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 -366→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -366 2 Hydra -366 3 Hydra -366 4 Hydra -366 5 Hydra -366 6 Hydra -366 7 Hydra -366 8 Hydra -366 9 Hydra -366 10 Hydra -366 11 Hydra -366 12 Hydra -366 13 Hydra -366 14 Hydra -366 15 Hydra -366 16 Hydra -366 17 Hydra -366 18 Hydra -366 19 Hydra -366 20 Hydra -366 21 Hydra -366 22 Hydra -366 23 Hydra -366 24 Hydra -366 25 Hydra -366 26 Hydra -366 27 Hydra -366 28 Hydra -366 2 Centaurus -365 11 July 0922 12 July 0922 13 July 0922 14 July 0922 15 July 0922 16 July 0922 17 July 0922 18 July 0922 19 July 0922 20 July 0922 21 July 0922 22 July 0922 23 July 0922 24 July 0922 25 July 0922 26 July 0922 27 July 0922 28 July 0922 29 July 0922 30 July 0922 31 July 0922 1 August 0922 2 August 0922 3 August 0922 4 August 0922 5 August 0922 6 August 0922 7 August 0922 8 August 0922
MS -392062 MS -392063 MS -392064 MS -392065 MS -392066 MS -392067 MS -392068 MS -392069 MS -392070 MS -392071 MS -392072 MS -392073 MS -392074 MS -392075 MS -392076 MS -392077 MS -392078 MS -392079 MS -392080 MS -392081 MS -392082 MS -392083 MS -392084 MS -392085 MS -392086 MS -392087 MS -392088 MS -392089 MS -392035 MD -402963 MD -402962 MD -402961 MD -402960 MD -402959 MD -402958 MD -402957 MD -402956 MD -402955 MD -402954 MD -402953 MD -402952 MD -402951 MD -402950 MD -402949 MD -402948 MD -402947 MD -402946 MD -402945 MD -402944 MD -402943 MD -402942 MD -402941 MD -402940 MD -402939 MD -402938 MD -402937 MD -402936 MD -402935