HD 108236

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

{{Starbox begin

|name=HD 108236

}}

{{Starbox observe

| epoch = J2000

| constell = Centaurus

| ra = {{RA|12|26|17.8916}}

| dec = {{DEC|-51|21|46.2141}}

| appmag_v = 9.24

}}

{{Starbox character

| type = main-sequence star

| class = G5V

}}

{{Starbox astrometry

| radial_v = 16.78{{±|0.22}}{{cite Gaia EDR3|6125644402384918784}}

| prop_mo_ra = −70.627

| prop_mo_dec = −49.758

| parallax = 15.4861

| p_error = 0.0127

| parallax_footnote =

}}

{{Starbox detail

|source={{citation|arxiv=2210.08912|year=2022|title=Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet|doi=10.1051/0004-6361/202243720 |last1=Hoyer |first1=S. |last2=Bonfanti |first2=A. |last3=Leleu |first3=A. |last4=Acuña |first4=L. |last5=Serrano |first5=L. M. |last6=Deleuil |first6=M. |last7=Bekkelien |first7=A. |last8=Broeg |first8=C. |last9=Florén |first9=H.-G. |last10=Queloz |first10=D. |last11=Wilson |first11=T. G. |last12=Sousa |first12=S. G. |last13=Hooton |first13=M. J. |last14=Adibekyan |first14=V. |last15=Alibert |first15=Y. |last16=Alonso |first16=R. |last17=Anglada |first17=G. |last18=Asquier |first18=J. |last19=Bárczy |first19=T. |last20=Barrado |first20=D. |last21=Barros |first21=S. C. C. |last22=Baumjohann |first22=W. |last23=Beck |first23=M. |last24=Beck |first24=T. |last25=Benz |first25=W. |last26=Billot |first26=N. |last27=Biondi |first27=F. |last28=Bonfils |first28=X. |last29=Brandeker |first29=A. |last30=Cabrera |first30=J. |journal=Astronomy & Astrophysics |volume=668 |pages=A117 |bibcode=2022A&A...668A.117H |s2cid=252832042 |display-authors=1 }}

| mass = 0.867{{±|0.047|0.046}}

| radius = 0.876{{±|0.007}}

| temperature = 5660{{±|61}}

| luminosity = 0.707{{±|0.032}}

| gravity = 4.49{{±|0.11}}

| metal_fe = −0.28{{±|0.04}}

| rotation =

| rotational_velocity =

| age_gyr = 6.7{{±|3.3|3.4}}

}}

{{Starbox catalog

| names = {{odlist|CD=-50 6971|2MASS=J12261789-5121462|TYC=8243-1948-1|HIP=60689|GSC=08243-01948|TOI=1233}}{{cite simbad|title=HD 108236|access-date=2021-01-17}}

}}

{{Starbox reference

| Simbad = HD+108236

}}

HD 108236 is a G-type main-sequence star. Its surface temperature is 5660{{±|61}} K. HD 108236 is severely depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.28{{±|0.04}} (52% of the Solar System), and is probably older than the Sun at an age of 6.7{{±|3.3|3.4}} billion years.

According to WISE mission data, the star was suspected to be surrounded by a debris disk, but a reanalysis of the data rejected the debris disk hypothesis by 2014.{{citation|arxiv=1403.3435|year=2014|doi=10.1088/0067-0049/212/1/10|title=A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood Through Precise Calibration of Saturated Wise Photometry|last1=Patel|first1=Rahul I.|last2=Metchev|first2=Stanimir A.|last3=Heinze|first3=Aren|journal=The Astrophysical Journal Supplement Series|volume=212|issue=1|page=10|bibcode=2014ApJS..212...10P|s2cid=119219094}} The reason for the false positive was contamination from a nearby infrared source.{{citation|arxiv=1612.04818|year=2016|doi=10.3847/1538-3881/153/2/54|title=The Faintest WISE debris Disks: Enhanced Methods for Detection and Verification|last1=Patel|first1=Rahul I.|last2=Metchev|first2=Stanimir A.|last3=Heinze|first3=Aren|last4=Trollo|first4=Joseph|journal=The Astronomical Journal|volume=153|issue=2|page=54|s2cid=3006490|bibcode=2017AJ....153...54P |doi-access=free }}

Planetary system

File:1863 hd 108236.jpg

In 2020, four planets orbiting HD 108236 were discovered{{cite journal|arxiv=2004.11314|year=2021|title=TESS Discovery of a Super-Earth and Three Sub-Neptunes Hosted by the Bright, Sun-like Star HD 108236|last1=Daylan|first1=Tansu|last2=Pingle|first2=Kartik|last3=Wright|first3=Jasmine|last4=Guenther|first4=Maximilian N.|last5=Stassun|first5=Keivan G.|last6=Kane|first6=Stephen R.|last7=Vanderburg|first7=Andrew|last8=Jontof-Hutter|first8=Daniel|last9=Rodriguez|first9=Joseph E.|last10=Shporer|first10=Avi|last11=Huang|first11=Chelsea|last12=Mikal-Evans|first12=Tom|last13=Badenas-Agusti|first13=Mariona|last14=Collins|first14=Karen A.|last15=Rackham|first15=Benjamin|last16=Quinn|first16=Sam|last17=Cloutier|first17=Ryan|last18=Collins|first18=Kevin I.|last19=Guerra|first19=Pere|last20=Jensen|first20=Eric L. N.|last21=Kielkopf|first21=John F.|last22=Massey|first22=Bob|last23=Schwarz|first23=Richard P.|last24=Charbonneau|first24=David|last25=Lissauer|first25=Jack J.|last26=Irwin|first26=Jonathan M.|last27=Basturk|first27=Ozgur|last28=Fulton|first28=Benjamin|last29=Soubkiou|first29=Abderahmane|last30=Zouhair|first30=Benkhaldoun|journal=The Astronomical Journal|volume=161|issue=2|page=85|doi=10.3847/1538-3881/abd73e|bibcode=2021AJ....161...85D |s2cid=216080635|display-authors=29 |doi-access=free }} by the transit method, followed by another one in 2021.{{cite journal|arxiv=2101.00663|year=2021|title=CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii|last1=Bonfanti|first1=A.|last2=Delrez|first2=L.|last3=Hooton|first3=M. J.|last4=Wilson|first4=T. G.|last5=Fossati|first5=L.|last6=Alibert|first6=Y.|last7=Hoyer|first7=S.|last8=Mustill|first8=A. J.|last9=Osborn|first9=H. P.|last10=Adibekyan|first10=V.|last11=Gandolfi|first11=D.|last12=Salmon|first12=S.|last13=Sousa|first13=S. G.|last14=Tuson|first14=A.|last15=Van Grootel|first15=V.|last16=Cabrera|first16=J.|last17=Nascimbeni|first17=V.|last18=Maxted|first18=P. F. L.|last19=Barros|first19=S. C. C.|last20=Billot|first20=N.|last21=Bonfils|first21=X.|last22=Borsato|first22=L.|last23=Broeg|first23=C.|last24=Davies|first24=M. B.|last25=Deleuil|first25=M.|last26=Demangeon|first26=O. D. S.|last27=Fridlund|first27=M.|last28=Lacedelli|first28=G.|last29=Lendl|first29=M.|last30=Persson|first30=C.|journal=Astronomy & Astrophysics|volume=646|pages=A157|doi=10.1051/0004-6361/202039608|bibcode=2021A&A...646A.157B |s2cid=230437723|display-authors=29}}

{{OrbitboxPlanet begin

| name = HD 108236

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass_earth = 4.23{{±|0.41|0.39}}

| radius_earth = 1.587{{±|0.028}}

| semimajor = 0.0451{{±|0.0004}}

| period = 3.7958785{{±|0.0000076|0.0000070}}

| eccentricity = 0.067{{±|0.025|0.026}}

| inclination = 88.23{{±|0.32}}

}}

{{OrbitboxPlanet

| exoplanet = c

| mass_earth = 8.90{{±|0.67|0.64}}

| radius_earth = 2.122{{±|0.025}}

| semimajor = 0.0626{{±|0.0006}}

| period = 6.2036717{{±|0.0000092|0.0000100}}

| eccentricity = 0.091{{±|0.021|0.033}}

| inclination = 88.8{{±|0.2}}

}}

{{OrbitboxPlanet

| exoplanet = d

| mass_earth = 7.75{{±|0.91|0.62}}

| radius_earth = 2.629{{±|0.031}}

| semimajor = 0.1087{{±|0.0010}}

| period = 14.175818{{±|0.000024|0.000023}}

| eccentricity = 0.075{{±|0.021|0.022}}

| inclination = 88.8{{±|0.1}}

}}

{{OrbitboxPlanet

| exoplanet = e

| mass_earth = 8.2{{±|3.8|1.2}}

| radius_earth = 3.008{{±|0.032}}

| semimajor = 0.1348{{±|0.0012}}

| period = 19.5901277{{±|0.000030}}

| eccentricity = 0.073{{±|0.014|0.017}}

| inclination = 89.3{{±|0.1}}

}}

{{OrbitboxPlanet

| exoplanet = f

| mass_earth = 3.95{{±|0.46|0.32}}

| radius_earth = 1.89{{±|0.04}}

| semimajor = 0.1773{{±|0.0016}}

| period =29.53935{{±|0.00012|0.00014}}

| eccentricity = 0.024{{±|0.024|0.016}}

| inclination = 89.07{{±|0.03}}

}}

References

Category:Centaurus

Category:Planetary transit variables

Category:G-type main-sequence stars

Category:Planetary systems with five confirmed planets

HD 108236

Planetary system

See also

References