Astronomy:W Crucis

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W Crucis
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas
Distance6,100 ± 500 ly
(1,900 ± 100 pc)
Other designations
CD−58 4431, CPD−58 4151, HD 105998, HIP 59483[4]
Database references
SIMBADdata

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

  1. 1.0 1.1 1.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G. 
  2. Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode2000A&A...355L..27H. 
  3. 3.0 3.1 Watson, Christopher (4 January 2010). "W Crucis". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10774. Retrieved 23 June 2014. 
  4. 4.0 4.1 4.2 4.3 4.4 "W Crucis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=W+Cru&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved 23 June 2014. 
  5. D. J. K. O'Connell (1951). "The so-called periastron effect in close eclipsing binaries". Riverview College Observatory Publications 2 (6): 85. Bibcode1951PRCO....2...85O.