Psi Cassiopeiae (ψ Cassiopeiae) is a binary star[9] system in the northern constellation of Cassiopeia.
| Observation data Epoch J2000.0 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 mas[1] |
| Distance | 195 ± 2 ly (59.8 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.869[4] |
| Details | |
| ψ Cas A | |
| Radius | 12[5] R☉ |
| Luminosity | 50[6] L☉ |
| Surface gravity (log g) | 2.74[7] cgs |
| Temperature | 4,952[6] K |
| Metallicity [Fe/H] | −0.13[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
edit- ^ a b c d e 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, S2CID 18759600.
- ^ a b Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065, S2CID 119231169.
- ^ Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373, S2CID 123149047.
- ^ a b 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, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788, S2CID 16602121.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247, S2CID 118362423.
- ^ "psi Cas". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-29.
- ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ a b c Norton, Arthur P. (1973), Norton's Star Atlas, Gall & Inglis, p. 118, ISBN 0-85248-900-5
- ^ Vizier, retrieved 2009-04-13
- ^ "* psi Cas". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-13.
- ^ "BD+67 124". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-04-13.
- ^ VizieR Detailed Page, retrieved 2009-04-13