HD 191806

{{Starbox observe

| epoch = J2000.0

| constell = Cygnus

| ra = {{RA|20|09|28.30936}}

| dec = {{DEC|+52|16|34.8000}}

| appmag_v = 8.08{{±|0.01}}

}}

{{Starbox character

| type =

| class = rG0V

| b-v = +0.63

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{val|-15.33|0.13}}

| prop_mo_ra = {{val|114.022|0.022}}

| prop_mo_dec = {{val|91.296|0.022}}

| pm_footnote =

| parallax = 15.1975

| p_error = 0.0182

| parallax_footnote =

| absmag_v = +3.89

}}

{{Starbox detail

| mass = 1.1{{±|0.1}}

| radius = 1.48{{±|0.14|0.13}}

| gravity = 4.15{{±|0.15}}

| luminosity = {{val|2.23|0.16}}

| temperature = 5,894{{±|155|86}}

| metal_fe = {{val|+0.30|0.02}}

| age_gyr = {{val|2.9|0.4}}

| rotation = {{val|20.6|6.9|u=days}}

| rotational_velocity = 3.3

}}

{{Starbox catalog

| names = {{odlist | AG=+52°1354 | HD=191806 | BD=+51°2782 | HIP=99306 | SAO=32320 }}

}}

{{Starbox reference

| Simbad = HD+191806

| NSTED = HD 191806

| EPE = HD+191806

}}

HD 191806 is a star located in the northern constellation Cygnus. With an apparent magnitude of 8.093, it's undetectable with the naked eye, but can be seen with binoculars. HD 191806 is currently placed at a distance of 215 light years based on parallax measurements and is drifting towards the Solar System with a spectroscopic radial velocity of {{val|-15.28|ul=km/s}}.

HD 191806 has a stellar classification of G0V, indicating that it is a G-type main sequence star. It has 110% the mass of the Sun and a slightly enlarged radius of {{val|1.48|ul=solar radius}}. It radiates at 2.23 times the luminosity of the Sun from its photosphere at an effective temperature of {{val|5894|ul=K|fmt=commas}}, giving a yellow hue. HD 191806 is estimated to be about 3 billion years old and has a metallicity nearly twice of the Sun's. It spins with a projected rotational velocity of {{val|3.3|ul=km/s}}, which corresponds to a rotational period of 21 days.

Planetary System

Observations for exoplanets orbiting the star began in 2007 when it was selected by the N2K Consortium as a potential host due to its high metallicity. After ten years of, a team of astronomers found a super Jupiter orbiting the star. The star has a secular acceleration of {{val|11|p=>|ul=km/s}}, suggesting either the presence of a stellar companion or another planet. In 2022, the inclination and true mass of HD 191806 b were measured via astrometry.

{{OrbitboxPlanet begin

| table_ref =

| period_unit = year

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|9.334|0.919|0.852}}

| period = {{val|4.390|0.027|0.031}}

| semimajor = {{val|2.749|0.106|0.118}}

| eccentricity = {{val|0.213|0.029|0.028}}

| inclination = {{val|66.519|5.830|4.851}}

}}

References

{{reflist||refs=

{{cite simbad

| title=HD 191806 | access-date=2021-01-09 }}

{{cite journal |bibcode=2010PASP..122.1437P |title=All-Sky Spectrally Matched UBVRI - ZY and u^′ g^′ r^′ i^′ z^′ Magnitudes for Stars in the Tycho2 Catalog |last1=Pickles |first1=A. |last2=Depagne |first2=É. |journal=Publications of the Astronomical Society of the Pacific |year=2010 |volume=122 |issue=898 |page=1437 |doi=10.1086/657947 |arxiv=1011.2020 |s2cid=54678796 }}

{{cite journal |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |title=XHIP: An extended hipparcos compilation |journal=Astronomy Letters |date=May 2012 |volume=38 |issue=5 |pages=331–346 |doi=10.1134/S1063773712050015 |language=en |issn=1063-7737 |bibcode=2012AstL...38..331A |arxiv=1108.4971|s2cid=119257644 }}

{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=March 2000 |volume=355 |pages=L27–L30 |issn=0004-6361 |bibcode=2000A&A...355L..27H}}

{{cite journal | display-authors = 1 | last1 = Díaz | first1 = R. F. | last2 = Rey | first2 = J. | last3 = Demangeon | first3 = O. | last4 = Hébrard | first4 = G. | last5 = Boisse | first5 = I. | last6 = Arnold | first6 = L. | last7 = Astudillo-Defru | first7 = N. | last8 = Beuzit | first8 = J.-L. | last9 = Bonfils | first9 = X. | last10 = Borgniet | first10 = S. | last11 = Bouchy | first11 = F. | last12 = Bourrier | first12 = V. | last13 = Courcol | first13 = B. | last14 = Deleuil | first14 = M. | last15 = Delfosse | first15 = X. | last16 = Ehrenreich | first16 = D. | last17 = Forveille | first17 = T. | last18 = Lagrange | first18 = A.-M. | last19 = Mayor | first19 = M. | last20 = Moutou | first20 = C. | last21 = Pepe | first21 = F. | last22 = Queloz | first22 = D. | last23 = Santerne | first23 = A. | last24 = Santos | first24 = N. C. | last25 = Sahlmann | first25 = J. | last26 = Ségransan | first26 = D. | last27 = Udry | first27 = S. | last28 = Wilson | first28 = P. A. | title = The SOPHIE search for northern extrasolar planets | journal = Astronomy & Astrophysics | date = July 2016 | volume = 591 | page = A146 | issn = 0004-6361 | eissn = 1432-0746 | doi = 10.1051/0004-6361/201628331 | bibcode = 2016A&A...591A.146D | arxiv = 1604.07610 | doi-access = free}}

{{cite journal |last1=Allende Prieto |first1=C. |last2=Lambert |first2=D. L. |title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures |journal=Astronomy and Astrophysics |date=December 1999 |volume=352 |pages=555–562 |issn=0004-6361 |bibcode=1999A&A...352..555A |arxiv=astro-ph/9911002 }}

{{cite journal |display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=Lee |first6=Nathan De |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |last31=Sharma |first31=Sanjib |last32=Shiao |first32=Bernie |last33=Sozzetti |first33=Alessandro |last34=Stello |first34=Dennis |last35=Vanderspek |first35=Roland |last36=Wallace |first36=Geoff |last37=Winn |first37=Joshua N. |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=9 September 2019 |volume=158 |issue=4 |pages=138 |doi=10.3847/1538-3881/ab3467 |issn=0004-6256 |bibcode=2019AJ....158..138S |arxiv=1905.10694 |doi-access=free}}

{{cite journal | last1 = Robinson | first1 = Sarah E. | last2 = Ammons | first2 = S. Mark | last3 = Kretke | first3 = Katherine A. | last4 = Strader | first4 = Jay | last5 = Wertheimer | first5 = Jeremy G. | last6 = Fischer | first6 = Debra A. | last7 = Laughlin | first7 = Gregory | title = The N2K Consortium. VII. Atmospheric Parameters of 1907 Metal-rich Stars: Finding Planet-Search Targets | journal = The Astrophysical Journal Supplement Series | date = April 2007 | volume = 169 | issue = 2 | pages = 430–438 | issn = 0067-0049 | eissn = 1538-4365 | doi = 10.1086/513108 | bibcode = 2007ApJS..169..430R | arxiv = astro-ph/0701631 | doi-access = free}}

{{cite journal |last1=Feng |first1=Fabo |last2=Butler |first2=R. Paul |display-authors=etal |date=August 2022 |title=3D Selection of 167 Substellar Companions to Nearby Stars |journal=The Astrophysical Journal Supplement Series |volume=262 |issue=21 |page=21 |doi=10.3847/1538-4365/ac7e57 |arxiv=2208.12720 |bibcode=2022ApJS..262...21F|s2cid=251864022 |doi-access=free }}

}}

Category:Planetary systems with one confirmed planet

Category:Cygnus (constellation)

Category:Durchmusterung objects

191806

099306

Category:G-type main-sequence stars

HD 191806

Planetary System

See also

References