Astronomy:Psi Cassiopeiae

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Short description: Star in the constellation Cassiopeia
Psi Cassiopeiae
Psi cassiopeiae diagram.jpg
Map of the Bayer-designated stars in Cassiopeia. Psi Cassiopeiae is circled.
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cassiopeia
Right ascension  01h 25m 56.02238s[1]
Declination +68° 07′ 48.0460″[1]
Apparent magnitude (V) +4.72[2]
Characteristics
Spectral type K0 III-IIIb CN0.5[3]
U−B color index +0.94
B−V color index +1.051[4]
Astrometry
Radial velocity (Rv)−12.7±0.3[2] 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
Distance195 ± 2 ly
(59.8 ± 0.6 pc)
Absolute magnitude (MV)0.869[4]
Details
ψ Cas A
Radius12[5] R☉
Luminosity50[6] L☉
Surface gravity (log g)2.74[7] cgs
Temperature4,952[6] K
Metallicity [Fe/H]−0.13[7] dex
Other designations
ψ Cas, 36 Cas, BD+67° 123, FK5 46, HD 8491, HIP 6692, HR 399, SAO 11751, ADS 1129, CCDM J01259+6808, WDS J01259+6808A[8]
Database references
SIMBADdata

Psi Cassiopeiae (ψ Cassiopeiae) is a binary star[9] system in the northern constellation of Cassiopeia.

The primary component, ψ Cassiopeiae A, is an orange K-type giant with an apparent magnitude of +5.0;[10][11] it is a double star, designated CCDM J01259+6808AB,[12] 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,[10] which is itself another double;[10][13] CD comprises a 9.4 magnitude component C and a 10 magnitude component D.[14]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G. 
  3. ↑ Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K. 
  4. ↑ 4.0 4.1 Soubiran, C. et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics 480 (1): 91–101, doi:10.1051/0004-6361:20078788, Bibcode: 2008A&A...480...91S. 
  5. ↑ Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  6. ↑ 6.0 6.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M. 
  7. ↑ 7.0 7.1 Soubiran, C. et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics 515: A111, doi:10.1051/0004-6361/201014247, Bibcode: 2010A&A...515A.111S. 
  8. ↑ "psi Cas". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=psi+Cas. 
  9. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  10. ↑ 10.0 10.1 10.2 Norton, Arthur P. (1973), Norton's Star Atlas, Gall & Inglis, p. 118, ISBN 0-85248-900-5, https://archive.org/details/nortonsstaratlas0000nort/page/118 
  11. ↑ Vizier, http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIC%206692, retrieved 2009-04-13 
  12. ↑ "* psi Cas". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+psi+Cas. 
  13. ↑ "BD+67 124". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B67+124. 
  14. ↑ VizieR Detailed Page, http://vizier.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J01259%2b6808CD, retrieved 2009-04-13 



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