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HD 207832
Observation data; Epoch J2000 Equinox J2000
Constellation	Piscis Austrinus
Right ascension	21h 52m 36.2810s
Declination	−26° 01′ 35.6133″
Apparent magnitude (V)	8.79
Characteristics
Evolutionary stage	main-sequence star
Spectral type	G5V
Astrometry
Radial velocity (Rv)	-16.481±0.185 km/s
Proper motion (μ)	RA: 129.310 mas/yr ; Dec.: -143.132 mas/yr
Parallax (π)	16.8897 ± 0.0151 mas
Distance	193.1 ± 0.2 ly ; (59.21 ± 0.05 pc)
Details
Mass	1.08±0.01 M☉
Radius	0.97±0.02 R☉
Luminosity	0.78±0.09 L☉
Surface gravity (log g)	4.61±0.04 cgs
Temperature	5764±15 K
Metallicity [Fe/H]	0.17±0.01 dex
Rotation	17.8 d
Age	0.74±0.62 Gyr
Other designations
	CD−26 15858, HIP 107985, TYC 6589-761-1, GSC 06956-00378, 2MASS J21523626-2601352
Database references
SIMBAD	data

HD 207832 is a G-type main-sequence star. Its surface temperature is 5764±15 K.^[4] HD 207832 is slightly enriched compared to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.17±0.01 and is much younger at an age of 0.74±0.62 billion years. Kinematically, it belongs to the thin disk of the Milky Way.^[4]

A multiplicity study in 2014 detected a candidate comoving stellar companion - a red dwarf star or brown dwarf with a spectral class M6.5, at a very wide projected separation of 38.57′ (2.0 light years)^[6]

Planetary system

In 2012, two planets, named HD 207832 b and HD 207832 c, were discovered by the radial velocity method on wide, eccentric orbits.^[5] The planetary system would remain stable even if the planetary orbits are coplanar.^[7]

Although discovery of the inner planet was confirmed^[2] in 2018, the discovery of both planets was suspected to be a false positive in 2020, as newer radial velocity data do not support the existence of the planets.^[8]

The HD 207832 planetary system^[2]^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b (unconfirmed)	≥ 0.56±0.091 M_J	0.586±0.032	160.07±0.23	0.197±0.053	—	—
c (unconfirmed)	≥0.73^+0.18 _−0.05 M_🜨	2.112^+0.087 _−0.045	1155.7^+71.9 _−37.0	0.27^+0.22 _−0.10	—	—

References

^ ^a ^b ^c "HD 207832". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-20.
^ ^a ^b ^c ^d Ment, Kristo; Fischer, Debra A.; Bakos, Gaspar; Howard, Andrew W.; Isaacson, Howard (2018), "Radial velocities from the N2K Project: 6 new cold gas giant planets orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810", The Astronomical Journal, 156 (5): 213, arXiv:1809.01228, Bibcode:2018AJ....156..213M, doi:10.3847/1538-3881/aae1f5, S2CID 119243619
^ ^a ^b ^c ^d 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.
^ ^a ^b ^c Maldonado, J.; Villaver, E.; Eiroa, C. (2018), "Chemical fingerprints of hot Jupiter planet formation", Astronomy & Astrophysics, 612: A93, arXiv:1712.01035, Bibcode:2018A&A...612A..93M, doi:10.1051/0004-6361/201732001, S2CID 119458710
^ ^a ^b ^c Haghighipour, Nader; Butler, R. Paul; Rivera, Eugenio J.; Henry, Gregory W.; Vogt, Steven S. (2012), "The Lick-Carnegie Survey: A New Two-Planet System Around the Star HD 207832", The Astrophysical Journal, 756 (1): 91, arXiv:1207.2806, Bibcode:2012ApJ...756...91H, doi:10.1088/0004-637X/756/1/91, S2CID 1137984
^ Lodieu, N.; Perez-Garrido, A.; Bejar, V. J. S.; Gauza, B.; Ruiz, M. T.; Rebolo, R.; Pinfield, D. J.; Martin, E. L. (2014), "Binary frequency of planet-host stars at wide separations. A new brown dwarf companion to a planet-host star", Astronomy & Astrophysics, A120: 569, arXiv:1408.1208, Bibcode:2014A&A...569A.120L, doi:10.1051/0004-6361/201424210, S2CID 118516214
^ Anderson, Kassandra R.; Lai, Dong (2017), "Moderately eccentric warm Jupiters from secular interactions with exterior companions", Monthly Notices of the Royal Astronomical Society, 472 (3): 3692–3705, arXiv:1706.00084, Bibcode:2017MNRAS.472.3692A, doi:10.1093/mnras/stx2250, S2CID 119260335
^ Luhn, Jacob K.; Wright, Jason T.; Howard, Andrew W.; Isaacson, Howard (2020), "Astrophysical Insights into Radial Velocity Jitter from an Analysis of 600 Planet-search Stars", The Astronomical Journal, 159 (5): 235, arXiv:2004.13734, Bibcode:2020AJ....159..235L, doi:10.3847/1538-3881/ab855a, S2CID 216642215