BL Crucis is a red giant and a semiregular variable in the constellation of Crux.[3] It has periods with three frequencies of 30.7, 42.3 and 43.6 days.[1] It is 480 ± 10 light-years distant from Earth.[2]
| 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 |
| Proper motion (μ) | RA: -20.027 ± 0.301[2] mas/yr Dec.: 3.586 ± 0.268 [2] mas/yr |
| Parallax (π) | 6.8429 ± 0.1942 mas[2] |
| Distance | 480 ± 10 ly (146 ± 4 pc) |
| Other designations | |
HD 108396, HIP 60781, HR 4739, SAO 239960, CD−58° 4560 | |
| Database references | |
| SIMBAD | data |
Constellation of Crux | |||||||||||
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