Astronomy:HD 185269
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas |
| 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 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | 185269 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.
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.
| 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
- List of extrasolar planets
References
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 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. doi:10.1051/0004-6361:20066029. Bibcode: 2006A&A...458..327M. https://www.aanda.org/articles/aa/full/2006/40/aa6029-06/aa6029-06.html.
- ↑ 4.0 4.1 Johnson, John Asher et al. (2006). "An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269". The Astrophysical Journal 652 (2): 1724–1728. doi:10.1086/508255. Bibcode: 2006ApJ...652.1724J.
- ↑ 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. doi:10.1051/0004-6361/202346744. Bibcode: 2024A&A...684A..28L.
- ↑ "HD 185269". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+185269.
- ↑ 7.0 7.1 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. doi:10.1093/mnras/stw049. Bibcode: 2016MNRAS.457.2173G. https://academic.oup.com/mnras/article/457/2/2173/968721.
- ↑ 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. doi:10.3847/1538-3881/aaf5d0. Bibcode: 2019AJ....157..149L.
External links
- "Notes for star HD 185269". Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=HD+185269.
- "HD 185269". Systemic. 20 April 2007. http://oklo.org/?p=204.
Coordinates: 
19h 37m 11.7408s, +28° 29′ 59.509″
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