Note 16 — VI END OF THE SUN—ORIGIN OF NEBULÆ
H. Borns translation
This figure, -1.7, signifies that the brightness of Sirius is 2.522.7 = 12 times greater than that of a star of magnitude 1. Next to Sirius comes Canopus, with magnitude -1.0, being 6.3 times brighter than a star of magnitude 1.