Gliese 829
| Observation data EpochJ2000.0EquinoxJ2000.0(ICRS) | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 21h29m36.81225s[1] |
| Declination | +17° 38′ 35.8542″[1] |
| Apparent magnitude(V) | 10.35[2] |
| Characteristics | |
| Spectral type | M3.0Ve[3] |
| U−Bcolor index | +1.31[2] |
| B−Vcolor index | +1.61[2] |
| Astrometry | |
| Radial velocity(Rv) | −25.0[4]km/s |
| Proper motion(μ) | RA:+1007.13[1]mas/yr Dec.:+377.27[1]mas/yr |
| Parallax(π) | 147.4958 ± 0.0257mas[5] |
| Distance | 22.113 ± 0.004ly (6.780 ± 0.001pc) |
| Orbit[6] | |
| Period(P) | 53.221±0.004 d |
| Eccentricity(e) | 0.374±0.004 |
| Periastronepoch(T) | 48980.2±0.2 JD |
| Argument of periastron(ω) (secondary) | 300±1° |
| Semi-amplitude(K1) (primary) | 18.7±0.1km/s |
| Semi-amplitude(K2) (secondary) | 18.7±0.1km/s |
| Details | |
| Surface gravity(logg) | 5.0[3]cgs |
| Temperature | 3,400[3]K |
| Metallicity[Fe/H] | −0.13[7]dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 829is a double-linedspectroscopic binary[6]system of twored dwarfstars in theconstellationofPegasus.They have a highproper motionof 1.08arc secondsper year along aposition angleof +69.58°.[9]Based uponparallax measurements,the stars are at a distance of about 22light yearsfrom theSun.[1]The system will make its closest approach to the Sun around 91,000 years from now when it achieves aperiheliondistance of 17.65 ly (5.410 pc).[4]
Characteristics
[edit]The primary star has a temp of 3400 K. It is an M3.0Ve star with a B-V color index of 1.61 and it is also called Ross 775. It has an app. mag. of 10.35.
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.
- ^abcIanna, P. A.; Whitman, W. R. (April 1984), "Parallaxes and proper motions from the McCormick Observatory List 45",Astronomical Journal,89:568–570,Bibcode:1984AJ.....89..568I,doi:10.1086/113550.
- ^abcLépine, Sébastien; et al. (2013), "A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky",The Astronomical Journal,145(4): 102,arXiv:1206.5991,Bibcode:2013AJ....145..102L,doi:10.1088/0004-6256/145/4/102,S2CID117144290.
- ^abBailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind",Astronomy & Astrophysics,575:13,arXiv:1412.3648,Bibcode:2015A&A...575A..35B,doi:10.1051/0004-6361/201425221,S2CID59039482,A35.
- ^Brown, A. G. A.;et al. (Gaia collaboration) (2021)."GaiaEarly Data Release 3: Summary of the contents and survey properties ".Astronomy & Astrophysics.649:A1.arXiv:2012.01533.Bibcode:2021A&A...649A...1G.doi:10.1051/0004-6361/202039657.S2CID227254300.(Erratum:doi:10.1051/0004-6361/202039657e).Gaia EDR3 record for this sourceatVizieR.
- ^abDelfosse, Xavier; et al. (April 1999), "New neighbours. I. 13 new companions to nearby M dwarfs",Astronomy and Astrophysics,344:897–910,arXiv:astro-ph/9812008,Bibcode:1999A&A...344..897D.
- ^Rojas-Ayala, Bárbara; et al. (April 2012)."Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs"(PDF).The Astrophysical Journal.748(2): 93.arXiv:1112.4567.Bibcode:2012ApJ...748...93R.doi:10.1088/0004-637X/748/2/93.S2CID41902340.Archived(PDF)from the original on 2021-01-29.Retrieved2018-09-29.
- ^"Ross 775".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2016-10-25.
{{cite web}}:CS1 maint: postscript (link) - ^Dawson, P. C.; De Robertis, M. M. (January 2005), "High Proper Motion Stars. IV. Radial Velocities of 166 Luyten Half-Second Stars",The Publications of the Astronomical Society of the Pacific,117(827): 1–12,Bibcode:2005PASP..117....1D,doi:10.1086/427790.
