HD 168443

HD 168443 is a yellow dwarf star of (spectral type G5) about the mass of the Sun. It is in the constellation of Serpens Cauda, 129 light years from the Solar System. It is known to be orbited by one large planet, discovered in 1999, and a brown dwarf, discovered in 2001. The brown dwarf takes 30 times longer to orbit the star than the gas giant planet.[2][3][4]

The HD 168443 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >7.696 ± 0.015[5] MJ 0.29 58.116 ± 0.001 0.529 ± 0.02 — —
c >17.378 ± 0.044[5] MJ 2.87 1739.5 ± 3.8 0.228 ± 0.005 — —
HD 168443
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Serpens
Right ascension  18h 20m 03.9332s[1]
Declination −09° 35′ 44.6093″[1]
Apparent magnitude (V) 6.92
Characteristics
Spectral type G5IV
Astrometry
Proper motion (μ) RA: −91.685±0.089[1] mas/yr
Dec.: −224.285±0.077[1] mas/yr
Parallax (π)25.2084 ± 0.0772[1] mas
Distance129.4 ± 0.4 ly
(39.7 ± 0.1 pc)
Other designations
BD-09°4692, GJ 4052,
HIP 89844, LTT 7289, SAO 142228
Database references
SIMBADdata
Exoplanet Archivedata

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Marcy, Geoffrey W.; et al. (1999). "Two New Planets in Eccentric Orbits". The Astrophysical Journal. 520 (1): 239–247. arXiv:astro-ph/9904275. Bibcode:1999ApJ...520..239M. doi:10.1086/307451.
  3. Marcy, Geoffrey W.; et al. (2001). "Two Substellar Companions Orbiting HD 168443". The Astrophysical Journal. 555 (1): 418–425. Bibcode:2001ApJ...555..418M. doi:10.1086/321445.
  4. Reffert, S.; Quirrenbach, A. (2006). "Hipparcos astrometric orbits for two brown dwarf companions: HD 38529 and HD 168443". Astronomy and Astrophysics. 449 (2): 699–702. Bibcode:2006A&A...449..699R. doi:10.1051/0004-6361:20054611.
  5. Wang, Sharon Xuesong; et al. (2012). "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b". The Astrophysical Journal. 761 (1). 46. arXiv:1210.6985. Bibcode:2012ApJ...761...46W. doi:10.1088/0004-637X/761/1/46.


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