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 -364→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -364 2 Hydra -364 3 Hydra -364 4 Hydra -364 5 Hydra -364 6 Hydra -364 7 Hydra -364 8 Hydra -364 9 Hydra -364 10 Hydra -364 11 Hydra -364 12 Hydra -364 13 Hydra -364 14 Hydra -364 15 Hydra -364 16 Hydra -364 17 Hydra -364 18 Hydra -364 19 Hydra -364 20 Hydra -364 21 Hydra -364 22 Hydra -364 23 Hydra -364 24 Hydra -364 25 Hydra -364 26 Hydra -364 27 Hydra -364 28 Hydra -364 2 Centaurus -363 16 April 0926 17 April 0926 18 April 0926 19 April 0926 20 April 0926 21 April 0926 22 April 0926 23 April 0926 24 April 0926 25 April 0926 26 April 0926 27 April 0926 28 April 0926 29 April 0926 30 April 0926 1 May 0926 2 May 0926 3 May 0926 4 May 0926 5 May 0926 6 May 0926 7 May 0926 8 May 0926 9 May 0926 10 May 0926 11 May 0926 12 May 0926 13 May 0926
MS -390725 MS -390726 MS -390727 MS -390728 MS -390729 MS -390730 MS -390731 MS -390732 MS -390733 MS -390734 MS -390735 MS -390736 MS -390737 MS -390738 MS -390739 MS -390740 MS -390741 MS -390742 MS -390743 MS -390744 MS -390745 MS -390746 MS -390747 MS -390748 MS -390749 MS -390750 MS -390751 MS -390752 MS -390698 MD -401588 MD -401587 MD -401586 MD -401585 MD -401584 MD -401583 MD -401582 MD -401581 MD -401580 MD -401579 MD -401578 MD -401577 MD -401576 MD -401575 MD -401574 MD -401573 MD -401572 MD -401571 MD -401570 MD -401569 MD -401568 MD -401567 MD -401566 MD -401565 MD -401564 MD -401563 MD -401562 MD -401561