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13 Vulpeculae is a blue giant with a stellar classification of class B9.5III[4] in the northern constellation Vulpecula. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 4.57[4] and it is approximately 339 light years away from the Sun based on parallax. The star is radiating 180[4] times the luminosity of the Sun from its photosphere at an effective temperature of 8,801 K.[8]

13 Vulpeculae
Location of 13 Vulpeculae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Vulpecula
13 Vulpeculae A
Right ascension 19h 53m 27.6957s[1]
Declination 24° 04′ 46.608″[1]
Apparent magnitude (V) 4.584±0.008[2]
13 Vulpeculae B
Right ascension 19h 53m 27.6102s[3]
Declination 24° 04′ 46.077″[3]
Apparent magnitude (V)
Characteristics
Spectral type B9.5III[4]
Apparent magnitude (U) 4.404±0.012[2]
Apparent magnitude (B) 4.536±0.010[2]
Astrometry
13 Vulpeculae A
Radial velocity (Rv)−28.10[5] km/s
Proper motion (μ) RA: 22.325±0.065[1] mas/yr
Dec.: 36.510±0.072[1] mas/yr
Parallax (π)9.6342 ± 0.0902 mas[1]
Distance339 ± 3 ly
(103.8 ± 1.0 pc)
Absolute magnitude (MV)−0.48[4]
13 Vulpeculae B
Proper motion (μ) RA: 14.037±0.135[3] mas/yr
Dec.: 32.954±0.131[3] mas/yr
Parallax (π)9.8828 ± 0.1524 mas[3]
Distance330 ± 5 ly
(101 ± 2 pc)
Orbit[6]
Period (P)615.25±104.12 yr
Semi-major axis (a)1.555±0.241″
Eccentricity (e)0.079±0.042
Inclination (i)85.9±1.5°
Longitude of the node (Ω)68.1±0.3°
Periastron epoch (T)2027.82±94.79
Argument of periastron (ω)
(secondary)		169.7±4.4°
Details
13 Vul A
Radius1.3[7] R☉
Luminosity180[4] L☉
Temperature8,801[8] K
Metallicity [Fe/H]−0.11[4] dex
Rotational velocity (v sin i)45.0[9] km/s
Other designations
13 Vul, BD+23°3820, GC 27544, HD 188260, HIP 97886, HR 7592, SAO 87883, CCDM J19535+2405AB, WDS J19535+2405AB, 2MASS J19532768+2404464[10]
Database references
SIMBADdata

There is one reported companion, designated component B, with a magnitude of 7.37, an orbital period of roughly 615 years, and an angular separation of 1.55″.[11] The system is moving closer to the Earth with a heliocentric radial velocity of −28 km/s.[5]


References


  1. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 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. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  4. 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
  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. Hartkopf, W. I.; et al. (June 30, 2006), Sixth Catalog of Orbits of Visual Binary Stars, United States Naval Observatory, retrieved 2017-06-02.
  7. Pasinetti Fracassini, L. E.; et al. (February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics (Third ed.). 367 (2): 521–524. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
  8. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352. Vizier catalog entry
  9. Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G. 3244. Bibcode:2005yCat.3244....0G. Vizier catalog entry
  10. "13 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-15.
  11. Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. Vizier catalog entry



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