9 Vulpeculae

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9 Vulpeculae
Vulpecula constellation map.svg
Red circle.svg
Location of 9 Vulpeculae (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Vulpecula
Right ascension 19h 34m 34.89705s [1]
Declination 19° 46′ 24.2423″ [1]
Apparent magnitude  (V)5.010±0.009 [2] (4.99 - 5.08) [3]
Characteristics
Spectral type B8 IIIn [4]
Apparent magnitude  (U)4.499±0.012 [2]
Apparent magnitude  (B)4.906±0.011 [2]
Variable type suspected [3]
Astrometry
Radial velocity (Rv)+5.00 [5]  km/s
Proper motion (μ)RA: +13.148 [1]   mas/yr
Dec.: +5.142 [1]   mas/yr
Parallax (π)5.8317 ± 0.1242  mas [1]
Distance 560 ± 10  ly
(171 ± 4  pc)
Absolute magnitude  (MV)−1.14 [6]
Details
Mass 3.5 [7]   M☉
Radius 2.8 [8]   R☉
Luminosity 216 [8]   L☉
Surface gravity (log g)3,54 [7]   cgs
Temperature 12,042 [7]   K
Metallicity [Fe/H]−0.03 [7]   dex
Rotational velocity (v sin i)185 [9]  km/s
Age 185 [10]   Myr
Other designations
9 Vul, NSV  12173, BD+19°4063, GC  27047, HD  184606, HIP  96275, HR  7437, SAO  104990, WDS J19346+1946A [11]
Database references
SIMBAD data

9 Vulpeculae is a star in the northern constellation of Vulpecula, located about 560 light years away based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.01. The star is moving further from the Earth with a heliocentric radial velocity of +5 km/s.

This a B-type star with a stellar classification of B8 IIIn, [4] where the 'n' notation indicates "nebulous" lines due to rapid rotation. It has a high rate of spin with a projected rotational velocity of 185 km/s. [9] The star is radiating 216 times the Sun's luminosity from its photosphere at an effective temperature of 12,042  K . This is a suspected variable star of unknown type, ranging in magnitude from 4.99 down to 5.08. [3]

9 Vulpeculae has two reported companions: component B, with a separation of 9.3" and magnitude 13.4, and C, with a separation of 108" and a magnitude of 12.5". [12] [4] Both are unrelated background objects. [13] [14]

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References

  1. 1 2 3 4 5 Gaia Collaboration; et al. (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID   244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 3 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.
  3. 1 2 3 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  4. 1 2 3 Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . Vizier catalog entry
  5. ↑ 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.
  6. ↑ 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. Vizier catalog entry
  7. 1 2 3 4 Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . ISSN   0004-6361.
  8. 1 2 Stassun, Keivan G.; et al. (September 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv: 1706.00495 . Bibcode:2018AJ....156..102S. doi: 10.3847/1538-3881/aad050 . ISSN   0004-6256.
  9. 1 2 Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi: 10.1086/340590 .
  10. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814 . Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID   118345778. Vizier catalog entry
  11. ↑ "9 Vul". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-03-14.
  12. ↑ Dommanget, J.; Nys, O. (2002). "VizieR Online Data Catalog: CCDM (Catalog of Components of Double & Multiple stars) (Dommanget+ 2002)". VizieR On-line Data Catalog: I/274. Originally Published in: Observations et Travaux 54. 1274. Bibcode:2002yCat.1274....0D. Vizier catalog entry
  13. ↑ Gaia Collaboration; et al. (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID   244398875. Gaia DR3 record for this source at VizieR .
  14. ↑ Gaia Collaboration; et al. (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID   244398875. Gaia DR3 record for this source at VizieR .
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