GX Velorum

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GX Velorum
Vela constellation map.svg
Red circle.svg

Location of GX Velorum (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 09h 11m 04.39853s[1]
Declination −44° 52′ 04.4429″[1]
Apparent magnitude (V) +5.00[2] (4.97 - 5.04[3])
Spectral type B5 Ia[4]
U−B color index −0.57[2]
B−V color index +0.22[2]
Variable type α Cyg?[3]
Radial velocity (Rv) 28.20[5] km/s
Proper motion (μ) RA: −4.92 ± 0.31[1] mas/yr
Dec.: 4.75 ± 0.26[1] mas/yr
Parallax (π) 0.69 ± 0.29[1] mas
Distance 1,585[6] pc
Absolute magnitude (MV) −7.20[7]
Mass 35[4] M
Radius 61[8] R
Surface gravity (log g) 2.00[4] cgs
Temperature 15,100[4] K
Rotational velocity (v sin i) 39[4] km/s
Age 8.3[9] Myr
Other designations
GX Vel, HR 3654, HD 79186, CD−44°5206, HIP 45085
Database references

GX Velorum (GX Vel) is a blue supergiant variable star in the constellation Vela. Its apparent magnitude is 5.0. It is an α Cygni pulsating variable.


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c 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. 
  3. ^ a b 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. ^ a b c d e Fraser, M.; Dufton, P. L.; Hunter, I.; Ryans, R. S. I. (2010). "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants". Monthly Notices of the Royal Astronomical Society. 404: 1306. arXiv:1001.3337Freely accessible. Bibcode:2010MNRAS.404.1306F. doi:10.1111/j.1365-2966.2010.16392.x. 
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  6. ^ Denoyelle, J. (1977). "The spatial distribution of young stars in Vela (l = 257 to 284 )". Astronomy and Astrophysics. 27: 343. Bibcode:1977A&AS...27..343D. 
  7. ^ Reed, B. Cameron (2000). "Vela OB1: Probable New Members and Hertzsprung-Russell Diagram". The Astronomical Journal. 119 (4): 1855. Bibcode:2000AJ....119.1855R. doi:10.1086/301313. 
  8. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.