Canis Major
- Abbreviation:
- CMa
- Genitive:
- Canis Majoris
- Translation:
- The Greater Dog
- Right Ascention:
- 7h 0m
- Declination:
- -20°
Orion the Hunter's principal hunting companion. Its brightest star, Sirius, is the brightest star in the nighttime sky. Its location in the morning sky in midsummer was also the indicator in ancient Egypt of the annual time for the Nile River to flood its banks.