HD 185269

HD 185269
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 19h 37m 11.7412s[1]
Declination +28° 29′ 59.507″[1]
Apparent magnitude (V) 6.67
Characteristics
Spectral type G0IV
Astrometry
Proper motion (μ) RA: −31.608±0.021[1] mas/yr
Dec.: −81.065±0.030[1] mas/yr
Parallax (π)19.10 ± 0.41[1] mas
Distance171 ± 4 ly
(52 ± 1 pc)
Other designations
BD+28° 3412, GC 27147, HIP 96507, SAO 87464
Database references
SIMBADdata
Exoplanet Archivedata

HD 185269 is a stellar triple system[2] approximately 171 light-years away in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.

The primary star is a quarter more massive and four times more luminous than our local star. The spectrum of the star is G0IV.

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.[3][4] 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
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.94 MJ 0.077 6.838 ± 0.001 0.3 ± 0.04 — —

See also

References

  1. 1 2 3 4 5 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
  2. ↑ 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.
  3. ↑ 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.
  4. ↑ 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.
  • "Notes for star HD 185269". The Extrasolar Planet Encyclopaedia.
  • "HD 185269". Systemic.

Coordinates: 19h 37m 11.7408s, +28° 29′ 59.509″


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