society of Canada · leaf 26
| Algol: How to Observe its Light- Variations 303 H.C.O., Vol. 50. Additional stars which may be used for the purpose of comparison are: Alpha Cassiopeiae....... 2.47 Zeta Cassiopeiae........ 3.72 Beta 2.42 Eta 3.64 Gamma 2.25 Delta ” 2.80 Alpha Andromedae...... 2.15 Epsilon 3.44 Beta 2.37 … Rho Persei
Astronomy · Scholarly Journals · Microfilm
Internet Archive · Public domain (published before 1931). Free to use for anything.