The Water Carrier

Abbreviation: Aqr
Genitive: Aquarii
Origin: [antiquity]

The constellation of Aquarius

Aquarius is a member of the zodiac. This is one of the most ancient of constellations, harking back to Babylonia and also associated with the annual flooding of the Nile in ancient Egypt. The Greeks considered it to be a water jar pouring water south into the open mouth of Piscis Austrinus, the southern fish. The Y-shaped asterism comprised of γ Aqr, ζ Aqr, η Aqr and π Aqr was sometimes considered a separate constellation called Urna, the water urn. Other old star atlases show the figure of the water carrier holding a nilometer in his left hand. This now-extinct constellation, comprised of the brighter stars running roughly north and south of μ Aqr, was called Norma Nilotica.

Notable Features

Designation Name Description
δ Aquariids The meteors in this July-August shower are of medium speed but are mostly faint. The parent comet of this shower is unknown but may be the same one that produced the Quadrantids in Boötes. The radiant is near the star Skat.
η Aquariids Up to half of these fast, bright meteors leave trains when they flash across the sky in April and May. Associated with the famous comet 1P/Halley, their radiant is near η Aqr.
α Aqr Sadalmelik
β Aqr Sadalsuud Although it has the Bayer designation β, this star is actually the brightest one in the constellation.
γ Aqr Sadachbia This star appears as Aoul al Achbiya (from the Arabic awwal ul‑akhbiyyah meaning 'the first tent') in Mohammad Al Achsasi Al Mouakket's calendarium. In Hindu astronomy, this star is known as Shatabhisha, from the Sanskrit shatabhishā meaning 'requiring a hundred physicians'.
δ Aqr Skat
ε Aqr Albali
θ Aqr Ancha
κ Aqr Situla
ξ Aqr Bunda This star appears as Thanih Saad al Saaoud (from the Arabic thāniyah saʿad us‑suʿūd meaning 'the second luckiest of the lucky stars') in Mohammad Al Achsasi Al Mouakket's calendarium.
EZ Aqr This is one of the closest stars to the Sun. It lies just over 11 light years away and shines at a feeble twelfth magnitude. It appears near the radiant of the δ Aquariid meteor shower on the sky map.
HD 206610 Bosona This eighth-magnitude star is known to have at least one exoplanet.
HD 212771 Lionrock This eighth-magnitude star is known to have at least one exoplanet.
WASP-6 Márohu This twelfth-magnitude star is known to have at least one exoplanet.
M2 This globular cluster is easily visible through binoculars. It is one of the largest known globular clusters.
M72 Another globular cluster, this object is difficult to resolve even through a telescope.
M73 This is perhaps the most puzzling of the Messier objects, a group of four stars. Once thought to be the remnants of an old open cluster, the stars are actually unrelated and merely form an asterism.
C55 Saturn Nebula A telescope reveals this planetary nebula to have a greenish colour. It is located near the star ν Aqr.
C63 Helix Nebula The bright planetary nebula is one of the closest such objects to Earth. Binoculars or a small telescope are sufficient to reveal its presence.