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Hatysa

Nair al Saif, Iota Orionis, 44 Orionis

Proper NamesHatysa, Nair al Saif
Bayer DesignationIota Orionis
Flamsteed Number44 Orionis
HR (BSC)1899
HD37043
ConstellationOrion
Right Ascension5h 36m 17s
Declination-5° 54' 7"
Distancec.1,300 light years
c.400 parsecs
MagnitudeApparent: +2.8
Absolute: -6.5
Spectral ClassO9III Blue-white Giant
Optimum VisibilityDecember / January
NotesPart of the Sword of Orion, the Hatysa system contains four stars. At its heart is a binary system composed of two hot giant stars, with two other stars pursuing more distant orbits around them. The entire system forms part of the nebulous open cluster designated NGC 1980.

A very hot blue-white star in the constellation Orion. It is very distant, at more than 1,000 light years, and appears to be related to the Orion Nebula.

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