| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula |
| 2 Vul A | |
| Right ascension | 19h 17m 43.6354s [1] |
| Declination | +23° 01′ 31.9418″ [1] |
| Apparent magnitude (V) | 5.43 [2] |
| 2 Vul B | |
| Right ascension | 19h 17m 43.7343s [3] |
| Declination | +23° 01′ 30.8604″ [3] |
| Characteristics | |
| Spectral type | B1 IV [4] |
| B−V color index | 0.020±0.003 [2] |
| Variable type | β Cep [5] |
| Astrometry | |
| 2 Vul A | |
| Radial velocity (Rv) | +1.0±4.2 [2] km/s |
| Proper motion (μ) |
RA: +0.956±0.041
[1]
mas/
yr Dec.: −6.636±0.087 [1] mas/ yr |
| Parallax (π) | 1.8212 ± 0.0880 mas [1] |
| Distance | 1,790 ± 90
ly (550 ± 30 pc) |
| Absolute magnitude (MV) | −2.35 [2] |
| 2 Vul B | |
| Proper motion (μ) |
RA: −0.170±0.038
[3]
mas/
yr Dec.: −5.324±0.073 [3] mas/ yr |
| Parallax (π) | 1.7131 ± 0.0757 mas [3] |
| Distance | 1,900 ± 80
ly (580 ± 30 pc) |
| Details | |
| Mass | 12.5±0.6 [6] M☉ |
| Luminosity (bolometric) | 21,922 [7] L☉ |
| Temperature | 26,850 [7] K |
| Metallicity [Fe/H] | −0.06±0.10 [8] dex |
| Rotational velocity (v sin i) | 270 [9] km/s |
| Age | 12.6±0.7 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
2 Vulpeculae is a binary star [11] system in the northern constellation of Vulpecula, located around 1,800 light years away [1] from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.43. [2]
2 Vulpeculae is a double-lined spectroscopic binary; [11] as of 2002, the pair had an angular separation of 1.72 ″ along a position angle of 127.2°. [12]
The primary component of the binary is a rapidly rotating Be star [13] with a stellar classification of B1 IV. [4] It is a variable star with an amplitude of 0.06 magnitude and a period of 0.6096 days, tentatively classified as Beta Cephei variable. [5] The variability was discovered in 1959, [14] and it has been assigned the variable star designation ES Vulpeculae. [5]
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e 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 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Rountree, Janet; Sonneborn, George (1991). "Criteria for the spectral classification of B stars in the ultraviolet". Astrophysical Journal. 369: 515. Bibcode: 1991ApJ...369..515R. doi: 10.1086/169781.
- ^ a b c Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. S2CID 125853869.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883. Bibcode: 2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
- ^ a b Hohle, M. M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv: 1003.2335. Bibcode: 2010AN....331..349H. doi: 10.1002/asna.200911355. S2CID 111387483.
- ^ Gáspár, András; et al. (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv: 1604.07403. Bibcode: 2016ApJ...826..171G. doi: 10.3847/0004-637X/826/2/171. S2CID 119241004.
- ^ Abt, Helmut A.; et al. (July 2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode: 2002ApJ...573..359A. doi: 10.1086/340590.
- ^ "2 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-12.
- ^ a b Chini, R.; et al. (2012). "A spectroscopic survey on the multiplicity of high-mass stars". Monthly Notices of the Royal Astronomical Society. 424 (3): 1925–1929. arXiv: 1205.5238. Bibcode: 2012MNRAS.424.1925C. doi: 10.1111/j.1365-2966.2012.21317.x. S2CID 119120749.
- ^ Roberts, Lewis C. Jr. (May 2011). "Astrometric and photometric measurements of binary stars with adaptive optics: observations from 2002". Monthly Notices of the Royal Astronomical Society. 413 (2): 1200–1205. arXiv: 1012.3383. Bibcode: 2011MNRAS.413.1200R. doi: 10.1111/j.1365-2966.2011.18205.x. S2CID 118398949.
- ^ Balona, L. A. (December 1995). "Tests of the Pulsation and Starspot Models for the Periodic Be-Stars". Monthly Notices of the Royal Astronomical Society. 277 (4): 1547. Bibcode: 1995MNRAS.277.1547B. doi: 10.1093/mnras/277.4.1547.
- ^ Lynds, C. R. (1959). "The Light-Variability of Early B Giants". The Astrophysical Journal. 130: 577. Bibcode: 1959ApJ...130..577L. doi: 10.1086/146747.
- 2 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula |
| 2 Vul A | |
| Right ascension | 19h 17m 43.6354s [1] |
| Declination | +23° 01′ 31.9418″ [1] |
| Apparent magnitude (V) | 5.43 [2] |
| 2 Vul B | |
| Right ascension | 19h 17m 43.7343s [3] |
| Declination | +23° 01′ 30.8604″ [3] |
| Characteristics | |
| Spectral type | B1 IV [4] |
| B−V color index | 0.020±0.003 [2] |
| Variable type | β Cep [5] |
| Astrometry | |
| 2 Vul A | |
| Radial velocity (Rv) | +1.0±4.2 [2] km/s |
| Proper motion (μ) |
RA: +0.956±0.041
[1]
mas/
yr Dec.: −6.636±0.087 [1] mas/ yr |
| Parallax (π) | 1.8212 ± 0.0880 mas [1] |
| Distance | 1,790 ± 90
ly (550 ± 30 pc) |
| Absolute magnitude (MV) | −2.35 [2] |
| 2 Vul B | |
| Proper motion (μ) |
RA: −0.170±0.038
[3]
mas/
yr Dec.: −5.324±0.073 [3] mas/ yr |
| Parallax (π) | 1.7131 ± 0.0757 mas [3] |
| Distance | 1,900 ± 80
ly (580 ± 30 pc) |
| Details | |
| Mass | 12.5±0.6 [6] M☉ |
| Luminosity (bolometric) | 21,922 [7] L☉ |
| Temperature | 26,850 [7] K |
| Metallicity [Fe/H] | −0.06±0.10 [8] dex |
| Rotational velocity (v sin i) | 270 [9] km/s |
| Age | 12.6±0.7 [6] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
2 Vulpeculae is a binary star [11] system in the northern constellation of Vulpecula, located around 1,800 light years away [1] from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.43. [2]
2 Vulpeculae is a double-lined spectroscopic binary; [11] as of 2002, the pair had an angular separation of 1.72 ″ along a position angle of 127.2°. [12]
The primary component of the binary is a rapidly rotating Be star [13] with a stellar classification of B1 IV. [4] It is a variable star with an amplitude of 0.06 magnitude and a period of 0.6096 days, tentatively classified as Beta Cephei variable. [5] The variability was discovered in 1959, [14] and it has been assigned the variable star designation ES Vulpeculae. [5]
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e 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 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Rountree, Janet; Sonneborn, George (1991). "Criteria for the spectral classification of B stars in the ultraviolet". Astrophysical Journal. 369: 515. Bibcode: 1991ApJ...369..515R. doi: 10.1086/169781.
- ^ a b c Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode: 2017ARep...61...80S. doi: 10.1134/S1063772917010085. S2CID 125853869.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv: 1007.4883. Bibcode: 2011MNRAS.410..190T. doi: 10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
- ^ a b Hohle, M. M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv: 1003.2335. Bibcode: 2010AN....331..349H. doi: 10.1002/asna.200911355. S2CID 111387483.
- ^ Gáspár, András; et al. (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv: 1604.07403. Bibcode: 2016ApJ...826..171G. doi: 10.3847/0004-637X/826/2/171. S2CID 119241004.
- ^ Abt, Helmut A.; et al. (July 2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode: 2002ApJ...573..359A. doi: 10.1086/340590.
- ^ "2 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-12.
- ^ a b Chini, R.; et al. (2012). "A spectroscopic survey on the multiplicity of high-mass stars". Monthly Notices of the Royal Astronomical Society. 424 (3): 1925–1929. arXiv: 1205.5238. Bibcode: 2012MNRAS.424.1925C. doi: 10.1111/j.1365-2966.2012.21317.x. S2CID 119120749.
- ^ Roberts, Lewis C. Jr. (May 2011). "Astrometric and photometric measurements of binary stars with adaptive optics: observations from 2002". Monthly Notices of the Royal Astronomical Society. 413 (2): 1200–1205. arXiv: 1012.3383. Bibcode: 2011MNRAS.413.1200R. doi: 10.1111/j.1365-2966.2011.18205.x. S2CID 118398949.
- ^ Balona, L. A. (December 1995). "Tests of the Pulsation and Starspot Models for the Periodic Be-Stars". Monthly Notices of the Royal Astronomical Society. 277 (4): 1547. Bibcode: 1995MNRAS.277.1547B. doi: 10.1093/mnras/277.4.1547.
- ^ Lynds, C. R. (1959). "The Light-Variability of Early B Giants". The Astrophysical Journal. 130: 577. Bibcode: 1959ApJ...130..577L. doi: 10.1086/146747.
- 2 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images