Astronomy:HD 207129

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Short description: Star in the constellation Grus
HD 207129
Location of HD 207129 (circled in red)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Grus[1]
Right ascension  21h 48m 15.7512s[2]
Declination −47° 18′ 13.018″[2]
Apparent magnitude (V) 5.57[1]
Characteristics
Evolutionary stage main sequence[3][2]
Spectral type G2V[1]
U−B color index +0.08[4]
B−V color index +0.60[4]
Astrometry
Radial velocity (Rv)−7.55±0.12[2] km/s
Proper motion (μ) RA: +165.069[2] mas/yr
Dec.: −295.553[2] mas/yr
Parallax (π)64.2717 ± 0.0430[2] mas
Distance50.75 ± 0.03 ly
(15.56 ± 0.01 pc)
Absolute magnitude (MV)+4.55[1]
Details
Mass1.06±0.01[5] M☉
Radius1.062±0.008[6] R☉
Luminosity1.219±0.007[6] L☉
Surface gravity (log g)4.47±0.01[5] cgs
Temperature5,932±3[5] K
Metallicity [Fe/H]−0.007±0.003[5] dex
Rotation~12.6[3] days
Rotational velocity (v sin i)2[7] km/s
Age2.70+0.23
−0.28[5] Gyr
Other designations
CD−47 13928, CPD−47 9758, FK5 1573, GC 30516, GJ 838, HD 207129, HIP 107649, HR 8323, SAO 230846, PPM 327579, CCDM J21483-4718A, WDS J21483-4718A, LTT 8704, NLTT 52100, IDS 21418-4746 A[8]
Database references
SIMBADdata

HD 207129 is a G-type main-sequence star about 50.7 light-years away in the constellation of Grus. It has an apparent visual magnitude of approximately 5.6. This is a Sun-like star with the same stellar classification (G2V) and a similar mass. It is roughly the same age as the Sun, but has a lower abundance of elements other than hydrogen and helium, which astronomers refer to as the star's metallicity.[7]

Image of the disk from the REASONS survey[6]
Image of the disk from the REASONS survey[6]

A debris disk has been imaged around this star in visible light using the ACS instrument on the Hubble Space Telescope; it has also been imaged in the infrared (70 μm) using the MIPS instrument on the Spitzer Space Telescope. Based on the ACS image, the disk appears to have a radius of about 163 astronomical units and to be about 30 AU wide, and to be inclined at 60° to the plane of the sky.[9]

Another star, CCDM J21483-4718B (also designated CD−47 13929 or WDS J21483-4718B), of apparent visual magnitude 8.7, has been observed 55 arcseconds away from this star,[10] but based on comparison of proper motions, it is believed to be an optical double and not physically related to its companion.[11] Gaia astrometry shows that this star has a much smaller parallax than HD 207129, confirming that it is an unrelated background star.[12]

The HD 207129 planetary system[6]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius

Template:Orbitbox planet disk

References

  1. ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Marshall, J. P.; Löhne, T.; Montesinos, B.; Krivov, A. V.; Eiroa, C.; Absil, O.; Bryden, G.; Maldonado, J. et al. (2011). "A Herschel resolved far-infrared dust ring around HD 207129". Astronomy and Astrophysics 529: A117. doi:10.1051/0004-6361/201116673. Bibcode: 2011A&A...529A.117M. 
  4. ↑ 4.0 4.1 HR 8323, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line February 9, 2011.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Carvalho-Silva, Gabriela; Meléndez, Jorge; Rathsam, Anne; Shejeelammal, J.; Martos, Giulia; Lorenzo-Oliveira, Diego; Spina, Lorenzo; Ribeiro Alves, Débora (April 2025). "A New Age–Activity Relation For Solar Analogs that Accounts for Metallicity" (in en). The Astrophysical Journal Letters 983 (2): L31. doi:10.3847/2041-8213/adc382. ISSN 2041-8205. Bibcode: 2025ApJ...983L..31C. 
  6. ↑ 6.0 6.1 6.2 6.3 Matrà, L.; Marino, S.; Wilner, D. J.; Kennedy, G. M.; Booth, M.; Krivov, A. V.; Williams, J. P.; Hughes, A. M. et al. (2025-01-15). "REsolved ALMA and SMA Observations of Nearby Stars (REASONS): A population of 74 resolved planetesimal belts at millimetre wavelengths". Astronomy and Astrophysics 693. doi:10.1051/0004-6361/202451397. Bibcode: 2025A&A...693A.151M. 
  7. ↑ 7.0 7.1 HD 207129, database entry, The Geneva-Copenhagen Survey of Solar neighbourhood, J. Holmberg et al., 2007, CDS ID V/117A. Accessed on line February 9, 2011.
  8. ↑ "HD 207129". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+207129. 
  9. ↑ HST and Spitzer Observations of the HD 207129 Debris Ring, John E. Krist et al., The Astronomical Journal 140, #4 (October 2010), pp. 1051-1061, doi:10.1088/0004-6256/140/4/1051, Bibcode: 2010AJ....140.1051K.
  10. ↑ CCDM J21483-4718, database entry, CCDM (Catalog of Components of Double & Multiple stars), J. Dommanget and O. Nys, second edition, 2002, VizieR database I/274.
  11. ↑ Notes, WDS 21483-4718, The Washington Double Star Catalog, B. D. Mason et al., version 2011-02-06, VizieR database B/wds.
  12. ↑ "CD-47 13929". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CD-47+13929. 



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