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Proper Name	Head of Hydrus
Bayer Designation	Alpha Hydri
Flamsteed Number	None
HR (BSC)	591
HD	12311
Constellation	Hydrus
Right Ascension	1h 58m 46s
Declination	-61° 34' 11"
Distance	72 light years 22 parsecs
Magnitude	Apparent: +2.9 Absolute: +1.1
Spectral Class	F0III-IVn bright yellow giant
Optimum Visibility	October / November (Usually visible from southern latitudes)
Notes	A pale yellow F-type star on the boundary between the subgiant and giant classifications, the Head of Hydrus is desigated Alpha Hydri (although it is in fact marginally fainter than the Beta star of its constellation). The Head of Hydrus is a rather larger and hotter star than the Sun, being some 2.6 times the Sun's diameter and mearly thirty times as luminous.

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