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Proper NameNone
Bayer DesignationTau4 Eridani
Flamsteed Number16 Eridani
HR (BSC)1003
HD20720
ConstellationEridanus
Right Ascension3h 19m 31s
Declination-21° 45' 28"
Distance305 light years
93 parsecs
MagnitudeApparent: +3.7
Absolute: -1.1
Spectral ClassM3III-IIIaCa-1 Red Giant
Optimum VisibilityNovember / December
NotesOne of a string of nine stars all identified as 'Tau Eridani' in the middle part of the length of the constellation of the River. Tau4 Eridani is a red giant showing slow and irregular patterns of variability over extended periods. It is likely to be a binary, and may possibly be a multiple system.

Imagery provided by Aladin sky atlas

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