15 Draconis
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 16h27m59.01603s[1] |
| Declination | +68° 46′ 05.3051″[1] |
| Apparent magnitude(V) | 4.94[2] |
| Characteristics | |
| Spectral type | A0 III[3] |
| B−Vcolor index | −0.051±0.006[2] |
| Astrometry | |
| Radial velocity(Rv) | −6.7±2.8[2]km/s |
| Proper motion(μ) | RA:−24.818[1]mas/yr Dec.:+33.623[1]mas/yr |
| Parallax(π) | 7.2102 ± 0.1296mas[1] |
| Distance | 452 ± 8ly (139 ± 2pc) |
| Absolute magnitude(MV) | −0.93[2] |
| Details | |
| Radius | 3.3[4]R☉ |
| Luminosity | 285.53[2]L☉ |
| Surface gravity(logg) | 3.4[5]cgs |
| Temperature | 9,980[5]K |
| Rotational velocity(vsini) | 154[6]km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
15 Draconisis a single[8]starin the northerncircumpolar constellationofDraco,located 452light yearsaway from the Sun.15 Draconisis theFlamsteed designation;it also has theBayer designationA Draconis.[9]This object is visible to the naked eye as a white-hued star with anapparent visual magnitudeof 4.94.[2]It is moving closer to the Earth with a heliocentricradial velocityof −7 km/s.[2]
This star has astellar classificationof A0 III,[3]matching that of anA-typegiant star.It has a relatively high rate of spin with aprojected rotational velocityof 154 km/s.[6]The star is radiating 286[2]times theSun's luminosityfrom itsphotosphereat aneffective temperatureof 9,980 K.[5]
References
[edit]- ^abcdeBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData 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.
- ^abcdefghAnderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".Astronomy Letters.38(5): 331.arXiv:1108.4971.Bibcode:2012AstL...38..331A.doi:10.1134/S1063773712050015.S2CID119257644.
- ^abCowley, A. (November 1972), "Spectral classification of the bright B8 stars",Astronomical Journal,77:750–755,Bibcode:1972AJ.....77..750C,doi:10.1086/111348.
- ^Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)",Astronomy and Astrophysics,367(Third ed.): 521–524,arXiv:astro-ph/0012289,Bibcode:2001A&A...367..521P,doi:10.1051/0004-6361:20000451,S2CID425754.
- ^abcBaines, E.; et al. (December 2017), "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer",The Astronomical Journal,155(1): 30,arXiv:1712.08109,Bibcode:2018AJ....155...30B,doi:10.3847/1538-3881/aa9d8b,S2CID119427037.
- ^abRoyer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i",Astronomy and Astrophysics,393:897–911,arXiv:astro-ph/0205255,Bibcode:2002A&A...393..897R,doi:10.1051/0004-6361:20020943,S2CID14070763
- ^"HD 40409".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2018-07-16.
- ^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,S2CID14878976.
- ^Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)".VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002).4027.Bibcode:2004yCat.4027....0K.
