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 -280→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -280 2 Hydra -280 3 Hydra -280 4 Hydra -280 5 Hydra -280 6 Hydra -280 7 Hydra -280 8 Hydra -280 9 Hydra -280 10 Hydra -280 11 Hydra -280 12 Hydra -280 13 Hydra -280 14 Hydra -280 15 Hydra -280 16 Hydra -280 17 Hydra -280 18 Hydra -280 19 Hydra -280 20 Hydra -280 21 Hydra -280 22 Hydra -280 23 Hydra -280 24 Hydra -280 25 Hydra -280 26 Hydra -280 27 Hydra -280 28 Hydra -280 3 Centaurus -279 28 April 1084 29 April 1084 30 April 1084 1 May 1084 2 May 1084 3 May 1084 4 May 1084 5 May 1084 6 May 1084 7 May 1084 8 May 1084 9 May 1084 10 May 1084 11 May 1084 12 May 1084 13 May 1084 14 May 1084 15 May 1084 16 May 1084 17 May 1084 18 May 1084 19 May 1084 20 May 1084 21 May 1084 22 May 1084 23 May 1084 24 May 1084 25 May 1084
MS -334564 MS -334565 MS -334566 MS -334567 MS -334568 MS -334569 MS -334570 MS -334571 MS -334572 MS -334573 MS -334574 MS -334575 MS -334576 MS -334577 MS -334578 MS -334579 MS -334580 MS -334581 MS -334582 MS -334583 MS -334584 MS -334585 MS -334586 MS -334587 MS -334588 MS -334589 MS -334590 MS -334591 MS -334537 MD -343867 MD -343866 MD -343865 MD -343864 MD -343863 MD -343862 MD -343861 MD -343860 MD -343859 MD -343858 MD -343857 MD -343856 MD -343855 MD -343854 MD -343853 MD -343852 MD -343851 MD -343850 MD -343849 MD -343848 MD -343847 MD -343846 MD -343845 MD -343844 MD -343843 MD -343842 MD -343841 MD -343840