Pi Cassiopeiae

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π Cassiopeiae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cassiopeia
Right ascension 00h 43m 28.070s[1]
Declination +47° 01′ 28.37″[1]
Apparent magnitude (V) +4.95
Spectral type A5V
U−B color index +0.09
B−V color index +0.18
Variable type Ellipsoidal
Radial velocity (Rv) +013 km/s
Proper motion (μ) RA: −23.71 ± 0.23[1] mas/yr
Dec.: −36.84 ± 0.18[1] mas/yr
Parallax (π) 18.63 ± 0.32[1] mas
Distance 175 ± 3 ly
(53.7 ± 0.9 pc)
Absolute magnitude (MV) +1.31
Other designations
20 Cassiopeiae, HR 184, HD 4058, BD+46°146, HIP 3414, SAO 36602
Database references
Map of the Bayer-designated stars in Cassiopeia. Pi Cassiopeiae is circled.

Pi Cassiopeiae (π Cas, π Cassiopeiae) is a star in the constellation Cassiopeia.

π Cassiopeiae is a white A-type main sequence dwarf with a mean apparent magnitude of +4.95. It is approximately 175 light years from Earth.[1] It is classified as a rotating ellipsoidal variable star and its brightness varies by 0.02 magnitudes with a period of 23.57 hours.


  1. ^ a b c d e f 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