52 Cygni
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 45m 39.75304s[1] |
| Declination | +30° 43′ 10.9756″[1] |
| Apparent magnitude (V) | 4.22[2] / 9.5 |
| Characteristics | |
| Spectral type | G9.5III[3] |
| U−B color index | +0.88[2] |
| B−V color index | +1.05[2] |
| Astrometry | |
| Radial velocity (Rv) | –0.72[4] km/s |
| Proper motion (μ) | RA: –8.98[1] mas/yr Dec.: +24.11[1] mas/yr |
| Parallax (π) | 16.22 ± 0.19[1] mas |
| Distance | 201 ± 2 ly (61.7 ± 0.7 pc) |
| Details | |
| Radius | 7.3[5] R☉ |
| Luminosity | 89[6] L☉ |
| Surface gravity (log g) | 2.5[6] cgs |
| Temperature | 4,677[6] K |
| Metallicity [Fe/H] | −0.24[6] dex |
| Rotational velocity (v sin i) | 3.7[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
52 Cygni is a triple star system in the northern constellation of Cygnus with a combined apparent magnitude of 4.22.[2] The brighter component is a probable spectroscopic binary that may consist of two similar stars; these are evolved giant stars with a combined stellar classification of G9.5III. An angular separation of 6.0″ is a faint, magnitude 9.5 companion.[3]
References
- 1 2 3 4 5 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:10.1051/0004-6361:20078357Vizier catalog entry
- 1 2 3 4 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- 1 2 Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics 430 (1): 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272
- ↑ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics 367: 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451
- 1 2 3 4 5 Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209
External links
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