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 -299→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -299 2 Hydra -299 3 Hydra -299 4 Hydra -299 5 Hydra -299 6 Hydra -299 7 Hydra -299 8 Hydra -299 9 Hydra -299 10 Hydra -299 11 Hydra -299 12 Hydra -299 13 Hydra -299 14 Hydra -299 15 Hydra -299 16 Hydra -299 17 Hydra -299 18 Hydra -299 19 Hydra -299 20 Hydra -299 21 Hydra -299 22 Hydra -299 23 Hydra -299 24 Hydra -299 25 Hydra -299 26 Hydra -299 27 Hydra -299 28 Hydra -299 2 Centaurus -298 30 July 1048 31 July 1048 1 August 1048 2 August 1048 3 August 1048 4 August 1048 5 August 1048 6 August 1048 7 August 1048 8 August 1048 9 August 1048 10 August 1048 11 August 1048 12 August 1048 13 August 1048 14 August 1048 15 August 1048 16 August 1048 17 August 1048 18 August 1048 19 August 1048 20 August 1048 21 August 1048 22 August 1048 23 August 1048 24 August 1048 25 August 1048 26 August 1048
MS -347267 MS -347268 MS -347269 MS -347270 MS -347271 MS -347272 MS -347273 MS -347274 MS -347275 MS -347276 MS -347277 MS -347278 MS -347279 MS -347280 MS -347281 MS -347282 MS -347283 MS -347284 MS -347285 MS -347286 MS -347287 MS -347288 MS -347289 MS -347290 MS -347291 MS -347292 MS -347293 MS -347294 MS -347240 MD -356923 MD -356922 MD -356921 MD -356920 MD -356919 MD -356918 MD -356917 MD -356916 MD -356915 MD -356914 MD -356913 MD -356912 MD -356911 MD -356910 MD -356909 MD -356908 MD -356907 MD -356906 MD -356905 MD -356904 MD -356903 MD -356902 MD -356901 MD -356900 MD -356899 MD -356898 MD -356897 MD -356896