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 -400→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -400 2 Hydra -400 3 Hydra -400 4 Hydra -400 5 Hydra -400 6 Hydra -400 7 Hydra -400 8 Hydra -400 9 Hydra -400 10 Hydra -400 11 Hydra -400 12 Hydra -400 13 Hydra -400 14 Hydra -400 15 Hydra -400 16 Hydra -400 17 Hydra -400 18 Hydra -400 19 Hydra -400 20 Hydra -400 21 Hydra -400 22 Hydra -400 23 Hydra -400 24 Hydra -400 25 Hydra -400 26 Hydra -400 27 Hydra -400 28 Hydra -400 3 Centaurus -399 22 July 0858 23 July 0858 24 July 0858 25 July 0858 26 July 0858 27 July 0858 28 July 0858 29 July 0858 30 July 0858 31 July 0858 1 August 0858 2 August 0858 3 August 0858 4 August 0858 5 August 0858 6 August 0858 7 August 0858 8 August 0858 9 August 0858 10 August 0858 11 August 0858 12 August 0858 13 August 0858 14 August 0858 15 August 0858 16 August 0858 17 August 0858 18 August 0858 19 August 0858
MS -414795 MS -414796 MS -414797 MS -414798 MS -414799 MS -414800 MS -414801 MS -414802 MS -414803 MS -414804 MS -414805 MS -414806 MS -414807 MS -414808 MS -414809 MS -414810 MS -414811 MS -414812 MS -414813 MS -414814 MS -414815 MS -414816 MS -414817 MS -414818 MS -414819 MS -414820 MS -414821 MS -414822 MS -414768 MD -426327 MD -426326 MD -426325 MD -426324 MD -426323 MD -426322 MD -426321 MD -426320 MD -426319 MD -426318 MD -426317 MD -426316 MD -426315 MD -426314 MD -426313 MD -426312 MD -426311 MD -426310 MD -426309 MD -426308 MD -426307 MD -426306 MD -426305 MD -426304 MD -426303 MD -426302 MD -426301 MD -426300 MD -426299