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 -367→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -367 2 Hydra -367 3 Hydra -367 4 Hydra -367 5 Hydra -367 6 Hydra -367 7 Hydra -367 8 Hydra -367 9 Hydra -367 10 Hydra -367 11 Hydra -367 12 Hydra -367 13 Hydra -367 14 Hydra -367 15 Hydra -367 16 Hydra -367 17 Hydra -367 18 Hydra -367 19 Hydra -367 20 Hydra -367 21 Hydra -367 22 Hydra -367 23 Hydra -367 24 Hydra -367 25 Hydra -367 26 Hydra -367 27 Hydra -367 28 Hydra -367 2 Centaurus -366 23 August 0920 24 August 0920 25 August 0920 26 August 0920 27 August 0920 28 August 0920 29 August 0920 30 August 0920 31 August 0920 1 September 0920 2 September 0920 3 September 0920 4 September 0920 5 September 0920 6 September 0920 7 September 0920 8 September 0920 9 September 0920 10 September 0920 11 September 0920 12 September 0920 13 September 0920 14 September 0920 15 September 0920 16 September 0920 17 September 0920 18 September 0920 19 September 0920 20 September 0920
MS -392731 MS -392732 MS -392733 MS -392734 MS -392735 MS -392736 MS -392737 MS -392738 MS -392739 MS -392740 MS -392741 MS -392742 MS -392743 MS -392744 MS -392745 MS -392746 MS -392747 MS -392748 MS -392749 MS -392750 MS -392751 MS -392752 MS -392753 MS -392754 MS -392755 MS -392756 MS -392757 MS -392758 MS -392704 MD -403650 MD -403649 MD -403648 MD -403647 MD -403646 MD -403645 MD -403644 MD -403643 MD -403642 MD -403641 MD -403640 MD -403639 MD -403638 MD -403637 MD -403636 MD -403635 MD -403634 MD -403633 MD -403632 MD -403631 MD -403630 MD -403629 MD -403628 MD -403627 MD -403626 MD -403625 MD -403624 MD -403623 MD -403622