IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg)
Hydra
The Hydra
OriginAncient
AbbreviationHya
GenitiveHydrae
Pronunciation/ˈhaɪdrə/ genitive /ˈhaɪdriː/
HIGH-druh
LocationCelestial Equator
Primary StarAlphard (α Hya)
Right Ascention 9h 28m Declination -8° 40'
Martian Solar Lag δ(🜨→♂) +0.272 h (16.3 min)
Hydra represents the Lernaean Hydra, a reptilian monster so vile that even its breath and blood were highly poisonous. It had nine serpent heads, eight mortal and one immortal. Every time one was cut off two would grow in its place. Defeating the Lernaean Hydra was the second labor assigned to Hercules by King Eurystheus. In the marshes of Lerna, Hercules drew out the Hydra from its lair, and with his mighty club, bashed one of its heads in. In its place, two heads sprouted, just as mean and deadly as the original. He realized he would need to take a different approach. He had his nephew Iolaus quickly cauterize each stump after it was bashed in. This prevented the heads from growing back. Hercules did this with each of the mortal heads. He struck off the immortal head and buried it deep in the ground and placed a huge rock on top of it. With his second labor complete, he dipped the tips of his arrows into the blood of the Hydra, covering them with deadly poison. In a second myth involving Hydra, this constellation represents the snake that Corvus used in a lie to Apollo.
www.underthesky.com
Hydra as depicted by Johann Bayer in his Uranometria (1603). Source image provided by www.RareMaps.com — Barry Lawrence Ruderman Antique Maps Inc. Via www.underthenightsky.com.
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1 Hydra 1240 2 Hydra 1240 3 Hydra 1240 4 Hydra 1240 5 Hydra 1240 6 Hydra 1240 7 Hydra 1240 8 Hydra 1240 9 Hydra 1240 10 Hydra 1240 11 Hydra 1240 12 Hydra 1240 13 Hydra 1240 14 Hydra 1240 15 Hydra 1240 16 Hydra 1240 17 Hydra 1240 18 Hydra 1240 19 Hydra 1240 20 Hydra 1240 21 Hydra 1240 22 Hydra 1240 23 Hydra 1240 24 Hydra 1240 25 Hydra 1240 26 Hydra 1240 27 Hydra 1240 28 Hydra 1240 1 Corvus 1240 15 December 3943 16 December 3943 17 December 3943 18 December 3943 19 December 3943 20 December 3943 21 December 3943 22 December 3943 23 December 3943 24 December 3943 25 December 3943 26 December 3943 27 December 3943 28 December 3943 29 December 3943 30 December 3943 31 December 3943 1 January 3944 2 January 3944 3 January 3944 4 January 3944 5 January 3944 6 January 3944 7 January 3944 8 January 3944 9 January 3944 10 January 3944 11 January 3944 12 January 3944 13 January 3944
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