HD 207129

HD 207129
Location of HD 207129 (circled in red)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 21h 48m 15.7512s
Declination −47° 18′ 13.018″
Apparent magnitude (V) 5.57
Characteristics
Evolutionary stage main sequence
Spectral type G2V
U−B color index +0.08
B−V color index +0.60
Astrometry
Radial velocity (Rv)−7.55±0.12 km/s
Proper motion (μ) RA: +165.069 mas/yr
Dec.: −295.553 mas/yr
Parallax (π)64.2717±0.0430 mas
Distance50.75 ± 0.03 ly
(15.56 ± 0.01 pc)
Absolute magnitude (MV)+4.55
Details
Mass1.06±0.01 M☉
Radius1.062±0.008 R☉
Luminosity1.219±0.007 L☉
Surface gravity (log g)4.47±0.01 cgs
Temperature5,932±3 K
Metallicity [Fe/H]−0.007±0.003 dex
Rotation~12.6 days
Rotational velocity (v sin i)2 km/s
Age2.70+0.23
−0.28 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
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.

Image of the disk from the REASONS survey

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.

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, but based on comparison of proper motions, it is believed to be an optical double and not physically related to its companion. Gaia astrometry shows that this star has a much smaller parallax than HD 207129, confirming that it is an unrelated background star.

The HD 207129 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination
(°)		 Radius
circumstellar disc 150±2 AU 60.7+1.0
−0.9°		 —

References

  1. 1 2 3 4 Anderson, 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 Marshall, J. P.; Löhne, T.; Montesinos, B.; Krivov, A. V.; Eiroa, C.; Absil, O.; Bryden, G.; Maldonado, J.; Mora, A.; Sanz-Forcada, J.; Ardila, D.; Augereau, J. -Ch.; Bayo, A.; Del Burgo, C.; Danchi, W.; Ertel, S.; Fedele, D.; Fridlund, M.; Lebreton, J.; González-García, B. M.; Liseau, R.; Meeus, G.; Müller, S.; Pilbratt, G. L.; Roberge, A.; Stapelfeldt, K.; Thébault, P.; White, G. J.; Wolf, S. (2011). "A Herschel resolved far-infrared dust ring around HD 207129". Astronomy and Astrophysics. 529: A117. arXiv:1104.3560. Bibcode:2011A&A...529A.117M. doi:10.1051/0004-6361/201116673.
  4. 1 2 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. 1 2 3 4 5 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". The Astrophysical Journal Letters. 983 (2): L31. arXiv:2504.17482. Bibcode:2025ApJ...983L..31C. doi:10.3847/2041-8213/adc382. ISSN 2041-8205.
  6. 1 2 3 4 Matrà, L.; Marino, S.; Wilner, D. J.; Kennedy, G. M.; Booth, M.; Krivov, A. V.; Williams, J. P.; Hughes, A. M.; Burgo, C. del (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. arXiv:2501.09058. Bibcode:2025A&A...693A.151M. doi:10.1051/0004-6361/202451397.
  7. 1 2 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.
  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.