Alpha Tucanae

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α Tucanae
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Tucana
Right ascension 22h 18m 30.1s
Declination −60° 15' 35"
Apparent magnitude (V) +2.87
Distance 199 ± 7 ly
(61 ± 2 pc)
Spectral type K3III
Other designations
HR 8502, HD 211416,
CP-60 7561, FK5 841,
HIP 110130, SAO 255193,
GC 31183, CCDM 22185-6016

Alpha Tucanae (α Tuc / α Tucanae) is a binary star in the constellation Tucana.

The primary component, Alpha Tucanae A, is an orange K-type giant with an apparent magnitude of +2.87. It is approximately 199 light years from Earth. The system is an astrometric binary, which means that the companion star has not been directly observed, but its presence has been inferred from measuring changes in the proper motion of the primary. The orbital period of the binary system is 11.5 years.


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