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Proper NameNone
Bayer DesignationEta Centauri
Flamsteed NumberNone
HR (BSC)5440
Right Ascension14h 35m 30s
Declination-42° 9' 28"
Distance306 light years
94 parsecs
MagnitudeApparent: +2.3
Absolute: -2.5
Spectral ClassB1.5V Blue Dwarf
Optimum VisibilityMay
NotesEta Centauri is a 'shell star', a body whose extremely rapid rotation results in a shell or ring of matter extending out from the star itself. In this case the star's ring system is aligned edge-on to the line of sight from Earth, and the processes that create it cause the luminosity to change in complex patterns.


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