HD 222155#Planetary system

{{Short description|Old G-type main sequence star in the constellation Andromeda}}

{{Starbox begin

| name = HD 222155

}}

{{Starbox observe

| constell = Andromeda

| epoch = J2000

| ra = {{RA|23|38|00.30719}}

| dec = {{Dec|+48|59|47.4874}}

| appmag_v = 7.1

}}

{{Starbox character

| type = subgiant

| class = G0

}}

{{Starbox astrometry

| radial_v = {{val|-44.00|0.12}}

| prop_mo_ra = 195.306

| prop_mo_dec = -117.335

| pm_footnote =

| parallax = 19.8020

| p_error = 0.0160

| parallax_footnote =

| absmag_v = +3.66

}}

{{Starbox detail

| mass = 1.0{{±|0.1}}

| radius = 1.8{{±|0.1}}

| luminosity = 3.2{{±|0.1}}

| gravity = 3.93{{±|0.08}}

| temperature = 5,741{{±|133}}

| metal_fe = −0.22{{±|0.04}}

| rotation = 10.08 days

| rotational_velocity = 3.8

| age_gyr = 8.0{{±|0.4}}

}}

{{Starbox catalog

| names = {{odlist | BD=+48 4112 | HD=222155 | HIP=116616 | SAO=53211|Gaia DR2=1943363751009454976|2MASS=J23380027+4859475|TYC=3646-2286-1}}

}}

{{Starbox reference

| Simbad = HD+222155

}}

HD 222155 is a star in the northern constellation of Andromeda. It is a yellow star that can be viewed with binoculars or a small telescope, but is too faint to be seen with the naked eye at an apparent visual magnitude of 7.1. The imaging survey in 2017 did not detect any stellar companions to HD 222155.

This is a G-type star with a stellar classification of G0. It has exhausted the hydrogen fuel in its core and begun to evolve towards a red giant; it is currently on the subgiant branch. It has begun to expand its gaseous envelope, having a radius of {{Solar radius|1.8|link=y}} with a mass almost the same as the Sun's The star is relatively depleted of heavy elements, having about 80% of solar abundance, and has weak yet noticeable ultraviolet flare activity.

Planetary system

Based on radial velocity data gathered in 2007–2011, the discovery of a superjovian planet b outside the habitable zone was announced in May 2012. The stellar and planetary parameters were refined in 2016. In 2023, the inclination and true mass of HD 222155 b were measured via astrometry.

{{OrbitboxPlanet begin

| table_ref =

}}

{{Orbitbox planet

| exoplanet = b

| mass = {{val|2.1|0.3|0.2}}

| period = {{val|3470|102|106}}

| semimajor = {{val|4.7|0.1}}

| eccentricity = {{val|0.34|0.09}}

| inclination = {{val|66|14|11}} or {{val|115|13|16}}

}}

References

{{reflist|refs=

{{cite journal |bibcode=2019AJ....158..138S |title=The Revised TESS Input Catalog and Candidate Target List |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |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. |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |display-authors=1 }}

{{cite journal |bibcode=2021A&A...654A.137L |title=The evolution of lithium in FGK dwarf stars. The lithium-rotation connection and the Li desert |last1=Llorente De Andrés |first1=F. |last2=Chavero |first2=C. |last3=de la Reza |first3=R. |last4=Roca-Fàbrega |first4=S. |last5=Cifuentes |first5=C. |journal=Astronomy and Astrophysics |date=2021 |volume=654 |doi=10.1051/0004-6361/202141339 |arxiv=2108.05852 }}

{{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 |bibcode=2013ApJ...766....9S |title=An Ultraviolet Investigation of Activity on Exoplanet Host Stars |last1=Shkolnik |first1=Evgenya L. |journal=The Astrophysical Journal |date=2013 |volume=766 |issue=1 |page=9 |doi=10.1088/0004-637X/766/1/9 |arxiv=1301.6192 }}

{{cite journal |bibcode=2018A&A...614A..55A |title=Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert |last1=Aguilera-Gómez |first1=Claudia |last2=Ramírez |first2=Iván |last3=Chanamé |first3=Julio |journal=Astronomy and Astrophysics |date=2018 |volume=614 |pages=A55 |doi=10.1051/0004-6361/201732209 |arxiv=1803.05922 }}

{{cite journal|arxiv=1910.07573|title=Resilient habitability of nearby exoplanet systems|year=2020|doi=10.1093/mnras/stz3408|last1=Kokaia|first1=Giorgi|last2=Davies|first2=Melvyn B.|last3=Mustill|first3=Alexander J.|journal=Monthly Notices of the Royal Astronomical Society|volume=492|issue=1|pages=352–368|doi-access=free |bibcode=2020MNRAS.492..352K|s2cid=204743669}}

{{cite journal |arxiv=1709.05315v1 |title=Exclusion of Stellar Companions to Exoplanet Host Stars |year=2017 |last1=Wittrock |first1=Justin M. |last2=Kane |first2=Stephen R. |last3=Horch |first3=Elliott P. |last4=Howell |first4=Steve B. |last5=Ciardi |first5=David R. |last6=Everett |first6=Mark E. |journal=The Astronomical Journal |volume=154 |issue=5 |page=184 |doi=10.3847/1538-3881/aa8d69 |bibcode=2017AJ....154..184W |s2cid=55789971 |doi-access=free }}

{{cite journal|arxiv=1609.04389|title=Accurate empirical radii and masses of planets and their host stars with Gaia parallaxes|year=2016|doi=10.3847/1538-3881/aa5df3|last1=Stassun|first1=Keivan G.|last2=Collins|first2=Karen A.|last3=Gaudi|first3=B. Scott|journal=The Astronomical Journal|volume=153|issue=3|page=136|bibcode=2017AJ....153..136S |s2cid=119219062 |doi-access=free }}

{{cite journal |doi=10.1051/0004-6361/201118419 |arxiv=1205.5835 |title=The SOPHIE search for northern extrasolar planets V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars |year=2012 |last1=Boisse |first1=Isabelle |last2=Pepe |first2=Francesco |last3=Perrier |first3=Christian |last4=Queloz |first4=Didier |last5=Bonfils |first5=Xavier |last6=Bouchy |first6=François |last7=Santos |first7=Nuno C. |last8=Arnold |first8=Luc |last9=Beuzit |first9=Jean-Luc |last10=Dìaz |first10=Rodrigo F. |last11=Delfosse |first11=Xavier |last12=Eggenberger |first12=Anne |last13=Ehrenreich |first13=David |last14=Forveille |first14=Thierry |last15=Hébrard |first15=Guillaume |last16=Lagrange |first16=Anne-Marie |last17=Lovis |first17=Christophe |last18=Mayor |first18=Michel |last19=Moutou |first19=Claire |last20=Naef |first20=Dominique |last21=Santerne |first21=Alexandre |last22=Ségransan |first22=Damien |last23=Sivan |first23=Jean-Pierre |last24=Udry |first24=Stéphane |journal=Astronomy and Astrophysics |volume=545 |pages=A55 |bibcode=2012A&A...545A..55B |s2cid=119109836 }}

{{cite journal|arxiv=2003.03349v1|title=A statistical search for Star-Planet Interaction in the UltraViolet using GALEX

|year=2020|doi=10.3847/1538-3881/ab7d3b

|last1=Viswanath

|first1=Gayathri

|last2=Narang

|first2=Mayank

|last3=Manoj

|first3=P.

|last4=Mathew

|first4=Blesson

|last5=Kartha

|first5=Sreeja S.

|journal=The Astronomical Journal

|volume=159

|issue=5

|page=194

|bibcode=2020AJ....159..194V

|s2cid=212628609

|doi-access=free

}}

{{cite journal |last1=Philipot |first1=F. |last2=Lagrange |first2=A.-M. |display-authors=etal |arxiv=2301.01263 |title=Updated characterization of long-period single companion by combining radial velocity, relative astrometry, and absolute astrometry |journal=Astronomy & Astrophysics |date=January 2023|volume=670 |pages=A65 |doi=10.1051/0004-6361/202245396 |bibcode=2023A&A...670A..65P |s2cid=255393653 }}

}}

Category:G-type subgiants

Category:Planetary systems with one confirmed planet

Category:Andromeda (constellation)

Category:Durchmusterung objects

222155

116616

J23380027+4859475