Psi Cassiopeiae

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ψ Cassiopeiae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cassiopeia
Right ascension 01h 25m 56.022s[1]
Declination +68° 07′ 48.05″[1]
Apparent magnitude (V) +4.72
Characteristics
Spectral type K0III
U−B color index +0.94
B−V color index +1.05
Variable type none
Astrometry
Radial velocity (Rv) −12 km/s
Proper motion (μ) RA: 75.50 ± 0.18[1] mas/yr
Dec.: 26.93 ± 0.16[1] mas/yr
Parallax (π) 16.72 ± 0.18[1] mas
Distance 195 ± 2 ly
(59.8 ± 0.6 pc)
Absolute magnitude (MV) +0.86
Other designations
36 Cassiopeiae, HR 399, HD 8491, BD+67°123, FK5 46, HIP 6692, SAO 11751, ADS 1129, CCDM J01259+6808
Map of the Bayer-designated stars in Cassiopeia. Psi Cassiopeiae is circled.

Psi Cassiopeiae (ψ Cas, ψ Cassiopeiae) is a binary star in the constellation Cassiopeia. It is approximately 195 light years from Earth.[1]

The primary component, ψ Cassiopeiae A, is an orange K-type giant with an apparent magnitude of +5.0;[2][3] it is a double star, designated CCDM J01259+6808AB,[4] with a fourteenth magnitude star (component B) located 3 arcseconds from the primary. Located about 25 arcseconds distant there is a 9.8 magnitude optical companion CCDM J01259+6808CD, designated ψ Cassiopeiae B in older star catalogues,[2] which is itself another double;[2][5] CD comprises a 9.4 magnitude component C and a 10 magnitude component D.[6]

Notes[edit]

  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:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c Norton, Arthur P. (1973), Norton's Star Atlas, p. 118, ISBN 0-85248-900-5 
  3. ^ Vizier, retrieved 2009-04-13 
  4. ^ SIMBAD, retrieved 2009-04-13 
  5. ^ SIMBAD, retrieved 2009-04-13, CCDM J01259+6808CD -- Double or multiple star 
  6. ^ VizieR Detailed Page, retrieved 2009-04-13