HD 185269

Last updated
HD 185269
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Cygnus [1]
Right ascension 19h 37m 11.74116s [2]
Declination +28° 29′ 59.5070″ [2]
Apparent magnitude  (V)6.67 [3]
Characteristics
Evolutionary stage subgiant [4]
Spectral type G0IV [3]
B−V color index 0.58 [3]
Astrometry
Proper motion (μ)RA: −31.563 [2] mas/yr
Dec.: −81.082 [2] mas/yr
Parallax (π)19.2423±0.0182  mas [2]
Distance 169.5 ± 0.2  ly
(51.97 ± 0.05  pc)
Absolute magnitude  (MV)3.29 [3]
Absolute bolometric
magnitude  (Mbol)		3.228 [3]
Details
Mass 1.33 [3]   M☉
Radius 2.1 [2]   R☉
Luminosity 4.8 [2]   L☉
Surface gravity (log g)4.05 [3]   cgs
Temperature 5,983 [3]   K
Metallicity [Fe/H]0.10 [3]   dex
Rotation 29.5 [5] days
Rotational velocity (v sin i)5.5 [3]  km/s
Age 4.0 [3]   Gyr
Other designations
BD+28°3412, HIP 96507, SAO 87464 [6]
Database references
SIMBAD data
Exoplanet Archive data

HD 185269 is a stellar triple system [7] approximately 170 light-years away in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.

Contents

The primary star is a third more massive [3] and nearly five times as luminous than the Sun. [2] The spectrum of the star is G0IV. [3] 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☉. [7]

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 [8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.010±0.014  MJ 0.0770±0.00346.83776±0.000270.229±0.014——

See also

References

  1. ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
  2. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 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. 1 2 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 .
  5. ↑ Llorente De Andrés, F.; de la Reza, R.; Cruz, P.; Cuenda-Muñoz, D.; Alfaro, E. J.; Chavero, C.; Cifuentes, C. (2024). "The evolution of lithium in FGK dwarf stars. Influence of planets and Galactic migration". Astronomy and Astrophysics. 684. arXiv: 2402.01315 . Bibcode:2024A&A...684A..28L. doi:10.1051/0004-6361/202346744.
  6. ↑ "HD 185269". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-09-19.
  7. 1 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 .
  8. ↑ 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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