BL Crucis
From Infogalactic: the planetary knowledge core
Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Crux |
Right ascension | 12h 27m 28.88s |
Declination | −58° 59′ 30.4″ |
Apparent magnitude (V) | 5.38 |
Characteristics | |
Spectral type | M4-5III |
Variable type | semiregular variable |
Astrometry | |
Radial velocity (Rv) | 71.7 ± 0.9 km/s |
Parallax (π) | 7.36 ± 0.32 mas |
Distance | 440 ± 20 ly (136 ± 6 pc) |
Details | |
Other designations | |
BL Crucis is a red giant and a semiregular variable in the constellation of Crux.[1] It has periods with three frequencies of 30.7, 42.3 and 43.6 days.[2]
References
External links
- David H. Levy, Observing variable stars : a guide for the beginner ISBN 0521627559
- General Catalogue of Variable Stars
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