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.
←Hydra 29→
SolPhoDeiTerVenJovSat
12
3456789
10111213141516
17181920212223
2425262728
1 Hydra 29 2 Hydra 29 3 Hydra 29 4 Hydra 29 5 Hydra 29 6 Hydra 29 7 Hydra 29 8 Hydra 29 9 Hydra 29 10 Hydra 29 11 Hydra 29 12 Hydra 29 13 Hydra 29 14 Hydra 29 15 Hydra 29 16 Hydra 29 17 Hydra 29 18 Hydra 29 19 Hydra 29 20 Hydra 29 21 Hydra 29 22 Hydra 29 23 Hydra 29 24 Hydra 29 25 Hydra 29 26 Hydra 29 27 Hydra 29 28 Hydra 29 1 Corvus 29 5 August 1665 6 August 1665 7 August 1665 8 August 1665 9 August 1665 10 August 1665 11 August 1665 12 August 1665 13 August 1665 14 August 1665 15 August 1665 16 August 1665 17 August 1665 18 August 1665 19 August 1665 20 August 1665 21 August 1665 22 August 1665 23 August 1665 24 August 1665 25 August 1665 26 August 1665 27 August 1665 28 August 1665 29 August 1665 30 August 1665 31 August 1665 1 September 1665 2 September 1665
MS -127997 MS -127996 MS -127995 MS -127994 MS -127993 MS -127992 MS -127991 MS -127990 MS -127989 MS -127988 MS -127987 MS -127986 MS -127985 MS -127984 MS -127983 MS -127982 MS -127981 MS -127980 MS -127979 MS -127978 MS -127977 MS -127976 MS -127975 MS -127974 MS -127973 MS -127972 MS -127971 MS -127970 MS -127969 MD -131562 MD -131561 MD -131560 MD -131559 MD -131558 MD -131557 MD -131556 MD -131555 MD -131554 MD -131553 MD -131552 MD -131551 MD -131550 MD -131549 MD -131548 MD -131547 MD -131546 MD -131545 MD -131544 MD -131543 MD -131542 MD -131541 MD -131540 MD -131539 MD -131538 MD -131537 MD -131536 MD -131535 MD -131534