136 Tauri
 Location within Taurus | |
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h53m19.64606s[1] |
| Declination | +27° 36′ 44.1378″[1] |
| Apparent magnitude(V) | 4.56[2] |
| Characteristics | |
| Spectral type | A0 V[3](A0 V + A0 V)[2] |
| B−Vcolor index | −0.008±0.009[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity(Rv) | −17.2±4.2[5]km/s |
| Proper motion(μ) | RA:+3.72[1]mas/yr Dec.:−10.11[1]mas/yr |
| Parallax(π) | 7.71 ± 0.22mas[1] |
| Distance | 420 ± 10ly (130 ± 4pc) |
| Absolute magnitude(MV) | −1.00[2] |
| Orbit[6] | |
| Period(P) | 5.969 d |
| Eccentricity(e) | 0.00 |
| Periastronepoch(T) | 2,420,147.25±10.0 JD |
| Argument of periastron(ω) (secondary) | 0.00° |
| Semi-amplitude(K1) (primary) | 48.9 km/s |
| Semi-amplitude(K2) (secondary) | 71.0 km/s |
| Details | |
| 136 Tau A | |
| Radius | 2.1[7]R☉ |
| Luminosity | 197.19[8]L☉ |
| Temperature | 8,732[8]K |
| Rotational velocity(vsini) | 10[9]km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
136 Tauriis a white-huedbinary starsystem in thezodiacconstellationofTaurus.It has a combinedapparent visual magnitudeof 4.56,[2]which is bright enough to be faintly visible to the naked eye. Based upon an annualparallax shiftof7.71±0.22masas seen from Earth's orbit,[1]it is located approximately 420light yearsfrom the Sun. The system is moving nearer with a heliocentricradial velocityof −17.2 km/s,[5]and is expected to make its closest approach in 6.5 million years at a distance of 150 ly (45 pc).[2]
This is a close, double-linedspectroscopic binarywith anorbital periodof 5.96 days and aneccentricityof 0.00.[6]Tidal effectsbetween the pair may have circularized their orbit and slowed their rotation rates – the primary has aprojected rotational velocityof 10 km/s.[9]They have a combinedstellar classificationof A0 V,[3]and both are most likelyA-type main-sequence starsof the same class.[2]
References
[edit]- ^abcdefvan 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.
- ^abcdefgAnderson, 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.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications",Astronomical Journal,74:375–406,Bibcode:1969AJ.....74..375C,doi:10.1086/110819.
- ^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.
- ^abDe Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project",Astronomy & Astrophysics,546:A61,arXiv:1208.3048,Bibcode:2012A&A...546A..61D,doi:10.1051/0004-6361/201219219,S2CID59451347.
- ^abLuyten, W. J. (July 1936), "A rediscussion of the orbits of seventy-seven spectroscopic binaries",Astrophysical Journal,84:85,Bibcode:1936ApJ....84...85L,doi:10.1086/143751.
- ^Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)",Astronomy & Astrophysics,367(3rd ed.): 521–24,arXiv:astro-ph/0012289,Bibcode:2001A&A...367..521P,doi:10.1051/0004-6361:20000451,S2CID425754.
- ^abMcDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses ofHipparcosstars ",Monthly Notices of the Royal Astronomical Society,427(1): 343–357,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID118665352.
- ^abAbt, Helmut A.; Boonyarak, Chayan (November 2004), "Tidal Effects in Binaries of Various Periods",The Astrophysical Journal,616(1): 562–566,Bibcode:2004ApJ...616..562A,doi:10.1086/423795.
- ^"136 Tau".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2018-03-30.
