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 -65→
SolPhoDeiTerVenJovSat
1234
567891011
12131415161718
19202122232425
262728
1 Hydra -65 2 Hydra -65 3 Hydra -65 4 Hydra -65 5 Hydra -65 6 Hydra -65 7 Hydra -65 8 Hydra -65 9 Hydra -65 10 Hydra -65 11 Hydra -65 12 Hydra -65 13 Hydra -65 14 Hydra -65 15 Hydra -65 16 Hydra -65 17 Hydra -65 18 Hydra -65 19 Hydra -65 20 Hydra -65 21 Hydra -65 22 Hydra -65 23 Hydra -65 24 Hydra -65 25 Hydra -65 26 Hydra -65 27 Hydra -65 28 Hydra -65 2 Centaurus -64 28 October 1488 29 October 1488 30 October 1488 31 October 1488 1 November 1488 2 November 1488 3 November 1488 4 November 1488 5 November 1488 6 November 1488 7 November 1488 8 November 1488 9 November 1488 10 November 1488 11 November 1488 12 November 1488 13 November 1488 14 November 1488 15 November 1488 16 November 1488 17 November 1488 18 November 1488 19 November 1488 20 November 1488 21 November 1488 22 November 1488 23 November 1488 24 November 1488
MS -190816 MS -190817 MS -190818 MS -190819 MS -190820 MS -190821 MS -190822 MS -190823 MS -190824 MS -190825 MS -190826 MS -190827 MS -190828 MS -190829 MS -190830 MS -190831 MS -190832 MS -190833 MS -190834 MS -190835 MS -190836 MS -190837 MS -190838 MS -190839 MS -190840 MS -190841 MS -190842 MS -190843 MS -190789 MD -196126 MD -196125 MD -196124 MD -196123 MD -196122 MD -196121 MD -196120 MD -196119 MD -196118 MD -196117 MD -196116 MD -196115 MD -196114 MD -196113 MD -196112 MD -196111 MD -196110 MD -196109 MD -196108 MD -196107 MD -196106 MD -196105 MD -196104 MD -196103 MD -196102 MD -196101 MD -196100 MD -196099