HD 168443

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HD 168443
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Serpens
Right ascension 18h 20m 03.933288s[1]
Declination −09° 35′ 44.614581″[1]
Apparent magnitude (V) 6.92[2]
Characteristics
Spectral type G6V[3]
B−V color index 0.724±0.014[2]
Distance
127.4 ± 0.2 ly
(39.08 ± 0.06 pc)
Absolute magnitude (MV)4.198[4]
Details
Gyr
LTT 7289[6]
Database references
Exoplanet Archive
data

HD 168443 is an ordinary yellow-hued

light years from the Sun based on parallax,[1] but is drifting closer with a radial velocity of −48.7 km/s.[2]

This stellar object is a

luminosity of the Sun from its photosphere at an effective temperature of 5,491 K.[4]

Planetary system

HD 168443 is known to be orbited by a super-Jupiter exoplanet, discovered in 1999, and a brown dwarf, discovered in 2001. The brown dwarf takes 30 times longer to orbit the star than the planet.[7][8][9] Both have eccentric orbits.[4] An orbital fit to Hipparcos astrometric data suggested the brown dwarf has a mass of 34±12 MJ.[9] A 2022 study utilizing both Hipparcos and Gaia data instead measured a true mass of 17.3 MJ for HD 168443 c, close to the minimum mass.[10] Test simulations of massless particles orbiting in between these two bodies show that all such objects are quickly ejected within two million years. That suggests any other planetary companions would be orbiting further out from the star.[11]

The HD 168443 planetary system[4][10]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥7.659±0.0975 MJ 0.2931±0.00181 58.11247±0.0003 0.52883±0.00103 — —
c 17.306+2.550
−0.906 MJ 		2.8373±0.018 1,749.83±0.57 0.2113±0.00171 91.218+22.283
−16.088° 		—

See also

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    S2CID 119257644
    .
  3. ^
    S2CID 119476992
  4. ^
    S2CID 13190486
    . 162.
  5. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  6. ^ "HD 168443". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-06.
  7. S2CID 16827678
    .
  8. doi:10.1086/321445
    .
  9. ^
    hdl:1887/7483
    .
  10. ^
    S2CID 251864022
    .
  11. S2CID 12380925
    .

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_168443&oldid=1195823294"