Astronomy:HD 1606

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Short description: Star in the constellation Andromeda
HD 1606
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda
Right ascension  00h 20m 24.40107s[1]
Declination +30° 56′ 08.2099″[1]
Apparent magnitude (V) 5.869[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B7V[4]
U−B color index −0.45[5]
B−V color index −0.10[5]
Variable type Suspected[6]
Astrometry
Radial velocity (Rv)3.8[7] km/s
Proper motion (μ) RA: 15.734±0.159[1] mas/yr
Dec.: −2.957±0.125[1] mas/yr
Parallax (π)5.5900 ± 0.1069[1] mas
Distance580 ± 10 ly
(179 ± 3 pc)
Absolute magnitude (MV)−0.5[8]
Details
Mass3.75±0.08[3] M☉
Radius2.9[9] R☉
Luminosity245+36
−31[3] L☉
Surface gravity (log g)3.988±0.017[10] cgs
Temperature13,186±100[10] K
Rotational velocity (v sin i)113±8[10] km/s
Other designations
NSV 128, BD+30°42, GC 408, HD 1606, HIP 1630, HR 78, SAO 53820, PPM 65213[11]
Database references
SIMBADdata

HD 1606 is a single[12] star in the northern constellation of Andromeda, positioned a few degrees to the northeast of the bright star Alpheratz. It has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.87.[2] Although it is suspected of variability, none has been conclusively found.[13] The star is located at a distance of approximately 580 light-years (179 parsecs) from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +4 km/s.[7] It has an absolute magnitude of −0.5.[8]

This is a B-type main-sequence star with a stellar classification of B7V,[4] which means it is currently generating energy through hydrogen fusion at its core. It has 3.75[3] times the mass of the Sun and a fairly high rate of spin, showing a projected rotational velocity of 113 km/s.[10] The star is radiating 245[3] times the luminosity of the Sun from its photosphere at an effective temperature of 13,186 K.[10]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Zorec, J. et al. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Cowley, A. (1972). "Spectral classification of the bright B8 stars". The Astronomical Journal 77: 750. doi:10.1086/111348. Bibcode: 1972AJ.....77..750C. 
  5. ↑ 5.0 5.1 Hamdy, M. A. et al. (1993). "A catalogue of spectral classification and photometric data of B-type stars". Astrophysics and Space Science 203 (1): 53–107. doi:10.1007/BF00659414. Bibcode: 1993Ap&SS.203...53H. 
  6. ↑ Samus, N. N. et al. (2009). "General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1. Bibcode: 2009yCat....102025S. 
  7. ↑ 7.0 7.1 Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institute of Washington D.C.). Bibcode: 1953GCRV..C......0W. 
  8. ↑ 8.0 8.1 Eggen, O. J. (1977). "Is star formation bimodal ? II. The nearest early-type stars". Publications of the Astronomical Society of the Pacific 89: 187. doi:10.1086/130099. Bibcode: 1977PASP...89..187E. 
  9. ↑ Pasinetti Fracassini, L. E. et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics 367 (2): 521. doi:10.1051/0004-6361:20000451. Bibcode: 2001A&A...367..521P. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 Huang, Wenjin et al. (2010). "A Stellar Rotation Census of B Stars: From Zams to Tams". The Astrophysical Journal 722 (1): 605–619. doi:10.1088/0004-637X/722/1/605. Bibcode: 2010ApJ...722..605H. 
  11. ↑ "HD 1606". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+1606. 
  12. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E. 
  13. ↑ BSJ (4 January 2010). "NSV 128". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=38752. 



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