HD 185269

HD 185269
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 19h 37m 11.7411s[1]
Declination +28° 29′ 59.5025″[1]
Apparent magnitude (V) 6.67[2]
Characteristics
Spectral type G0IV[2]
B−V color index 0.58[2]
Astrometry
Proper motion (μ) RA: −31.499±0.045[1] mas/yr
Dec.: −80.782±0.046[1] mas/yr
Parallax (π)19.2049 ± 0.0309 mas[1]
Distance169.8 ± 0.3 ly
(52.07 ± 0.08 pc)
Absolute magnitude (MV)3.29[2]
Absolute bolometric
magnitude (Mbol)		3.228[2]
Details[2]
Mass1.33 ± 0.07 M☉
Surface gravity (log g)4.05 ± 0.22 cgs
Temperature5983 ± 62 K
Metallicity [Fe/H]0.10 ± 0.08 dex
Rotational velocity (v sin i)5.5 km/s
Age4.0 ± 1.0 Gyr
Other designations
BD+28° 3412, HIP 96507, SAO 87464[3]
Database references
SIMBADdata
Exoplanet Archivedata

HD 185269 is a stellar triple system[4] approximately 170 light-years away in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.

The primary star is a third more massive[2] and four times more luminous than the Sun.[citation needed] The spectrum of the star is G0IV.[2] About 4.5 arcseconds away are the two other stars, which are much less massive than the Sun. The primary has a mass of 0.165 M☉, while the secondary has a mass of 0.154 M☉.[4]

Planetary system

The Jupiter-mass hot Jupiter was independently discovered orbiting the primary star by two different teams using doppler spectroscopy. One group led by Claire Moutou used the ELODIE spectrograph at the Haute-Provence Observatory in France while John Asher Johnson and collaborators used the Coudé Auxiliary and C. Donald Shane telescopes at Lick Observatory in California.[2][5] The planet takes 6.8 days to orbit at 0.077 AU from the primary star in an eccentric orbit.

The HD 185269 planetary system[6]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥1.010±0.014 MJ 0.0770±0.0034 6.83776±0.00027 0.229±0.014 — —

See also

References

  1. ^ a b c d e 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. ^ a b c d e f g h i Moutou, C.; et al. (2006). "ELODIE metallicity-biased search for transiting Hot Jupiters. III. A hot Jupiter orbiting the star HD 185269". Astronomy and Astrophysics. 458 (1): 327–329. arXiv:0707.0958. Bibcode:2006A&A...458..327M. doi:10.1051/0004-6361:20066029.
  3. ^ "HD 185269". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-19.
  4. ^ a b Ginski, C.; et al. (2016). "A lucky imaging multiplicity study of exoplanet host stars – II". Monthly Notices of the Royal Astronomical Society. 457 (2): 2173–2191. arXiv:1601.01524. Bibcode:2016MNRAS.457.2173G. doi:10.1093/mnras/stw049.
  5. ^ Johnson, John Asher; et al. (2006). "An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269". The Astrophysical Journal. 652 (2): 1724–1728. arXiv:astro-ph/0608035. Bibcode:2006ApJ...652.1724J. doi:10.1086/508255.
  6. ^ Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.



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