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 -407→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -407 2 Hydra -407 3 Hydra -407 4 Hydra -407 5 Hydra -407 6 Hydra -407 7 Hydra -407 8 Hydra -407 9 Hydra -407 10 Hydra -407 11 Hydra -407 12 Hydra -407 13 Hydra -407 14 Hydra -407 15 Hydra -407 16 Hydra -407 17 Hydra -407 18 Hydra -407 19 Hydra -407 20 Hydra -407 21 Hydra -407 22 Hydra -407 23 Hydra -407 24 Hydra -407 25 Hydra -407 26 Hydra -407 27 Hydra -407 28 Hydra -407 2 Centaurus -406 21 May 0845 22 May 0845 23 May 0845 24 May 0845 25 May 0845 26 May 0845 27 May 0845 28 May 0845 29 May 0845 30 May 0845 31 May 0845 1 June 0845 2 June 0845 3 June 0845 4 June 0845 5 June 0845 6 June 0845 7 June 0845 8 June 0845 9 June 0845 10 June 0845 11 June 0845 12 June 0845 13 June 0845 14 June 0845 15 June 0845 16 June 0845 17 June 0845 18 June 0845
MS -419475 MS -419476 MS -419477 MS -419478 MS -419479 MS -419480 MS -419481 MS -419482 MS -419483 MS -419484 MS -419485 MS -419486 MS -419487 MS -419488 MS -419489 MS -419490 MS -419491 MS -419492 MS -419493 MS -419494 MS -419495 MS -419496 MS -419497 MS -419498 MS -419499 MS -419500 MS -419501 MS -419502 MS -419448 MD -431137 MD -431136 MD -431135 MD -431134 MD -431133 MD -431132 MD -431131 MD -431130 MD -431129 MD -431128 MD -431127 MD -431126 MD -431125 MD -431124 MD -431123 MD -431122 MD -431121 MD -431120 MD -431119 MD -431118 MD -431117 MD -431116 MD -431115 MD -431114 MD -431113 MD -431112 MD -431111 MD -431110 MD -431109