W Coronae Borealis

W Coronae Borealis (W CrB) is a Mira-type long period variable star in the constellation Corona Borealis. Its apparent magnitude varies between 7.8 and 14.3 over a period of 238 days.[4]

W Coronae Borealis
Observation data
Epoch J2000      Equinox J2000
Constellation Corona Borealis
Right ascension 16h 15m 24.549s[1]
Declination +37° 47′ 44.21″[1]
Apparent magnitude (V) 7.8 - 14.3[2]
Characteristics
Evolutionary stage asymptotic giant branch
Spectral type M2e-M5e[2]
Variable type mira[2]
Astrometry
Proper motion (μ) RA: −9.527[1] mas/yr
Dec.: -6.275[1] mas/yr
Parallax (π)0.4201 ± 0.0447[1] mas
Distanceapprox. 7,800 ly
(approx. 2,400 pc)
Other designations
HD 146560[3]
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
  2. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  3. "W Coronae Borealis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 9 March 2015.
  4. VSX (4 January 2010). "W Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. Retrieved 9 March 2015.


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