HD 191806

HD 191806
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 20h 09m 28.30960s[1]
Declination +52° 16′ 34.79″[1]
Apparent magnitude (V) 8.093[2]
Characteristics
Spectral type K0
Apparent magnitude (B) 8.71[2]
Apparent magnitude (J) 6.966[3]
Apparent magnitude (H) 6.713[3]
Apparent magnitude (K) 6.639[3]
B−V color index +0.64[4]
Astrometry
Proper motion (μ) RA: 113.90[1] mas/yr
Dec.: 90.05[1] mas/yr
Parallax (π)14.41 ± 0.50[1] mas
Distance226 ± 8 ly
(69 ± 2 pc)
Absolute magnitude (MV)3.89 ± 0.08[4]
Details[4]
Mass1.14 ± 0.12 M☉
Luminosity2.23 ± 0.16 L☉
Surface gravity (log g)4.45 ± 0.03 cgs
Temperature6010 ± 30 K
Metallicity+0.30 ± 0.02
Rotation20.6 ± 6.9 d
Age2.9 ± 0.4 Gyr
Other designations
BD+51° 2782, HIP 99306, SAO 32320
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 191806 is an 8th magnitude K-type star located approximately 226 light years away in the constellation Cygnus. In 2016, a massive gas giant planet was found in orbit around the star.

The HD 191806 planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥8.52 ± 0.63 MJ 2.8 ± 0.1 1606.3 ± 7.2 0.259 ± 0.017 — —

See also

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 Høg, E.; Fabricius, C.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  3. 1 2 3 Cutri, R. M.; Skrutskie, M. F. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources". Bibcode:2003yCat.2246....0C.
  4. 1 2 3 4 Daiz, R. F.; Rey, J.; et al. (2013). "The SOPHIE search for northern extrasolar planets. XI. Three new companions and an orbit update: Giant planets in the habitable zone". Astronomy and Astrophysics. 591. A146. arXiv:1604.07610. Bibcode:2016A&A...591A.146D. doi:10.1051/0004-6361/201628331.

Coordinates: 20h 11m 30.7166s, −64° 37′ 13.694″


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