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 -537→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -537 2 Hydra -537 3 Hydra -537 4 Hydra -537 5 Hydra -537 6 Hydra -537 7 Hydra -537 8 Hydra -537 9 Hydra -537 10 Hydra -537 11 Hydra -537 12 Hydra -537 13 Hydra -537 14 Hydra -537 15 Hydra -537 16 Hydra -537 17 Hydra -537 18 Hydra -537 19 Hydra -537 20 Hydra -537 21 Hydra -537 22 Hydra -537 23 Hydra -537 24 Hydra -537 25 Hydra -537 26 Hydra -537 27 Hydra -537 28 Hydra -537 2 Centaurus -536 22 October 0600 23 October 0600 24 October 0600 25 October 0600 26 October 0600 27 October 0600 28 October 0600 29 October 0600 30 October 0600 31 October 0600 1 November 0600 2 November 0600 3 November 0600 4 November 0600 5 November 0600 6 November 0600 7 November 0600 8 November 0600 9 November 0600 10 November 0600 11 November 0600 12 November 0600 13 November 0600 14 November 0600 15 November 0600 16 November 0600 17 November 0600 18 November 0600
MS -506392 MS -506393 MS -506394 MS -506395 MS -506396 MS -506397 MS -506398 MS -506399 MS -506400 MS -506401 MS -506402 MS -506403 MS -506404 MS -506405 MS -506406 MS -506407 MS -506408 MS -506409 MS -506410 MS -506411 MS -506412 MS -506413 MS -506414 MS -506415 MS -506416 MS -506417 MS -506418 MS -506419 MS -506365 MD -520468 MD -520467 MD -520466 MD -520465 MD -520464 MD -520463 MD -520462 MD -520461 MD -520460 MD -520459 MD -520458 MD -520457 MD -520456 MD -520455 MD -520454 MD -520453 MD -520452 MD -520451 MD -520450 MD -520449 MD -520448 MD -520447 MD -520446 MD -520445 MD -520444 MD -520443 MD -520442 MD -520441