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Proper NameNone
Bayer DesignationNone
Flamsteed NumberNone
HR (BSC)1363
HD27563
ConstellationEridanus
Right Ascension4h 21m 34s
Declination-7° 33' 12"
Distance790 light years
242 parsecs
MagnitudeApparent: +5.8
Absolute: -1.1
Spectral ClassB5III Blue Giant
Optimum VisibilityDecember
NotesA giant blue star emitting hundreds of times the energy of the Sun, EM Eridani shows complex overlapping patterns of variability. Its apparent magnitude oscillates close to +5.8, but over periods of several days or weeks its brightness can peak unpredictably.

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