HD 127726
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h32m20.22613s[1] |
| Declination | +26° 40′ 38.224″[1] |
| Apparent magnitude(V) | 5.88[2](6.61 + 7.08)[3] |
| Characteristics | |
| Spectral type | A7Vn + F0[4] |
| U−Bcolor index | +0.08[2] |
| B−Vcolor index | +0.21[2] |
| Astrometry | |
| Radial velocity(Rv) | −4[5]km/s |
| Proper motion(μ) | RA:−69.68[1]mas/yr Dec.:−21.90[1]mas/yr |
| Parallax(π) | 13.58 ± 0.69mas[1] |
| Distance | 240 ± 10ly (74 ± 4pc) |
| Absolute magnitude(MV) | 2.27 + 2.74[4] |
| Orbit[6] | |
| Period(P) | 29.93yr |
| Semi-major axis(a) | 0.200″ |
| Eccentricity(e) | 0.160 |
| Inclination(i) | 158.0° |
| Longitude of the node(Ω) | 23.3° |
| Periastronepoch(T) | B1983.85 |
| Argument of periastron(ω) (secondary) | 57.0° |
| Details | |
| Luminosity | 16.4[7]L☉ |
| Temperature | 7,246[7]K |
| Rotational velocity(vsini) | 222[8]km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 127726is abinary starsystem in the northernconstellationofBoötes.The pair consist of a rapidly-rotatingA-type main-sequence starand a fainter F-type companion, orbiting each other with aperiodof 29.93 years and anorbital eccentricity(ovalness) of 0.16. They have a combinedapparent visual magnitudeof 5.88, which is bright enough to be dimly visible to the naked eye. The system is located at a distance of approximately 240light yearsfrom theSun.
References
[edit]- ^abcdevan 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,S2CID18759600.
- ^abcMermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data. SIMBAD,Bibcode:1986EgUBV........0M.
- ^Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries",Astronomy & Astrophysics,546:5,Bibcode:2012A&A...546A..69M,doi:10.1051/0004-6361/201219774,A69
- ^abCvetkovic, Z.; Ninkovic, S. (2010), "On the Component Masses of Visual Binaries",Serbian Astronomical Journal,180(180): 71–80,Bibcode:2010SerAJ.180...71C,doi:10.2298/SAJ1080071C
- ^Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), "The Revision of the General Catalogue of Radial Velocities",Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30,vol. 30, University of Toronto:International Astronomical Union,p. 57,Bibcode:1967IAUS...30...57E
- ^"Sixth Catalog of Orbits of Visual Binary Stars".United States Naval Observatory.Archived fromthe originalon 1 August 2017.Retrieved21 May2017.
- ^abMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars",Monthly Notices of the Royal Astronomical Society,427(1): 343–57,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID118665352
- ^Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions",Astronomy and Astrophysics,463(2): 671–682,arXiv:astro-ph/0610785,Bibcode:2007A&A...463..671R,doi:10.1051/0004-6361:20065224,S2CID18475298
External links
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