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 -471→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -471 2 Hydra -471 3 Hydra -471 4 Hydra -471 5 Hydra -471 6 Hydra -471 7 Hydra -471 8 Hydra -471 9 Hydra -471 10 Hydra -471 11 Hydra -471 12 Hydra -471 13 Hydra -471 14 Hydra -471 15 Hydra -471 16 Hydra -471 17 Hydra -471 18 Hydra -471 19 Hydra -471 20 Hydra -471 21 Hydra -471 22 Hydra -471 23 Hydra -471 24 Hydra -471 25 Hydra -471 26 Hydra -471 27 Hydra -471 28 Hydra -471 3 Centaurus -470 23 December 0724 24 December 0724 25 December 0724 26 December 0724 27 December 0724 28 December 0724 29 December 0724 30 December 0724 31 December 0724 1 January 0725 2 January 0725 3 January 0725 4 January 0725 5 January 0725 6 January 0725 7 January 0725 8 January 0725 9 January 0725 10 January 0725 11 January 0725 12 January 0725 13 January 0725 14 January 0725 15 January 0725 16 January 0725 17 January 0725 18 January 0725 19 January 0725 20 January 0725
MS -462265 MS -462266 MS -462267 MS -462268 MS -462269 MS -462270 MS -462271 MS -462272 MS -462273 MS -462274 MS -462275 MS -462276 MS -462277 MS -462278 MS -462279 MS -462280 MS -462281 MS -462282 MS -462283 MS -462284 MS -462285 MS -462286 MS -462287 MS -462288 MS -462289 MS -462290 MS -462291 MS -462292 MS -462238 MD -475116 MD -475115 MD -475114 MD -475113 MD -475112 MD -475111 MD -475110 MD -475109 MD -475108 MD -475107 MD -475106 MD -475105 MD -475104 MD -475103 MD -475102 MD -475101 MD -475100 MD -475099 MD -475098 MD -475097 MD -475096 MD -475095 MD -475094 MD -475093 MD -475092 MD -475091 MD -475090 MD -475089 MD -475088