Cerberus is an obsolete constellation created by Hevelius in 1690, whose stars are now included in the constellation Hercules.

Constellation Cerberus consisted of the four stars 93, 95, 102, and 109 Herculi. ^[1] It represents the three-headed monster that guarded the gates of Hades and was brought to the upper world by Hercules. The figure depicts it as held by Hercules, in which the constellation is now merged. According to some accounts, it is the serpent slain by Hero that infested the country around Taenarum. ^[2]

Constellation Cerberus Stars

2000	B	Star	Mag	Orb
00 ♑ 00	93	93 Her	4.67	1°00′
00 ♑ 29	95	95 Her	4.26	1°00′
02 ♑ 50	102	102 Her	4.37	1°00′
07 ♑ 47	109	109 Her	3.88	1°10′

Constellation Cerberus Astrology

Constellation Cerberus is said to cause faithfulness, devotion, industry and watchfulness, and to restrain from evil, but to give danger of poison. ^[2]

References

1. Star Tales – Cerberus, Ian Redpath
2. Fixed Stars and Constellations in Astrology, Vivian E. Robson, 1923, p.38.