  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vulpecula1 |
| Right ascension | 19h 26m 13.2463s2 |
| Declination | +20° 05′ 51.8394″2 |
| Apparent magnitude (V) | 5.65±0.0103 |
| Characteristics | |
| Evolutionary stage | main sequence4 |
| Spectral type | A0 V4 |
| Apparent magnitude (U) | 5.62±0.0123 |
| Apparent magnitude (B) | 5.66±0.0113 |
| Astrometry | |
| Radial velocity (Rv) | −20.9±2.95 km/s |
| Proper motion (μ) | RA: +3.395±0.1142 mas/yr Dec.: −34.787±0.1372 mas/yr |
| Parallax (π) | 13.8921±0.0900 mas2 |
| Distance | 235 ± 2 ly (72.0 ± 0.5 pc) |
| Absolute magnitude (MV) | 1.291 |
| Details4 | |
| Mass | 2.33±0.02 M☉ |
| Radius | 2.76 R☉ |
| Luminosity | 34±2 L☉ |
| Surface gravity (log g) | 4.07 cgs |
| Temperature | 9,840+91 −90 K |
| Rotational velocity (v sin i) | 154 km/s |
| Age | 1987 Myr |
| Other designations | |
| 5 Vul, BD+19°4015, HD 182919, HIP 95560, HR 7390, SAO 1048318 | |
| Database references | |
| SIMBAD | data |
5 Vulpeculae is a single,9 white-hued star in the northern constellation of Vulpecula.8 It is situated amidst a random concentration of bright stars designated Collinder 399,10 or Brocchi's Cluster. This is a faint star that is just visible to the naked eye with an apparent visual magnitude of 5.60.5 Based upon an annual parallax shift of 13.8921±0.0900 mas,2 it is located around 235 light years from the Sun. It is moving closer with a heliocentric radial velocity of −21 km/s,5 and will make its closest approach in 2.5 million years at a separation of around 120 ly (36.89 pc).1
This is a young A-type main-sequence star with a stellar classification of A0 V.4 It is a rapidly rotating star11 with a projected rotational velocity of 154 km/s.4 The star has an estimated 2.334 times the mass of the Sun and about 2.76 times the Sun's radius. It is radiating 34 times the Sun's luminosity from its photosphere at an effective temperature of 8,940 K.4
A warm debris disk was detected by the Spitzer Space Telescope at a temperature of 206 K (−89 °F; −67 °C), orbiting 13 Astronomical units from the host star.12 Although this finding has not been directly detected, the emission signature indicates the disk is in the form of a thin ring. The emission displays weak transient absorption features that are indicative of kilometer-sized exocomets that are undergoing evaporation as they approach the host star.11 These absorption features have been observed to vary on time scales of hours, days, or months.13
References
References
- 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. XHIP record for this object at VizieR.
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Harmanec, P.; et al. (2020). "A new study of the spectroscopic binary 7 Vul with a Be star primary". Astronomy and Astrophysics. 639. Table A.1. arXiv:2005.11089. Bibcode:2020A&A...639A..32H. doi:10.1051/0004-6361/202037964. S2CID 218862853.
- Zorec, J.; Royer, F. (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.
- 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.
- Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (3rd ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- Chen, Christine H.; et al. (2014), "The Spitzer Infrared Spectrograph Debris Disk Catalog. I. Continuum Analysis of Unresolved Targets", The Astrophysical Journal Supplement, 211 (3): 22, Bibcode:2014ApJS..211...25C, doi:10.1088/0067-0049/211/2/25, 25.
- "5 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-04-13.
- 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.
- Baumgardt, H. (December 1998), "The nature of some doubtful open clusters as revealed by HIPPARCOS", Astronomy and Astrophysics, 340: 402–414, Bibcode:1998A&A...340..402B.
- Montgomery, Sharon L.; Welsh, Barry Y. (October 2012), "Detection of Variable Gaseous Absorption Features in the Debris Disks Around Young A-type Stars", Publications of the Astronomical Society of the Pacific, 124 (920): 1042, Bibcode:2012PASP..124.1042M, doi:10.1086/668293
- Morales, Farisa Y.; et al. (2009), "Spitzer mid-Ir Spectra of Dust Debris Around A and Late B Type Stars: Asteroid Belt Analogs and Power-Law Dust Distributions" (PDF), The Astrophysical Journal, 699 (2): 1067–1086, Bibcode:2009ApJ...699.1067M, doi:10.1088/0004-637X/699/2/1067, S2CID 45235873.
- Montgomery, Sharon L.; Welsh, B.; Lallement, R.; Timbs, B. W. (January 2014), "Exocomet Gas: Now You See It, Now You Don't", American Astronomical Society, AAS Meeting #223, 223: 401.02, Bibcode:2014AAS...22340102M, 401.02.
External links
External links
- 5 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images