TYC 9486-927-1: Difference between revisions
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{{Short description|Primary star of a trinary star system in the constellation Octans}} |
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{{Starbox begin |
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{{Starbox begin}} |
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| name = TYC 9486-927-1 1 |
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{{Starbox image |
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}} |
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| image = [[Image:FTOctLightCurve.png|250px]] |
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| caption = A [[light curve]] for FT Octantis, plotted from ''[[Transiting Exoplanet Survey Satellite|TESS]]'' data<ref name=MAST/> |
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}} |
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{{Starbox observe |
{{Starbox observe |
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| epoch = |
| epoch = J2000 |
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| constell = [[Octans]] |
| constell = [[Octans]] |
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| ra = {{RA|21|25|27. |
| ra = {{RA|21|25|27.4805}}<ref name="Gaia DR3"/> |
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| dec = {{DEC| |
| dec = {{DEC|−81|38|27.692}}<ref name="Gaia DR3"/> |
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| appmag_v = 11. |
| appmag_v = 11.5 - 12.0<ref name=gcvs/> |
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}} |
}} |
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{{Starbox character |
{{Starbox character |
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| class = M1 V<ref name=sacy/> |
| class = M1 V<ref name=sacy/> |
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| variable = [[BY Draconis variable|BY Dra]]<ref name=gcvs/> |
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}} |
}} |
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{{Starbox astrometry |
{{Starbox astrometry |
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| radial_v = 8.7 |
| radial_v = {{val|8.7|4.6}}<ref name=sacy/> |
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| prop_mo_ra = |
| prop_mo_ra = {{val|60.645|(46)}} |
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| prop_mo_dec = |
| prop_mo_dec = {{val|−107.740|(48)}} |
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| pm_footnote = <ref name="Gaia DR3"/> |
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| parallax = |
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| |
| parallax = 29.0266 |
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| p_error = 0.0401 |
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| parallax_footnote = |
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| parallax_footnote = <ref name="Gaia DR3"/> |
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| dist_ly = |
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| dist_pc = {{val|26.7|5.7|4.7}}<ref name=deacon/> |
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| absmag_v = |
| absmag_v = |
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}} |
}} |
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| age_myr = 10-45<ref name=deacon/> |
| age_myr = 10-45<ref name=deacon/> |
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| metal = |
| metal = |
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| mass = 0. |
| mass = 0.53<ref name=Smart2019/> |
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| radius = 0.46<ref name=conch/> |
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| mass_mj = |
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| radius = |
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| temperature = 3,490<ref name=deacon/> |
| temperature = 3,490<ref name=deacon/> |
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| luminosity = 0.032<ref name=conch/> |
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| luminosity_bolometric = |
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| gravity = 4.3<ref name=rave/> |
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| luminosity_visual = |
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| rotation = 0.541945<ref name=gcvs/> days |
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| gravity = |
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| rotational_velocity = {{val|43.5|1.2}}<ref name=deacon/> |
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| rotation = |
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| |
| metal_fe = −1.3<ref name=rave/> |
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| age_gyr = |
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}} |
}} |
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{{Starbox catalog |
{{Starbox catalog |
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| names = 2MASS J21252752-8138278 |
| names = 2MASS J21252752-8138278, [[variable star designation|FT]] Octantis |
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}} |
}} |
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{{Starbox reference |
{{Starbox reference |
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{{Starbox end}} |
{{Starbox end}} |
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'''TYC 9486-927-1''' (also known as '''2MASS J21252752-8138278''') is a [[star]] located at a distance of |
'''TYC 9486-927-1''' (also known as '''2MASS J21252752-8138278''') is the primary of a possible trinary [[star system]] located at a distance of 34.5 parsecs from [[Earth]] in the southern direction in the constellation of [[Octans]]. It is a [[BY Draconis variable]], with large starspots causing it to change brightness as it rotates every 13 hours.<ref name=gcvs/> |
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TYC 9486-927-1 has rapid rotation and [[stellar corona|coronal]] and [[chromospheric activity]] suggestive of a young age. Observations and multi-epoch [[radial velocity]] data suggest that TYC 9486-927-1 is a single, rapidly rotating star rather than a [[spectroscopic]] or tight [[visual binary]]. However, it is still possible that TYC 9486-927-1 is an equal mass binary with a face-on orbit and close separation.<ref name=sacy/> |
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The star is the primary object of a planetary system having the secondary object [[2MASS J21265040-8140293]]. This substellar object, being an exoplanet, is the most extensive [[planetary systems|planetary system]] known to date.{{Clarify|reason=What does extensive mean in this context|date=July 2020}} |
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The candidate secondary stellar companion is 2MASS J21121598–8128452. It is a [[red dwarf]] star of spectral class M5.5. Its projected separation from the primary would be 62,700 [[astronomical unit|AU]]. The candidate tertiary companion is 2MASS J21192028–8145446 - of spectral class M6 or M7 and at a projected separation of 31,000 [[astronomical units|AU]] from the primary.<ref name=Smart2019/>{{rp|7}} |
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TYC 9486-927-1 has rapid rotation and [[stellar corona|coronal]] and [[chromospheric activity]] suggestive of a young age. Observations and multi-epoch radial velocity data suggest that TYC 9486-927-1 is a single, rapidly rotating star rather than a [[spectroscopic]] or tight, [[visual binary]]. However, it is still possible that TYC 9486-927-1 is an equal mass binary with a face-on orbit and close separation.<ref name=sacy/> |
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==Planetary system== |
==Planetary system== |
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The planet [[2MASS J21265040-8140293]] orbits TYC 9486-927-1 at a projected separation of {{Val|7400|u=AU}}.<ref name=Smart2019>{{citation|arxiv=1902.07571|title=The Gaia Ultra-Cool Dwarf Sample – II: Structure at the end of the main sequence|year=2019|doi=10.1093/mnras/stz678|last1=Jones|first1=H R A.|last2=Caballero|first2=J. A.|last3=Beamín|first3=J. C.|last4=Barrado|first4=D.|last5=Sarro|first5=L. M.|last6=Marocco|first6=F.|last7=Smart|first7=R. L.|journal=Monthly Notices of the Royal Astronomical Society|volume=485|issue=3|pages=4423–4440|bibcode=2019MNRAS.485.4423S|s2cid=119421722}}</ref> With a mass from 11.6 to 15 [[Jupiter]] masses, it is considered to be either a brown dwarf, or a giant planet.<ref name=banyan/><ref name=reid/> |
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The star is host to two planets; TYC 8998-760-1b, and TYC 8998-760-1c. The system was directly imaged in July 2020 by the [[Spectro-Polarimetric High-Contrast Exoplanet Research|SPHERE]] instrument on the VLT. <ref>{{Cite web|title=Astronomers Directly Image Two Giant Exoplanets around Young Sun-Like Star {{!}} Astronomy {{!}} Sci-News.com|url=http://www.sci-news.com/astronomy/directly-imaged-multi-planet-system-young-sun-like-star-08665.html|access-date=2020-07-25|website=Breaking Science News {{!}} Sci-News.com|language=en-US}}</ref> |
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{{OrbitboxPlanet begin |
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| name = TYC 9486-927-1 |
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| table_ref = <!--Reference for values in table (optional)--> |
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}} |
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{{OrbitboxPlanet |
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| exoplanet = {{nowrap|[[2MASS J2126–8140]]/b}} |
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| mass = 13.3 (± 1.7)<ref name=Exoplanet.eu>{{cite encyclopedia |
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|url = https://exoplanet.eu/catalog/2m_j2126_81_b--2544/ |
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|encyclopedia = [[Extrasolar Planets Encyclopaedia]] |
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|title = Planet 2MASS J2126-8140 |
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|access-date = 2016-01-27 |
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}}</ref> |
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| mass_earth = <!--Mass of the planet, in Earth masses (can use mass instead)--> |
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| radius = <!-- Radius of the planet, in Jupiter radii --> |
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| radius_earth = <!-- Radius of the planet, in Earth radii --> |
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| semimajor = 6,900<ref name=deacon/> |
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| period = 328 725 000{{Citation needed|date=January 2021}} |
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| eccentricity = <!--Eccentricity of the planet--> |
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| inclination = <!-- Orbital inclination (to the line of sight) --> |
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}} |
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{{Orbitbox end}} |
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==References== |
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1b has a radius {{Jupiter radius|3}} a mass of {{Jupiter mass|14}}. 1c has a mass of at least {{Jupiter mass|6}}. |
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{{Reflist|refs= |
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<ref name="Gaia DR3">{{Cite Gaia DR3|6348514275456913792}}</ref> |
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The two planets orbit at distances of 160 and 320 AU. |
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<ref name=reid>{{cite journal|bibcode=2008AJ....136.1290R|title=Meeting the Cool Neighbors. X. Ultracool Dwarfs from the 2MASS All-Sky Data Release|journal=The Astronomical Journal|volume=136|issue=3|pages=1290|last1=Reid|first1=I. Neill|last2=Cruz|first2=Kelle L.|last3=Kirkpatrick|first3=J. Davy|last4=Allen|first4=Peter R.|last5=Mungall|first5=F.|last6=Liebert|first6=James|last7=Lowrance|first7=Patrick|last8=Sweet|first8=Anne|year=2008|doi=10.1088/0004-6256/136/3/1290|arxiv=0806.3413}}</ref> |
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==2MASS J21265040-8140293== |
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{{Main|2MASS J2126-8140}} |
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<ref name=banyan>{{cite journal|bibcode=2014ApJ...783..121G|arxiv=1312.5864|title=BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups with Previously Known Signs of Youth|journal=The Astrophysical Journal|volume=783|issue=2|pages=121|last1=Gagné|first1=Jonathan|last2=Lafrenière|first2=David|last3=Doyon|first3=René|last4=Malo|first4=Lison|last5=Artigau|first5=Étienne|year=2014|doi=10.1088/0004-637X/783/2/121|s2cid=119251619}}</ref> |
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2MASS J21265040-8140293 orbits it's host star TYC 9486-927-1. |
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With a mass from 11.6 to 15 [[Jupiter]] masses, it is considered to be either a brown dwarf or a giant planet.<ref name="banyan" /><ref name="reid" /> |
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<ref name=deacon>{{cite journal|bibcode=2016MNRAS.457.3191D|arxiv=1601.06162|title=A nearby young M dwarf with a wide, possibly planetary-mass companion|journal=Monthly Notices of the Royal Astronomical Society|volume=457|issue=3|pages=3191|last1=Deacon|first1=N. R.|last2=Schlieder|first2=J. E.|last3=Murphy|first3=S. J.|year=2016|doi=10.1093/mnras/stw172|s2cid=18220333}}</ref> |
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==References== |
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{{Reflist|refs= |
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<ref name= |
<ref name=sacy>{{cite journal|bibcode=2006A&A...460..695T|arxiv=astro-ph/0609258|title=Search for associations containing young stars (SACY). I. Sample and searching method|journal=Astronomy and Astrophysics|volume=460|issue=3|pages=695|last1=Torres|first1=C. A. O.|last2=Quast|first2=G. R.|last3=Da Silva|first3=L.|last4=de la Reza|first4=R.|last5=Melo|first5=C. H. F.|last6=Sterzik|first6=M.|year=2006|doi=10.1051/0004-6361:20065602|s2cid=16080025}}</ref> |
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<ref name=gcvs>{{cite journal |
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<ref name=banyan>{{cite journal|bibcode=2014ApJ...783..121G|arxiv=1312.5864|title=BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups with Previously Known Signs of Youth|journal=The Astrophysical Journal|volume=783|issue=2|pages=121|author1=Gagné|first1=Jonathan|last2=Lafrenière|first2=David|last3=Doyon|first3=René|last4=Malo|first4=Lison|last5=Artigau|first5=Étienne|year=2014|doi=10.1088/0004-637X/783/2/121}}</ref> |
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| display-authors=1 | last1=Samus | first1=N. N. |
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| last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V. |
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| last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N. |
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| title=General Catalogue of Variable Stars |
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| version=5.1 | journal=Astronomy Reports |
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| year=2017 | volume=61 | issue=1 | pages=80–88 |
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| bibcode=2017ARep...61...80S | s2cid=125853869 |
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| doi=10.1134/S1063772917010085 }}</ref> |
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<ref name=MAST>{{cite web |
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<ref name=deacon>{{cite journal|bibcode=2016MNRAS.457.3191D|arxiv=1601.06162|title=A nearby young M dwarf with a wide, possibly planetary-mass companion|journal=Monthly Notices of the Royal Astronomical Society|volume=457|issue=3|pages=3191|author1=Deacon|first1=N. R.|last2=Schlieder|first2=J. E.|last3=Murphy|first3=S. J.|year=2016|doi=10.1093/mnras/stw172}}</ref> |
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| title=MAST: Barbara A. Mikulski Archive for Space Telescopes |
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| url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html |
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| publisher=Space Telescope Science Institute |access-date=8 December 2021}}</ref> |
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<ref name=conch>{{cite journal |
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<ref name=sacy>{{cite journal|bibcode=2006A&A...460..695T|arxiv=astro-ph/0609258|title=Search for associations containing young stars (SACY). I. Sample and searching method|journal=Astronomy and Astrophysics|volume=460|issue=3|pages=695|author1=Torres|first1=C. A. O.|last2=Quast|first2=G. R.|last3=Da Silva|first3=L.|last4=de la Reza|first4=R.|last5=Melo|first5=C. H. F.|last6=Sterzik|first6=M.|year=2006|doi=10.1051/0004-6361:20065602}}</ref> |
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| title=Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life |
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| display-authors=1 | last1=Gaidos | first1=E. |
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| last2=Mann | first2=A. W. | last3=Lépine | first3=S. |
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| last4=Buccino | first4=A. | last5=James | first5=D. |
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| last6=Ansdell | first6=M. | last7=Petrucci | first7=R. |
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| last8=Mauas | first8=P. | last9=Hilton | first9=E. J. |
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| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=443 | issue=3 | pages=2561–2578 | date=September 2014 |
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| doi=10.1093/mnras/stu1313 | arxiv=1406.7353 |
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| bibcode=2014MNRAS.443.2561G | s2cid=119234492 }}</ref> |
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<ref name=rave>{{cite journal |bibcode=2020yCat.3283....0S |title=VizieR Online Data Catalog: RAVE 6th data release (Steinmetz+, 2020) |last1=Steinmetz |first1=M. |last2=Matijevic |first2=G. |last3=Enke |first3=H. |last4=Zwitter |first4=T. |last5=Guiglion |first5=G. |last6=McMillan |first6=P. J. |last7=Kordopatis |first7=G. |last8=Valentini |first8=M. |last9=Chiappini |first9=C. |last10=Casagrande |first10=L. |last11=Wojno |first11=J. |last12=Anguiano |first12=B. |last13=Bienayme |first13=O. |last14=Bijaoui |first14=A. |last15=Binney |first15=J. |last16=Burton |first16=D. |last17=Cass |first17=P. |last18=De Laverny |first18=P. |last19=Fiegert |first19=K. |last20=Freeman |first20=K. |last21=Fulbright |first21=J. P. |last22=Gibson |first22=B. K. |last23=Gilmore |first23=G. |last24=Grebel |first24=E. K. |last25=Helmi |first25=A. |last26=Kunder |first26=A. |last27=Munari |first27=U. |last28=Navarro |first28=J. F. |last29=Parker |first29=Q. |last30=Ruchti |first30=G. R. |journal=Vizier Online Data Catalog |year=2020 |display-authors=1 }}</ref> |
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<ref name=ucac4>{{cite journal|bibcode=2012yCat.1322....0Z|title=VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)|journal=VizieR On-line Data Catalog: I/322A. Originally Published in: 2012yCat.1322....0Z; 2013AJ....145...44Z|volume=1322|author1=Zacharias|first1=N.|last2=Finch|first2=C. T.|last3=Girard|first3=T. M.|last4=Henden|first4=A.|last5=Bartlett|first5=J. L.|last6=Monet|first6=D. G.|last7=Zacharias|first7=M. I.|year=2012}}</ref> |
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}} |
}} |
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{{Stars of Octans}} |
{{Stars of Octans}} |
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{{DEFAULTSORT:TYC 9486-927-1}} |
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[[Category:Octans]] |
[[Category:Octans]] |
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[[Category:2MASS objects]] |
[[Category:2MASS objects|J21252752-8138278]] |
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[[Category:Planetary systems with one confirmed planet]] |
[[Category:Planetary systems with one confirmed planet]] |
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[[Category:M-type main-sequence stars]] |
[[Category:M-type main-sequence stars]] |
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[[Category:Multiple star systems|3]] |
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[[Category:Objects with variable star designations|Octantis, FT]] |
Revision as of 20:59, 16 May 2024
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Octans |
Right ascension | 21h 25m 27.4805s[2] |
Declination | −81° 38′ 27.692″[2] |
Apparent magnitude (V) | 11.5 - 12.0[3] |
Characteristics | |
Spectral type | M1 V[4] |
Variable type | BY Dra[3] |
Astrometry | |
Radial velocity (Rv) | 8.7±4.6[4] km/s |
Proper motion (μ) | RA: 60.645(46) mas/yr[2] Dec.: −107.740(48) mas/yr[2] |
Parallax (π) | 29.0266 ± 0.0401 mas[2] |
Distance | 112.4 ± 0.2 ly (34.45 ± 0.05 pc) |
Details | |
Mass | 0.53[5] M☉ |
Radius | 0.46[6] R☉ |
Luminosity | 0.032[6] L☉ |
Surface gravity (log g) | 4.3[7] cgs |
Temperature | 3,490[8] K |
Metallicity [Fe/H] | −1.3[7] dex |
Rotation | 0.541945[3] days |
Rotational velocity (v sin i) | 43.5±1.2[8] km/s |
Age | 10-45[8] Myr |
Other designations | |
2MASS J21252752-8138278, FT Octantis | |
Database references | |
SIMBAD | data |
TYC 9486-927-1 (also known as 2MASS J21252752-8138278) is the primary of a possible trinary star system located at a distance of 34.5 parsecs from Earth in the southern direction in the constellation of Octans. It is a BY Draconis variable, with large starspots causing it to change brightness as it rotates every 13 hours.[3]
TYC 9486-927-1 has rapid rotation and coronal and chromospheric activity suggestive of a young age. Observations and multi-epoch radial velocity data suggest that TYC 9486-927-1 is a single, rapidly rotating star rather than a spectroscopic or tight visual binary. However, it is still possible that TYC 9486-927-1 is an equal mass binary with a face-on orbit and close separation.[4]
The candidate secondary stellar companion is 2MASS J21121598–8128452. It is a red dwarf star of spectral class M5.5. Its projected separation from the primary would be 62,700 AU. The candidate tertiary companion is 2MASS J21192028–8145446 - of spectral class M6 or M7 and at a projected separation of 31,000 AU from the primary.[5]: 7
Planetary system
The planet 2MASS J21265040-8140293 orbits TYC 9486-927-1 at a projected separation of 7400 AU.[5] With a mass from 11.6 to 15 Jupiter masses, it is considered to be either a brown dwarf, or a giant planet.[9][10]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
2MASS J2126–8140/b | 13.3 (± 1.7)[11] MJ | 6,900[8] | 328 725 000[citation needed] | — | — | — |
References
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
- ^ a b c Torres, C. A. O.; Quast, G. R.; Da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.
- ^ a b c Jones, H R A.; Caballero, J. A.; Beamín, J. C.; Barrado, D.; Sarro, L. M.; Marocco, F.; Smart, R. L. (2019), "The Gaia Ultra-Cool Dwarf Sample – II: Structure at the end of the main sequence", Monthly Notices of the Royal Astronomical Society, 485 (3): 4423–4440, arXiv:1902.07571, Bibcode:2019MNRAS.485.4423S, doi:10.1093/mnras/stz678, S2CID 119421722
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ a b Gaidos, E.; et al. (September 2014). "Trumpeting M dwarfs with CONCH-SHELL: a catalogue of nearby cool host-stars for habitable exoplanets and life". Monthly Notices of the Royal Astronomical Society. 443 (3): 2561–2578. arXiv:1406.7353. Bibcode:2014MNRAS.443.2561G. doi:10.1093/mnras/stu1313. S2CID 119234492.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ a b Steinmetz, M.; et al. (2020). "VizieR Online Data Catalog: RAVE 6th data release (Steinmetz+, 2020)". Vizier Online Data Catalog. Bibcode:2020yCat.3283....0S.
- ^ a b c d Deacon, N. R.; Schlieder, J. E.; Murphy, S. J. (2016). "A nearby young M dwarf with a wide, possibly planetary-mass companion". Monthly Notices of the Royal Astronomical Society. 457 (3): 3191. arXiv:1601.06162. Bibcode:2016MNRAS.457.3191D. doi:10.1093/mnras/stw172. S2CID 18220333.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ Gagné, Jonathan; Lafrenière, David; Doyon, René; Malo, Lison; Artigau, Étienne (2014). "BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups with Previously Known Signs of Youth". The Astrophysical Journal. 783 (2): 121. arXiv:1312.5864. Bibcode:2014ApJ...783..121G. doi:10.1088/0004-637X/783/2/121. S2CID 119251619.
- ^ Reid, I. Neill; Cruz, Kelle L.; Kirkpatrick, J. Davy; Allen, Peter R.; Mungall, F.; Liebert, James; Lowrance, Patrick; Sweet, Anne (2008). "Meeting the Cool Neighbors. X. Ultracool Dwarfs from the 2MASS All-Sky Data Release". The Astronomical Journal. 136 (3): 1290. arXiv:0806.3413. Bibcode:2008AJ....136.1290R. doi:10.1088/0004-6256/136/3/1290.
- ^ "Planet 2MASS J2126-8140". Extrasolar Planets Encyclopaedia. Retrieved 2016-01-27.