HD 125040
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h16m32.84326s[1] |
| Declination | +20° 07′ 18.6591″[1] |
| Apparent magnitude(V) | 6.25[2] |
| Characteristics | |
| Spectral type | F8V[3] |
| B−Vcolor index | +0.488[2] |
| Astrometry | |
| Radial velocity(Rv) | −7.20±0.55[4]km/s |
| Proper motion(μ) | RA:−135.85±0.57[1]mas/yr Dec.:−93.28±0.46[1]mas/yr |
| Parallax(π) | 30.65 ± 0.64mas[1] |
| Distance | 106 ± 2ly (32.6 ± 0.7pc) |
| Absolute magnitude(MV) | 3.69±0.05[5] |
| Orbit[6] | |
| Period(P) | 956.6±299.4yr |
| Semi-major axis(a) | 3.75±0.75" (122.3±24.4AU) |
| Eccentricity(e) | 0.53±0.08 |
| Inclination(i) | 134.3±6.9° |
| Longitude of the node(Ω) | 14.1±10.4° |
| Periastronepoch(T) | 1683.9±14.2 |
| Argument of periastron(ω) (secondary) | 72.2±18.5° |
| Details | |
| Mass | 1.23[7]M☉ |
| Luminosity | 2.57[7]L☉ |
| Surface gravity(logg) | 4.28[7]cgs |
| Temperature | 6,223[5]K |
| Metallicity[Fe/H] | 0.05[5]dex |
| Rotational velocity(vsini) | 38.0[7]km/s |
| Age | 2.5+0.6 −0.7[5]Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 125040is a visualbinary starsystem in the northernconstellationofBoötes.It appears as a dim point of light near the lower limit of perception with the naked eye, having a combinedapparent visual magnitudeof 6.25.[2]The system is located at a distance of approximately 106light yearsfrom theSunbased onparallaxmeasurements,[1]but is drifting closer with aradial velocityof −7 km/s.[4]It has a highproper motion,traversing thecelestial sphereat anangular rateof0.164 arcseconds yr−1.[9]
This was first reported to be a double byJ. F. W. Herschelin 1830. The stars orbit each other with asemi-major axisof122AU,aperiodof roughly 956.6 years, and aneccentricityof 0.53. They have a combined mass about double that of the Sun.[6]The primary component is anF-type main-sequence starwith astellar classificationof F8V.[3]The system is a source forX-rayemission.[10]
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.Vizier catalog entry
- ^abcHäggkvist, L.; Oja, T. (1969), "Photoelectric BV photometry of 368 northern stars",Arkiv för Astronomi,5:125–135,Bibcode:1969ArA.....5..125H.
- ^abHarlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II",Astronomical Journal,75(2): 165–166,Bibcode:1970AJ.....75..165H,doi:10.1086/110956.
- ^abValenti, Jeff A.; Fischer, Debra A. (July 2005), "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs",The Astrophysical Journal Supplement Series,159(1): 141–166,Bibcode:2005ApJS..159..141V,doi:10.1086/430500.
- ^abcdHolmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics",Astronomy and Astrophysics,501(3): 941–947,arXiv:0811.3982,Bibcode:2009A&A...501..941H,doi:10.1051/0004-6361/200811191,S2CID118577511.
- ^abKiyaeva, O. V.; et al. (May 2017), "New orbits of wide visual double stars",Astronomy Letters,43(5): 316–331,Bibcode:2017AstL...43..316K,doi:10.1134/S1063773717040041,S2CID255196353.
- ^abcdLuck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants",The Astronomical Journal,153(1): 19,arXiv:1611.02897,Bibcode:2017AJ....153...21L,doi:10.3847/1538-3881/153/1/21,S2CID119511744,21.
- ^"HD 125040".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2014-10-02.
- ^Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) ",The Astronomical Journal,129(3): 1483–1522,arXiv:astro-ph/0412070,Bibcode:2005AJ....129.1483L,doi:10.1086/427854,S2CID2603568.
- ^Schwope, A.; et al. (2000), "The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s−1",Astronomische Nachrichten,321(1): 1–52,arXiv:astro-ph/0003039,Bibcode:2000AN....321....1S,doi:10.1002/(SICI)1521-3994(200003)321:1<1::AID-ASNA1>3.0.CO;2-C.
