Qatar-1

{{Starbox begin

| name = Qatar-1

}}

{{Starbox observe

| epoch = J2000

| equinox =

| constell = Draco

| pronounce =

| ra = {{RA|20|13|31.6176}}

| dec = {{DEC|65|09|43.4909}}

| appmag_v = 12.84

}}

{{Starbox character

| type = main sequence star

| class = K3V

| r-i =

| v-r = 0.19

| b-v = 1.06

| u-b =

| j-h = 0.472

| j-k = 0.590

| variable = planetary transit variable

}}

{{Starbox astrometry

| radial_v = -37.835{{±|0.063}}

| total_v =

| prop_mo_ra = 12.636{{±|0.048}}

| prop_mo_dec = 58.170{{±|0.041}}

| parallax = 5.3587

| p_error = 0.0231

| parallax_footnote =

| dist_ly =

| dist_pc =

| absmag_v =

| absmag_bol =

}}

{{Starbox detail

| source = {{cite journal|arxiv=1012.3027|doi=10.1111/j.1365-2966.2011.19316.x|title=Qatar-1b: A hot Jupiter orbiting a metal-rich K dwarf star|year=2011|last1=Alsubai|first1=K. A.|last2=Parley|first2=N. R.|last3=Bramich|first3=D. M.|last4=West|first4=R. G.|last5=Sorensen|first5=P. M.|last6=Collier Cameron|first6=A.|last7=Latham|first7=D. W.|last8=Horne|first8=K.|last9=Anderson|first9=D. R.|last10=Bakos|first10=G. Á.|last11=Brown|first11=D. J. A.|last12=Buchhave|first12=L. A.|last13=Esquerdo|first13=G. A.|last14=Everett|first14=M. E.|last15=Fűrész|first15=G.|last16=Hartman|first16=J. D.|last17=Hellier|first17=C.|last18=Miller|first18=G. M.|last19=Pollacco|first19=D.|last20=Quinn|first20=S. N.|last21=Smith|first21=J. C.|last22=Stefanik|first22=R. P.|last23=Szentgyorgyi|first23=A.|journal=Monthly Notices of the Royal Astronomical Society|volume=417|issue=1|pages=709–716|doi-access=free |bibcode=2011MNRAS.417..709A|s2cid=55675165}}

| mass = 0.85{{±|0.03}}

| radius = 0.823{{±|0.025}}

| luminosity =

| gravity = 4.536{{±|0.024}}

| temperature = 4861{{±|125}}

| metal_fe = 0.2{{±|0.1}}

| rotation =

| rotational_velocity = 1.7{{±|0.3}}

| age_gyr = 4.5

}}

{{Starbox catalog

| names = Qatar-1, 2MASS J20133160+6509433, Gaia DR2 2244830490514284928, V592 Dra[http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Qatar%201 Qatar 1 -- High proper-motion Star]

}}

{{Starbox reference

| Simbad = Qatar-1

}}

Qatar-1 is an orange main sequence star in the constellation of Draco.

Star characteristics

Qatar-1 has an average to high metallicity of 160% of solar, and is of similar age to Sun. The star has significant starspot activity.{{cite journal|arxiv=1503.02246|doi=10.1093/mnras/stv197|title=High-precision multiband time series photometry of exoplanets Qatar-1b and TrES-5b|year=2015|last1=Mislis|first1=D.|last2=Mancini|first2=L.|last3=Tregloan-Reed|first3=J.|last4=Ciceri|first4=S.|last5=Southworth|first5=J.|last6=d'Ago|first6=G.|last7=Bruni|first7=I.|last8=Baştürk|first8=Ö.|last9=Alsubai|first9=K. A.|last10=Bachelet|first10=E.|last11=Bramich|first11=D. M.|last12=Henning|first12=Th.|last13=Hinse|first13=T. C.|last14=Iannella|first14=A. L.|last15=Parley|first15=N.|last16=Schroeder|first16=T.|journal=Monthly Notices of the Royal Astronomical Society|volume=448|issue=3|pages=2617–2623|doi-access=free |bibcode=2015MNRAS.448.2617M|s2cid=53561305}}

Planetary system

The "Hot Jupiter" class planet Qatar-1b was discovered by the Qatar Exoplanet Survey in 2010. The planetary orbit is likely aligned with the rotational axis of the star, with the misalignment measurement based on the Rossiter-McLaughlin effect equal to −8.4{{±|7.1}} degrees. The planet has a large measured temperature difference between dayside (1696{{±|39}} K) and nightside (1098{{±|158}} K).{{citation|arxiv=2203.15059|year=2022|title=A New Analysis of Eight Spitzer Phase Curves and Hot Jupiter Population Trends: Qatar-1b, Qatar-2b, WASP-52b, WASP-34b, and WASP-140b|last1=May|first1=Erin|last2=Stevenson|first2=Kevin|last3=Bean|first3=Jacob|last4=Bell|first4=Taylor|last5=Cowan|first5=Nicolas|last6=Dang|first6=Lisa|last7=Desert|first7=Jean-Michel|last8=Fortney|first8=Jonathan|last9=Keating|first9=Dylan|last10=Kempton|first10=Eliza|last11=Komacek|first11=Thaddeus|last12=Lewis|first12=Nikole|last13=Mansfield|first13=Megan|last14=Morley|first14=Caroline|last15=Parmentier|first15=Vivien|last16=Rauscher|first16=Emily|last17=Swain|first17=Mark|last18=Zellem|first18=Robert|last19=Showman|first19=Adam|journal=The Astronomical Journal |volume=163 |issue=6 |page=256 |doi=10.3847/1538-3881/ac6261 |bibcode=2022AJ....163..256M |s2cid=247778438 |doi-access=free }} A spectroscopic study in 2017 does suggest that Qatar-1b has relatively clear skies with a few clouds.{{cite journal|arxiv=1703.10647|doi=10.1051/0004-6361/201730506|title=Testing connections between exo-atmospheres and their host stars|year=2017|last1=von Essen|first1=C.|last2=Cellone|first2=S.|last3=Mallonn|first3=M.|last4=Albrecht|first4=S.|last5=Miculán|first5=R.|last6=Müller|first6=H. M.|journal=Astronomy & Astrophysics|volume=603|pages=A20|s2cid=119452420}}

Additional planets or a brown dwarf in the system were suspected in 2013,{{cite journal|arxiv=1309.1457|doi=10.1051/0004-6361/201321407|title=Qatar-1: Indications for possible transit timing variations|year=2013|last1=von Essen|first1=C.|last2=Schröter|first2=S.|last3=Agol|first3=E.|last4=Schmitt|first4=J. H. M. M.|journal=Astronomy & Astrophysics|volume=555|pages=A92|bibcode=2013A&A...555A..92V|s2cid=119174903}} but were refuted in 2015.{{cite journal|arxiv=1503.07191|doi=10.1051/0004-6361/201526031|title=No variations in transit times for Qatar-1 B|year=2015|last1=MacIejewski|first1=G.|last2=Fernández|first2=M.|last3=Aceituno|first3=F. J.|last4=Ohlert|first4=J.|last5=Puchalski|first5=D.|last6=Dimitrov|first6=D.|last7=Seeliger|first7=M.|last8=Kitze|first8=M.|last9=Raetz|first9=St.|last10=Errmann|first10=R.|last11=Gilbert|first11=H.|last12=Pannicke|first12=A.|last13=Schmidt|first13=J.-G.|last14=Neuhäuser|first14=R.|journal=Astronomy & Astrophysics|volume=577|pages=A109|bibcode=2015A&A...577A.109M|s2cid=118638934}}{{cite journal|arxiv=1512.00464|last1=Collins|first1=Karen A.|last2=Kielkopf|first2=John F.|last3=Stassun|first3=Keivan G.|title=TRANSIT TIMING VARIATION MEASUREMENTS OF WASP-12b AND QATAR-1b: NO EVIDENCE OF ADDITIONAL PLANETS|journal=The Astronomical Journal|year=2015|volume=153|issue=2|page=78|doi=10.3847/1538-3881/153/2/78|s2cid=55191644 |doi-access=free }}

The transit-timing variation search in 2020 has also resulted in no detection of additional planets in the system,{{citation|arxiv=2007.03753|title=Investigating Extra-solar Planetary System Qatar-1 through Transit Observations|year=2020|doi=10.25518/0037-9565.7577|last1=Thakur|first1=Parijat|last2=Mannaday|first2=Vineet Kumar|last3=Sahu|first3=Devendra Kumar|last4=Chand|first4=Swadesh|last5=Jiang|first5=Ing-Guey|journal=Bulletin de la Société Royale des Sciences de Liège|pages=132–136|s2cid=54660279}}{{citation|arxiv=2012.08184|title=Are There Transit Timing Variations for the Exoplanet Qatar-1b?|year=2021|doi=10.3847/1538-3881/abd4d8|last1=Su|first1=Li-Hsin|last2=Jiang|first2=Ing-Guey|last3=Sariya|first3=Devesh P.|last4=Lee|first4=Chiao-Yu|last5=Yeh|first5=Li-Chin|last6=Mannaday|first6=Vineet Kumar|last7=Thakur|first7=Parijat|last8=Sahu|first8=D. K.|last9=Chand|first9=Swadesh|last10=Shlyapnikov|first10=A. A.|last11=Moskvin|first11=V. V.|last12=Ignatov|first12=Vladimir|last13=Mkrtichian|first13=David|last14=Griv|first14=Evgeny|journal=The Astronomical Journal|volume=161|issue=3|page=108|bibcode=2021AJ....161..108S |s2cid=229181287 |doi-access=free }} although by 2022 additional transit-timing variation data have suggested the planetary system is accelerating under influence of the unseen long-period companion.{{citation|arxiv=2209.04080|year=2022|title=Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data|doi=10.3847/1538-3881/ac91c2 |last1=Mannaday |first1=Vineet Kumar |last2=Thakur |first2=Parijat |last3=Southworth |first3=John |last4=Jiang |first4=Ing-Guey |last5=Sahu |first5=D. K. |last6=Mancini |first6=L. |last7=Vaňko |first7=M. |last8=Kundra |first8=Emil |last9=Gajdoš |first9=Pavol |last10=a-Thano |first10=Napaporn |last11=Sariya |first11=Devesh P. |last12=Yeh |first12=Li-Chin |last13=Griv |first13=Evgeny |last14=Mkrtichian |first14=David |last15=Shlyapnikov |first15=Aleksey |journal=The Astronomical Journal |volume=164 |issue=5 |page=198 |bibcode=2022AJ....164..198M |s2cid=252185524 |doi-access=free }}

{{OrbitboxPlanet begin

| name = Qatar-1

| table_ref={{cite journal|arxiv=1304.0005|doi=10.1051/0004-6361/201321298|title=The GAPS programme with HARPS-N at TNG|year=2013|last1=Covino|first1=E.|last2=Esposito|first2=M.|last3=Barbieri|first3=M.|last4=Mancini|first4=L.|last5=Nascimbeni|first5=V.|last6=Claudi|first6=R.|last7=Desidera|first7=S.|last8=Gratton|first8=R.|last9=Lanza|first9=A. F.|last10=Sozzetti|first10=A.|last11=Biazzo|first11=K.|last12=Affer|first12=L.|last13=Gandolfi|first13=D.|last14=Munari|first14=U.|last15=Pagano|first15=I.|last16=Bonomo|first16=A. S.|last17=Collier Cameron|first17=A.|last18=Hébrard|first18=G.|last19=Maggio|first19=A.|last20=Messina|first20=S.|last21=Micela|first21=G.|last22=Molinari|first22=E.|last23=Pepe|first23=F.|last24=Piotto|first24=G.|last25=Ribas|first25=I.|last26=Santos|first26=N. C.|last27=Southworth|first27=J.|last28=Shkolnik|first28=E.|last29=Triaud|first29=A. H. M. J.|last30=Bedin|first30=L.|journal=Astronomy & Astrophysics|volume=554|pages=A28|s2cid=54793301|display-authors=29}}

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = 1.33{{±|0.05}}

| period = 1.4200236{{±|0.0000001}}

| semimajor = 0.02343{{±|0.0012}}

| radius = 1.19{{±|0.09}}

| eccentricity = 0.020{{±|0.011|0.01}}

| inclination = 84.23{{±|0.06}}

}}

References

Category:Planetary systems with one confirmed planet

Category:Draco (constellation)

Category:K-type main-sequence stars

Category:Planetary transit variables