Hydra (constellation)

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Hydra
Constellation
Hydra
Abbreviation Hya
Genitive Hydrae
Pronunciation
Seembolism the sea serpent
Richt ascension 8–15 h
Declination −20°
Quadrant SQ2
Aurie 1303 sq. deg. (1st)
Main starns 17
Bayer/Flamsteed
stars
75
Starns wi planets 16
Starns brichter than 3.00m 2
Starns within 10.00 pc (32.62 ly) 4
Brichtest starn Alphard (α Hya) (1.98m)
Nearest starn LHS 3003
(20.67 ly, 6.34 pc)
Messier objects 3
Meteor showers
  • Alpha Hydrids
  • Sigma Hydrids
Borderin
constellations
Veesible at latitudes atween +54° an −83°.
Best veesible at 21:00 (9 p.m.) durin the month o Aprile.

Hydra is the lairgest o the 88 modren constellations, measurin 1303 square degrees. An aa ane o the langest at ower 100 degrees, its soothern end abuts Libra an Centaurus an its northren end borders Cancer.[1] It haes a lang history, havin been includit amang the 48 constellations leetit bi the 2nt century astronomer Ptolemy. It is commonly representit as a watter snake. It should nae be confused wi the similarly named constellation o Hydrus.

References[eedit | eedit soorce]

  1. Ridpath & Tirion 2001, pp. 158–160.

Coordinates: Sky map 10h 00m 00s, −20° 00′ 00″