WZ Cassiopeiae

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WZ Cassiopeiae
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 00h 01m 15.855s[1]
Declination +60° 21′ 19.02″[1]
Apparent magnitude (V) 7.06
Spectral type CII
B−V color index 3.08
Variable type Semiregular
Radial velocity (Rv) −34 km/s
Proper motion (μ) RA: 9.33 ± 0.46[1] mas/yr
Dec.: −6.11 ± 0.41[1] mas/yr
Parallax (π) 2.71 ± 0.48[2] mas
Distance approx. 1,200 ly
(approx. 370 pc)
Temperature 3,000 K
Other designations
BD+59° 2810, HD 224855, HIP 99, SAO 21002.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

WZ Cassiopeiae (WZ Cas) is a variable carbon star in the northern constellation of Cassiopeia. It varies between magnitudes 6.5 to 8.5 with a period of 186 days. The star is of a deep red colour and attended by a bluish companion, which is separated from the primary by 57.68 arcseconds.


  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Martell, Sarah; Sharma, Sanjib; Buder, Sven; Duong, Ly; Schlesinger, Katharine; Simpson, Jeffrey; Lind, Karin; Ness, Melissa; Marshall, Jonathan; et al. (2016). "The GALAH Survey: Observational Overview and Gaia DR1 companion". 1609: arXiv:1609.02822. arXiv:1609.02822Freely accessible. Bibcode:2016arXiv160902822M.