  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 57m 10.41907s [1] |
| Declination | 41° 10′ 01.6991″ [1] |
| Apparent magnitude (V) | 3.94 [2] |
| Characteristics | |
| Spectral type | A0III n [3] |
| U−B color index | +0.00 [2] |
| B−V color index | +0.02 [2] |
| Astrometry | |
| Radial velocity (Rv) | −27.60 [4] km/s |
| Proper motion (μ) |
RA: +9.64
[1]
mas/
yr Dec.: −22.75 [1] mas/ yr |
| Parallax (π) | 8.71 ± 0.34 mas [1] |
| Distance | 370 ± 10
ly (115 ± 4 pc) |
| Absolute magnitude (MV) | −1.36 [5] |
| Details | |
| ν Cyg A | |
| Mass | 3.62±0.08 [6] M☉ |
| Radius | 1.90 [7] R☉ |
| Luminosity | 412 [6] L☉ |
| Temperature | 9,462 [6] K |
| Rotational velocity (v sin i) | 217 [6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Cygni, Latinized from ν Cygni, is a binary star [9] system in the constellation Cygnus. Its apparent magnitude is 3.94 [2] and it is approximately 374 light years away based on parallax. [1] The brighter component is a magnitude 4.07 A-type giant star with a stellar classification of A0III n, [3] where the 'n' indicates broad "nebulous" absorption lines due to rapid rotation. This white-hued star has an estimated 3.6 [6] times the mass of the Sun and about 1.9 [7] times the Sun's radius. It is radiating 412 [6] times the Sun's luminosity from its photosphere at an effective temperature of 9,462 K. [6] The magnitude 6.4 companion has an angular separation of 0.24 " from the primary. [9]
References
- ^ 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. S2CID 18759600. Vizier catalog entry
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode: 2002yCat.2237....0D.
- ^ a b Abt, Helmut A; Morrell, Nidia I (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182. Vizier catalog entry
- ^ Gontcharov, G. A. (November 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754 Vizier catalog entry
- ^ "* nu. Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 March 2017.
- ^ a b 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 Vizier catalog entry
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 57m 10.41907s [1] |
| Declination | 41° 10′ 01.6991″ [1] |
| Apparent magnitude (V) | 3.94 [2] |
| Characteristics | |
| Spectral type | A0III n [3] |
| U−B color index | +0.00 [2] |
| B−V color index | +0.02 [2] |
| Astrometry | |
| Radial velocity (Rv) | −27.60 [4] km/s |
| Proper motion (μ) |
RA: +9.64
[1]
mas/
yr Dec.: −22.75 [1] mas/ yr |
| Parallax (π) | 8.71 ± 0.34 mas [1] |
| Distance | 370 ± 10
ly (115 ± 4 pc) |
| Absolute magnitude (MV) | −1.36 [5] |
| Details | |
| ν Cyg A | |
| Mass | 3.62±0.08 [6] M☉ |
| Radius | 1.90 [7] R☉ |
| Luminosity | 412 [6] L☉ |
| Temperature | 9,462 [6] K |
| Rotational velocity (v sin i) | 217 [6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Cygni, Latinized from ν Cygni, is a binary star [9] system in the constellation Cygnus. Its apparent magnitude is 3.94 [2] and it is approximately 374 light years away based on parallax. [1] The brighter component is a magnitude 4.07 A-type giant star with a stellar classification of A0III n, [3] where the 'n' indicates broad "nebulous" absorption lines due to rapid rotation. This white-hued star has an estimated 3.6 [6] times the mass of the Sun and about 1.9 [7] times the Sun's radius. It is radiating 412 [6] times the Sun's luminosity from its photosphere at an effective temperature of 9,462 K. [6] The magnitude 6.4 companion has an angular separation of 0.24 " from the primary. [9]
References
- ^ 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. S2CID 18759600. Vizier catalog entry
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode: 2002yCat.2237....0D.
- ^ a b Abt, Helmut A; Morrell, Nidia I (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement. 99: 135. Bibcode: 1995ApJS...99..135A. doi: 10.1086/192182. Vizier catalog entry
- ^ Gontcharov, G. A. (November 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971, Bibcode: 2012AstL...38..331A, doi: 10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754 Vizier catalog entry
- ^ "* nu. Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 March 2017.
- ^ a b 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 Vizier catalog entry