BL Crucis

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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)
Other designations
HD 108396, HIP 60781, HR 4739, SAO 239960, CD−58° 4560
Database references
SIMBAD data

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[edit]

  1. ^ Watson, Christopher (25 August 2009). "BL Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 20 July 2014. 
  2. ^ 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:0908.3228Freely accessible. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x. 

External links[edit]