W Crucis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux |
| Right ascension | 12h 11m 59.16182s[1] |
| Declination | −58° 47′ 00.7374″[1] |
| Apparent magnitude (V) | 8.44[2] (9.04–10.38)[3] |
| Characteristics | |
| Evolutionary stage | F2/F3II+B6.0[4][failed verification] |
| Astrometry | |
| Radial velocity (Rv) | −22.6 ± 2[4] km/s |
| Proper motion (μ) | RA: −6.142[4] mas/yr Dec.: 0.198[4] mas/yr |
| Parallax (π) | 0.5363 ± 0.0421 mas[1] |
| Distance | 6,100 ± 500 ly (1,900 ± 100 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
W Crucis is a star system in the constellation Crux. A Beta Lyrae variable, its apparent magnitude ranges from 9.04 to 10.38 over 198 days.[3] Its light curve has been observed to be asymmetric with subsequent maxima differing in height,[5] which is described as the so-called O'Connell effect.
References
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
- ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b Watson, Christopher (4 January 2010). "W Crucis". AAVSO Website. American Association of Variable Star Observers. Retrieved 23 June 2014.
- ^ a b c d e "W Crucis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 23 June 2014.
- ^ D. J. K. O'Connell (1951). "The so-called periastron effect in close eclipsing binaries". Riverview College Observatory Publications. 2 (6): 85. Bibcode:1951PRCO....2...85O.
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