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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[1] |
| Distance | 580 ± 10 ly (179 ± 3 pc) |
| Absolute magnitude (MV) | −0.5[8] |
| Details | |
| Mass | 3.75±0.08[3] M☉ |
| Radius | 2.9[9] R☉ |
| Luminosity | 245+36 −31[3] L☉ |
| Surface gravity (log g) | 3.988±0.017[10] cgs |
| Temperature | 13,186±100[10] K |
| Rotational velocity (v sin i) | 113±8[10] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
edit- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b 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.
- ^ a b c d e Zorec, J.; et al. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.
- ^ a b Cowley, A. (1972). "Spectral classification of the bright B8 stars". The Astronomical Journal. 77: 750. Bibcode:1972AJ.....77..750C. doi:10.1086/111348.
- ^ a b 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. Bibcode:1993Ap&SS.203...53H. doi:10.1007/BF00659414. S2CID 122459090.
- ^ Samus, N. N.; Durlevich, O. V.; 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.
- ^ a b 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.
- ^ a b 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.
- ^ Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)". Astronomy and Astrophysics. 367 (2) (Third ed.): 521. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
- ^ a b c d e Huang, Wenjin; et al. (2010). "A Stellar Rotation Census of B Stars: From Zams to Tams". The Astrophysical Journal. 722 (1): 605–619. arXiv:1008.1761. Bibcode:2010ApJ...722..605H. doi:10.1088/0004-637X/722/1/605. S2CID 118532653.
- ^ "HD 1606". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-07-06.
- ^ 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. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ BSJ (4 January 2010). "NSV 128". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 December 2013.