V1073 Scorpii

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V1073 Scorpii
Scorpius constellation map.svg
Red circle.svg

Location of V1073 Scorpii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 17h 04m 49.35227s[1]
Declination −34° 07′ 22.5483″[1]
Apparent magnitude (V) +4.87[2]
Spectral type B0.7 Ia[3]
U−B color index −0.69[2]
B−V color index +0.26[2]
Variable type α Cyg[4]
Radial velocity (Rv) 7.00[5] km/s
Proper motion (μ) RA: −1.60 ± 0.33[1] mas/yr
Dec.: −3.28 ± 0.23[1] mas/yr
Parallax (π) 0.70 ± 0.29[1] mas
Distance 2,510[6] pc
Absolute magnitude (MV) −6.8[7]
Mass 23[8] M
Radius 36.0[7] R
Luminosity 302,000[7] L
Surface gravity (log g) 2.70[8] cgs
Temperature 22,500[7] K
Rotational velocity (v sin i) 47[8] km/s
Age 4.2[9] Myr
Other designations
k Sco, V1073 Sco, HR 6334, HD 154090, CD−33°11706, HIP 83574, SAO 208377
Database references

V1073 Scorpii (V1073 Sco) is a variable star in the constellation Scorpius. It also has a non-Greek Bayer designation of k Scorpii.

V1073 Sco has a 14th magnitude companion.[10]

V1073 Sco is an α Cygni variable,[11] a supergiant which pulsates erratically on a timescale of days to weeks. The mean visual magnitude is 4.87 and its brightness changes at most by less than a tenth of a magnitude. A simplistic fitting of Hipparcos data suggests a periodicity of 1.6 days.[12][13]

V1073 Scorpii is a runaway star, moving at more than 37 km/s relative to its neighbourhood.[9] No bow shock has been detected.[14]


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. 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. ^ Kraus, M.; Borges Fernandes, M.; Kubát, J. (2009). "Parameters of galactic early B supergiants. The influence of the wind on the interstellar extinction determination". Astronomy and Astrophysics. 499: 291. Bibcode:2009A&A...499..291K. doi:10.1051/0004-6361/200810319. 
  4. ^ 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. 
  5. ^ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. Bibcode:2007AN....328..889K. arXiv:0705.0878Freely accessible. doi:10.1002/asna.200710776. 
  6. ^ Mel'Nik, A. M.; Efremov, Yu. N. (1995). "A new list of OB associations in our galaxy". Astronomy Letters. 21: 10. Bibcode:1995AstL...21...10M. 
  7. ^ a b c d Crowther, P. A.; Lennon, D. J.; Walborn, N. R. (2006). "Physical parameters and wind properties of galactic early B supergiants". Astronomy and Astrophysics. 446: 279. Bibcode:2006A&A...446..279C. arXiv:astro-ph/0509436Freely accessible. doi:10.1051/0004-6361:20053685. 
  8. ^ a b c 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. Bibcode:2010MNRAS.404.1306F. arXiv:1001.3337Freely accessible. doi:10.1111/j.1365-2966.2010.16392.x. 
  9. ^ a b 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. arXiv:1007.4883Freely accessible. doi:10.1111/j.1365-2966.2010.17434.x. 
  10. ^ 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. 
  11. ^ Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (1999). "The 74th Special Name-list of Variable Stars". Information Bulletin on Variable Stars. 4659: 1. Bibcode:1999IBVS.4659....1K. 
  12. ^ Koen, Chris; Eyer, Laurent (2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331: 45. Bibcode:2002MNRAS.331...45K. arXiv:astro-ph/0112194Freely accessible. doi:10.1046/j.1365-8711.2002.05150.x. 
  13. ^ Lefèvre, L.; Marchenko, S. V.; Moffat, A. F. J.; Acker, A. (2009). "A systematic study of variability among OB-stars based on HIPPARCOS photometry". Astronomy and Astrophysics. 507 (2): 1141. Bibcode:2009A&A...507.1141L. doi:10.1051/0004-6361/200912304. 
  14. ^ Peri, C. S.; Benaglia, P.; Brookes, D. P.; Stevens, I. R.; Isequilla, N. L. (2012). "E-BOSS: An Extensive stellar BOw Shock Survey. I. Methods and first catalogue". Astronomy & Astrophysics. 538: A108. Bibcode:2012A&A...538A.108P. arXiv:1109.3689Freely accessible. doi:10.1051/0004-6361/201118116.