Lambda Tucanae

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The Bayer designation Lambda Tucanae (λ Tuc, λ Tucanae) is shared by two star systems, λ¹ Tucanae and λ² Tucanae, in the constellation Tucana. They are separated by 0.23° in the sky.

λ¹ Tucanae[edit]

λ¹ Tucanae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Tucana
Right ascension 00h 52m 24.3s
Declination −69° 30' 16"
Apparent magnitude (V) +6.67
Distance 200 ± 19 ly
(61 ± 6 pc)
Spectral type F7IV-V
Other designations
HR 252, HD 5190 + HD 5208,
CP-70 37 + CP-70 38, HIP 4084,
SAO 248269 + SAO 248271,
GC 1056, CCDM 00524-6930

Lambda-1 Tucanae is a binary star approximately 206 light years from Earth. The primary component, Lambda-1 Tucanae A, is a yellow-white F-type subgiant with an apparent magnitude of +6.22. It has an 8th magnitude companion, Lambda-1 Tucanae B, which is 20 arcseconds from the primary.

λ² Tucanae[edit]

λ² Tucanae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Tucana
Right ascension 00h 55m 00.3s
Declination −69° 31' 37"
Apparent magnitude (V) +5.45
Distance 210 ± 7 ly
(64 ± 2 pc)
Spectral type K2III
Other designations
HR 270, HD 5457,
CP-70 40, FK5 34,
HIP 4293, SAO 248281,
GC 1102

Lambda-2 Tucanae is an orange K-type giant with an apparent magnitude of +5.46. It is approximately 220 light years from Earth.[1]

References[edit]

  1. ^ "Lambda 2 Tucanae - Red Giant Branch Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 20 October 2013.