The Crab

Abbreviation: Cnc
Genitive: Cancri

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Cancer is a member of the zodiac. This is one of the most ancient of constellations, harking back to Babylonia where it was known as either a crab or snapping turtle. The ancient Egyptians associated it with the scarab beetle, the sacred emblem of immortality. The ancient Greeks thought it represented the crab that Heracles stepped on during his fight with the Hydra.

Notable Features

Designation Name Description
α Cnc Acubens
γ Cnc Assellus Borealis
δ Cnc Assellus Australis
ε Cnc Meleph
ζ1 Cnc Tegmine Tegmine is the brightest component of a multiple star. A small telescope will show two objects but the brighter one is actually a binary.
ρ1 Cnc Copernicus Also known as 55 Cnc, this star possesses five known exoplanets.
DX Cnc This is a nearby neighbour of the Sun. Lying at a distance of nearly 12 light years, it shines at a feeble fifteenth magnitude. It is found on the sky map near φ2 Cnc.
M44 The Beehive, Praesepe This open star cluster is over 500 light years away. Because it is located so near to the ecliptic, solar system objects often pass near or through it, affording excellent photographic opportunities.
M67 Few open star clusters are older than this one. Binoculars are necessary to see this sixth magnitude object.
C48 A medium-size telescope will be necessary to view this spiral galaxy. Long-exposure photographs reveal multiple spiral arms around the central bulge.