BL Crucis
| 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
- ↑ Watson, Christopher (25 August 2009). "BL Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 20 July 2014.
- ↑ Tabur, V.; Bedding, T. R. (2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society 400 (4): 1945–61. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
External links
- David H. Levy, Observing variable stars : a guide for the beginner ISBN 0521627559
- General Catalogue of Variable Stars
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