HD 1606

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HD 1606
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension  00h 20m 24.402s[1]
Declination +30° 56′ 08.21″[1]
Apparent magnitude (V) 5.869[2]
Spectral type B7V[3]
U−B color index −0.45[4]
B−V color index −0.10[4]
Variable type Suspected[5]
Radial velocity (Rv)3.8[6] km/s
Proper motion (μ) RA: 14.13±0.37[1] mas/yr
Dec.: −1.05±0.24[1] mas/yr
Parallax (π)6.26 ± 0.38[1] mas
Distance520 ± 30 ly
(160 ± 10 pc)
Absolute magnitude (MV)−0.5[7]
Mass3.7[8] M
Radius2.9[9] R
Surface gravity (log g)3.988[8] cgs
Temperature13,186[8] K
Rotational velocity (v sin i)113[8] km/s
Other designations
2MASS J00202438+3056082, TYC 2261-1522-1, AG+30° 32, GSC 02261-01522, NSV 128, UBV M 7309, BD+30 42, HD 1606, PPM 65213, UBV 239, SAO 53820, uvby98 100001606, GC 408, HIP 1630, YZ 30 142, GCRV 186, HR 78, TD1 164.[6]
Database references

HD 1606 is a star in the constellation Andromeda. Although it is suspected of variability, none has been conclusively found, and its apparent magnitude has not been shown to vary from 5.88.[10] Located around 160 parsecs (520 ly) away, the star is a blue main-sequence star of spectral type B7V,[6] a massive star that is currently fusing its core hydrogen.


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  3. ^ Cowley, A (1972). "Spectral classification of the bright B8 stars". The Astronomical Journal. 77: 750. Bibcode:1972AJ.....77..750C. doi:10.1086/111348.
  4. ^ a b Hamdy, M. A.; Abo Elazm, M. S.; Saad, S. M. (1993). "A catalogue of spectral classification and photometric data of B-type stars". Astrophysics and Space Science. 203: 53–107. Bibcode:1993Ap&SS.203...53H. doi:10.1007/BF00659414.
  5. ^ 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.
  6. ^ a b c "HR 78". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 15 February 2014.
  7. ^ Eggen, O. J. (1977). "Is star formation bimodal ? II. The nearest early-type stars". Publications of the Astronomical Society of the Pacific. 89: 187. Bibcode:1977PASP...89..187E. doi:10.1086/130099.
  8. ^ a b c d Huang, Wenjin; Gies, D. R.; McSwain, M. V. (2010). "A Stellar Rotation Census of B Stars: From Zams to Tams". The Astrophysical Journal. 722: 605–619. arXiv:1008.1761. Bibcode:2010ApJ...722..605H. doi:10.1088/0004-637X/722/1/605.
  9. ^ Pasinetti Fracassini, L. E.; Pastori, L; Covino, S; Pozzi, A (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition -Comments and statistics". Astronomy and Astrophysics. 367 (2): 521. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
  10. ^ BSJ (4 January 2010). "NSV 128". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 December 2013.