The Constellation Hydrus

by Dominic Ford
Hydrus Hydrus
The constellation Hydrus. Roll mouse over to see labels.
Source: Stellarium.

Hydrus is a small constellation close to the south celestial pole. At most southern latitudes it is circumpolar, but appears highest in the midnight sky in October.

Easily confused with Hydra, the mythological water snake, Hydrus is a smaller water snake introduced by Pieter Dirkszoon Keyser and Frederick de Houtman, which first appeared on star maps in 1598. It is one of twelve constellations they introduced in that year which celebrate rare or exotic animals.

Hydrus is represented by three third-magnitude stars and two fourth-magnitude stars in a line which snakes between the Large and Small Magallanic Clouds (LMC and SMC).

It does not have any bright deep sky objects.

Date First Appeared
1598 (Keyser & de Houtman)
Sky Area
0.6% of the sky
243.0 square degrees
Messier Objects
Hydrus contains no Messier objects
Caldwell Objects
Hydrus contains no Caldwell objects
The following constellations neighbor Hydrus: Dorado, Eridanus, Horologium, Mensa, Octans, Phoenix, Reticulum, Tucana.
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Brightest Objects in Hydrus

Stars Open Clusters Globular Clusters Galaxies
Stars Open Clusters Globular Clusters Galaxies
β-Hyi (mag 2.8) NGC 1629 NGC 1466 (mag 11.4) NGC 1511 (mag 12.0)
α-Hyi (mag 2.9) NGC 643 (mag 13.0) NGC 646
γ-Hyi (mag 3.3) NGC 1473
δ-Hyi (mag 4.1) NGC 802
ε-Hyi (mag 4.1) NGC 813
η²-Hyi (mag 4.7)
ν-Hyi (mag 4.8)
ζ-Hyi (mag 4.8)
λ-Hyi (mag 5.1)
μ-Hyi (mag 5.3)
θ-Hyi (mag 5.5)
ι-Hyi (mag 5.5)
π¹-Hyi (mag 5.6)
π²-Hyi (mag 5.7)
BN Hyi (mag 5.7)
HD 10615 (mag 5.7)
HD 8810 (mag 5.9)
HD 21722 (mag 6.0)
HD 1801 (mag 6.0)
κ-Hyi (mag 6.0)
τ²-Hyi (mag 6.0)
σ-Hyi (mag 6.2)
τ¹-Hyi (mag 6.4)
η¹-Hyi (mag 6.8)
HD 299399 (mag 11.9)




Color scheme