Gliese 829: Difference between revisions

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{{Short description|Star system in the constellation Pegasus}}
{{Starbox begin
{{Starbox begin
| name = Gliese 829
| name = Gliese 829
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| prop_mo_ra = +1007.13<ref name=vanLeeuwen2007/>
| prop_mo_ra = +1007.13<ref name=vanLeeuwen2007/>
| prop_mo_dec = +377.27<ref name=vanLeeuwen2007/>
| prop_mo_dec = +377.27<ref name=vanLeeuwen2007/>
| parallax = 149.15
| parallax = 147.4958
| p_error = 1.81
| p_error = 0.0257
| parallax_footnote = <ref name=vanLeeuwen2007/>
| parallax_footnote = <ref name="GaiaEDR3">{{Cite Gaia EDR3|1784473016438653056}}</ref>
| absmag_v=
| absmag_v=
}}
}}
{{Starbox orbit
{{Starbox orbit
| reference = <ref name=Delfosse1999/>
| reference = <ref name="Delfosse1999" />
| period_unitless = {{Val|53.221|0.004|u=days}}
| period_unitless = {{Val|53.221|0.004|u=days}}
| axis = <!--Semimajor axis (in arcseconds)-->
| axis = <!--Semimajor axis (in arcseconds)-->
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}}
}}
{{Starbox end}}
{{Starbox end}}
'''Gliese 829''' is a double-lined [[spectroscopic binary]]<ref name=Delfosse1999/> system of two [[red dwarf]] stars in the [[constellation]] of [[Pegasus (constellation)|Pegasus]]. They have a high [[proper motion]] of 1.08&nbsp;[[arcsecond]]s per year along a [[position angle]] of +69.58°.<ref name=Dawson2005/> Based upon [[stellar parallax|parallax measurements]], the stars are at a distance of about 22&nbsp;[[light year]]s from the [[Sun]].<ref name=vanLeeuwen2007/> The system will make its closest approach to the Sun around 91,000 years from now when it achieves a [[perihelion]] distance of {{Convert|5.410|pc|ly|lk=off|abbr=on|order=flip}}.<ref name=Bailer-Jones2015/>
'''Gliese 829''' is a double-lined [[spectroscopic binary]]<ref name="Delfosse1999" /> system of two [[red dwarf]] stars in the [[constellation]] of [[Pegasus (constellation)|Pegasus]]. They have a high [[proper motion]] of 1.08&nbsp;[[arcsecond|arc second]]s per year along a [[position angle]] of +69.58°.<ref name=Dawson2005/> Based upon [[stellar parallax|parallax measurements]], the stars are at a distance of about 22&nbsp;[[light year]]s from the [[Sun]].<ref name=vanLeeuwen2007/> The system will make its closest approach to the Sun around 91,000 years from now when it achieves a [[perihelion]] distance of {{Convert|5.410|pc|ly|lk=off|abbr=on|order=flip}}.<ref name=Bailer-Jones2015/>

== Characteristics ==
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==
==References==
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| postscript=. }}</ref>
| postscript=. }}</ref>


<ref name=Delfosse1999>{{citation
<ref name="Delfosse1999">{{citation
⚫
| bibcode=1999A&A...344..897D
| title=New neighbours. I. 13 new companions to nearby M dwarfs
| title=New neighbours. I. 13 new companions to nearby M dwarfs
| display-authors=1
| display-authors=1
| last1=Delfosse | first1=X. | last2=Forveille | first2=T.
| last1=Delfosse | first1=Xavier | last2=Forveille | first2=Thierry
| last3=Beuzit | first3=J.-L. | last4=Udry | first4=S.
| last3=Beuzit | first3=Jean-Luc | last4=Udry | first4=Stéphane
| last5=Mayor | first5=M. | last6=Perrier | first6=C.
| last5=Mayor | first5=Michel | last6=Perrier | first6=Christian
| journal=Astronomy and Astrophysics
| journal=Astronomy and Astrophysics
| volume=344 | pages=897–910 | date=April 1999
| volume=344 | pages=897–910 | date=April 1999
⚫
| bibcode=1999A&A...344..897D
| arxiv=astro-ph/9812008 | postscript=. }}</ref>
| arxiv=astro-ph/9812008 | postscript=. }}</ref>


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{{Pegasus (constellation)}}
{{Pegasus (constellation)}}


{{DEFAULTSORT:Gliese 829}}
[[Category:Gliese and GJ objects|0829]]
[[Category:Gliese and GJ objects|0829]]
[[Category:Pegasus (constellation)]]
[[Category:Pegasus (constellation)]]
[[Category:M-type main-sequence stars|106106]]
[[Category:M-type main-sequence stars|106106]]
[[Category:Spectroscopic binaries]]
[[Category:Spectroscopic binaries]]
[[Category:Hipparcos objects|106106]]

Latest revision as of 22:19, 26 January 2022

Gliese 829
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pegasus
Right ascension 21h 29m 36.81225s[1]
Declination +17° 38′ 35.8542″[1]
Apparent magnitude (V) 10.35[2]
Characteristics
Spectral type M3.0Ve[3]
U−B color index +1.31[2]
B−V color 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 ± 0.0257 mas[5]
Distance22.113 ± 0.004 ly
(6.780 ± 0.001 pc)
Orbit[6]
Period (P)53.221±0.004 d
Eccentricity (e)0.374±0.004
Periastron epoch (T)48980.2±0.2 JD
Argument of periastron (ω)
(secondary)		300±1°
Semi-amplitude (K1)
(primary)		18.7±0.1 km/s
Semi-amplitude (K2)
(secondary)		18.7±0.1 km/s
Details
Surface gravity (log g)5.0[3] cgs
Temperature3,400[3] K
Metallicity [Fe/H]−0.13[7] dex
Other designations
HIP 106106, Ross 775.[8]
Database references
SIMBADdata
ARICNSdata

Gliese 829 is a double-lined spectroscopic binary[6] system of two red dwarf stars in the constellation of Pegasus. They have a high proper motion of 1.08 arc seconds per year along a position angle of +69.58°.[9] Based upon parallax measurements, the stars are at a distance of about 22 light years from the Sun.[1] The system will make its closest approach to the Sun around 91,000 years from now when it achieves a perihelion distance 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]

  1. ^ a b c d e van 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, S2CID 18759600.
  2. ^ a b c Ianna, 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.
  3. ^ a b c Lépine, 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, S2CID 117144290.
  4. ^ a b Bailer-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, S2CID 59039482, A35.
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early 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. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  6. ^ a b Delfosse, 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.
  7. ^ 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. S2CID 41902340.
  8. ^ "Ross 775". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-10-25.{{cite web}}: CS1 maint: postscript (link)
  9. ^ 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.
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