HD 185269

{{Short description|Triple star system in the constellation Cygnus}}

{{starbox begin

| name = HD 185269

}}

{{starbox observe

| epoch = J2000.0

| constell = Cygnus

| ra = {{RA|19|37|11.74116}}

| dec = {{DEC|+28|29|59.5070}}

| appmag_v = 6.67

}}

{{starbox character

| type = subgiant

| class = G0IV

| b-v = 0.58

}}

{{Starbox astrometry

| radial_v =

| prop_mo_ra = −31.563

| prop_mo_dec = −81.082

| parallax = 19.2423

| p_error = 0.0182

| parallax_footnote =

| absmag_v = 3.29

| absmag_bol = 3.228

}}

{{Starbox detail

| source =

| mass = 1.33

| temperature = 5,983

| luminosity = 4.8

| radius = 2.1

| gravity = 4.05

| metal_fe = 0.10

| rotation = 29.5 days

| rotational_velocity = 5.5

| age_gyr = 4.0

}}

{{starbox catalogue

| names = {{odlist | BD=+28°3412 | HIP=96507 | SAO=87464 }}

}}

{{starbox reference

| Simbad = HD+185269

| NSTED = HD 185269

}}

HD 185269 is a stellar triple system 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 and nearly five times as luminous than the Sun. The spectrum of the star is G0IV. About 4.5 arcseconds away are the two other stars, which are much less massive than the Sun. The primary has a mass of {{solar mass|0.165}}, while the secondary has a mass of {{solar mass|0.154}}.

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. The planet takes 6.8 days to orbit at 0.077 AU from the primary star in an eccentric orbit.

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|1.010|0.014|p=≥}}

| semimajor = {{val|0.0770|0.0034}}

| period = {{Val|6.83776|0.00027}}

| eccentricity = {{Val|0.229|0.014}}

}}

References

{{Reflist|refs=

{{cite journal |bibcode=2024A&A...684A..28L |title=The evolution of lithium in FGK dwarf stars. Influence of planets and Galactic migration |last1=Llorente De Andrés |first1=F. |last2=de la Reza |first2=R. |last3=Cruz |first3=P. |last4=Cuenda-Muñoz |first4=D. |last5=Alfaro |first5=E. J. |last6=Chavero |first6=C. |last7=Cifuentes |first7=C. |journal=Astronomy and Astrophysics |date=2024 |volume=684 |doi=10.1051/0004-6361/202346744 |arxiv=2402.01315 }}

{{cite journal | title=A lucky imaging multiplicity study of exoplanet host stars – II | url=https://academic.oup.com/mnras/article/457/2/2173/968721 | last1=Ginski | first1=C. | last2=Mugrauer | first2=M. | last3=Seeliger | first3=M. | last4=Buder | first4=S. | last5=Errmann | first5=R. | last6=Avenhaus | first6=H. | last7=Mouillet | first7=D. | last8=Maire | first8=A.-L. | last9=Raetz | first9=S. | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=457 | issue=2 | pages=2173–2191 | year=2016 | arxiv=1601.01524 | bibcode=2016MNRAS.457.2173G | bibcode-access=free | doi=10.1093/mnras/stw049 | doi-access=free }}

{{cite journal | title=An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269 | last1=Johnson | first1=John Asher | last2=Marcy | first2=Geoffrey W. | last3=Fischer | first3=Debra A. | last4=Henry | first4=Gregory W. | last5=Wright | first5=Jason T. | last6=Isaacson | first6=Howard | last7=McCarthy | first7=Chris | display-authors=1 | journal=The Astrophysical Journal | volume=652 | issue=2 | pages=1724–1728 | year=2006 | arxiv=astro-ph/0608035 | bibcode=2006ApJ...652.1724J | bibcode-access=free | doi=10.1086/508255 | doi-access=free }}

{{cite journal | title=Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts | last1=Luhn | first1=Jacob K. | last2=Bastien | first2=Fabienne A. | last3=Wright | first3=Jason T. | last4=Johnson | first4=John A. | last5=Howard | first5=Andrew W. | last6=Isaacson | first6=Howard | display-authors=1 | journal=The Astronomical Journal | volume=157 | issue=4 | at=149 | year=2019 | arxiv=1811.03043 | bibcode=2019AJ....157..149L | doi=10.3847/1538-3881/aaf5d0 | s2cid=102486961 | doi-access=free }}

{{cite journal | title=ELODIE metallicity-biased search for transiting Hot Jupiters. III. A hot Jupiter orbiting the star HD 185269 | url=https://www.aanda.org/articles/aa/full/2006/40/aa6029-06/aa6029-06.html | last1=Moutou | first1=C. | last2=Loeillet | first2=B. | last3=Bouchy | first3=F. | last4=Da Silva | first4=R. | last5=Mayor | first5=M. | last6=Pont | first6=F. | last7=Queloz | first7=D. | last8=Santos | first8=N. C. | last9=Ségransan | first9=D. | last10=Udry | first10=S. | last11=Zucker | first11=S. | display-authors=1 | journal=Astronomy and Astrophysics | volume=458 | issue=1 | pages=327–329 | year=2006 | bibcode=2006A&A...458..327M | bibcode-access=free | doi=10.1051/0004-6361:20066029 | doi-access=free | arxiv=0707.0958 }}

{{cite journal |bibcode=2012AstL...38..331A |title=XHIP: An extended hipparcos compilation |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |journal=Astronomy Letters |date=2012 |volume=38 |issue=5 |page=331 |doi=10.1134/S1063773712050015 |arxiv=1108.4971 }}

}}

External links

{{cite encyclopedia | url=http://exoplanet.eu/star.php?st=HD+185269 | archive-url=https://web.archive.org/web/20070929083350/http://exoplanet.eu/star.php?st=HD+185269 | url-status=dead | archive-date=September 29, 2007 | encyclopedia=Extrasolar Planets Encyclopaedia | title=Notes for star HD 185269 }}
{{cite web | url=http://oklo.org/?p=204 | title=HD 185269 | work=Systemic| date=20 April 2007 }}

Category:G-type subgiants

Category:Hertzsprung gap

Category:Planetary systems with one confirmed planet

Category:Cygnus (constellation)

Category:Durchmusterung objects

185269

096507

HD 185269

Planetary system

See also

References

External links