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 -206→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -206 2 Hydra -206 3 Hydra -206 4 Hydra -206 5 Hydra -206 6 Hydra -206 7 Hydra -206 8 Hydra -206 9 Hydra -206 10 Hydra -206 11 Hydra -206 12 Hydra -206 13 Hydra -206 14 Hydra -206 15 Hydra -206 16 Hydra -206 17 Hydra -206 18 Hydra -206 19 Hydra -206 20 Hydra -206 21 Hydra -206 22 Hydra -206 23 Hydra -206 24 Hydra -206 25 Hydra -206 26 Hydra -206 27 Hydra -206 28 Hydra -206 2 Centaurus -205 20 July 1223 21 July 1223 22 July 1223 23 July 1223 24 July 1223 25 July 1223 26 July 1223 27 July 1223 28 July 1223 29 July 1223 30 July 1223 31 July 1223 1 August 1223 2 August 1223 3 August 1223 4 August 1223 5 August 1223 6 August 1223 7 August 1223 8 August 1223 9 August 1223 10 August 1223 11 August 1223 12 August 1223 13 August 1223 14 August 1223 15 August 1223 16 August 1223 17 August 1223
MS -285087 MS -285088 MS -285089 MS -285090 MS -285091 MS -285092 MS -285093 MS -285094 MS -285095 MS -285096 MS -285097 MS -285098 MS -285099 MS -285100 MS -285101 MS -285102 MS -285103 MS -285104 MS -285105 MS -285106 MS -285107 MS -285108 MS -285109 MS -285110 MS -285111 MS -285112 MS -285113 MS -285114 MS -285060 MD -293016 MD -293015 MD -293014 MD -293013 MD -293012 MD -293011 MD -293010 MD -293009 MD -293008 MD -293007 MD -293006 MD -293005 MD -293004 MD -293003 MD -293002 MD -293001 MD -293000 MD -292999 MD -292998 MD -292997 MD -292996 MD -292995 MD -292994 MD -292993 MD -292992 MD -292991 MD -292990 MD -292989 MD -292988