G 196-3
{{short description|Star in the constellation Ursa Major}}
{{Starbox begin
| name= G 196-3
}}
{{Starbox observe
| epoch = J2000
| constell = Ursa Major
| appmag_v = 13.3
}}
{{Starbox character
| class = M3V
| b-v = +1.16
| u-b = +1.67
| variable=
}}
{{Starbox astrometry
| radial_v = 11.7
| prop_mo_ra = {{val|−141.177|0.055}}
| prop_mo_dec = {{val|−202.394|0.053}}
| parallax = 45.8611
| p_error = 0.0388
| absmag_v = 13.33
}}
{{Starbox catalog
| names = TYC 3440-13-1, NLTT 23293
}}
{{Starbox reference
| Simbad = G+196-3
| ARICNS =
}}
{{Starbox end}}
G 196-3 is a young low-mass M dwarf type star which is about 100 million years old. The star is located within the Ursa Major constellation about 71.1 light years away from the Earth. During observations by Instituto de Astrofísica de Canarias in Tenerife, Spain in 1998, a substellar-mass object was discovered to orbit approximately 300 astronomical units (AU) from the star. It was detected using direct imaging.{{cite journal |doi=10.1126/science.282.5392.1309 |journal=Science |volume=282 |issue=5392 |title=Discovery of a Low-Mass Brown Dwarf Companion of the Young Nearby Star G 196-3 |arxiv=astro-ph/9811413 |author=Rafael Rebolo |display-authors=etal |date=1998 |pages=1309–1312 |pmid=9812893 |bibcode=1998Sci...282.1309R |s2cid=10595230 }}{{cite conference |doi=10.1007/978-3-642-56672-1_12 |title=Low-Luminosity Companions to Nearby Stars: Status of the 2MASS Data Search |book-title=Ultracool Dwarfs: New Spectral Types L and T |editor1=Jones, Hugh R. A. |editor2=Steele, Iain A. |location=Berlin/Heidelberg |publisher=Springer |bibcode=2001udns.conf..125K |last1=Kirkpatrick |first1=J. Davy |last2=Gizis |first2=John E. |last3=Burgasser |first3=Adam J. |last4=Wilson |first4=John C. |last5=Dahn |first5=Conard C. |last6=Monet |first6=David G. |last7=Reid |first7=I. Neill |last8=Liebert |first8=James |date=2001 |pages=125 |isbn=978-3-642-56672-1 }}{{cite simbad|title=G 196-3| access-date=2010-02-18 }}{{cite web|title=Lowell Proper Motion Survey 8991 Northern Stars (Giclas 1971) ReadMe| url=http://vizier.u-strasbg.fr/viz-bin/VizieR-S?G%20196-3A|work=Centre de Donnes Astronomiques|access-date=2010-02-09}}
Substellar companion
Observations of the substellar object were performed on January 25, 1998 where a faint red companion was present 16.2 arc seconds southwest of the star. A comparison of images taken at different wavelengths was done using low-intermediate-resolution spectroscopy confirmed the presence of a substellar object which was named G 196-3B. The Further observations confirmed the discovery when the team of Rafael Rebolo obtained R & I broadband photometry on March 19, 1998. The TCS Telescope showed its very cool nature in near-infrared (K Band). The comparison of the optical and infrared magnitudes including dust condensation has allowed astronomers to conclude that the substellar object was 25–10+15 Jupiter masses or simply 25 masses that of the Jovian-planet Jupiter. This was the second{{cite web|title=G196-3B : the second discovery of a brown dwarf around a low-mass star| url=http://www.iac.es/telescopes/cain/cain_resultados.html#G196-3B%20:%20the%20second%20discovery%20of%20a%20brown%20dwarf%20around%20a%20low-ma|work=Instituto de Astrofísica de Canarias (IAC)|access-date=2010-02-22}}{{cite journal|title=Lithium in Brown Dwarfs |page=299| bibcode=2000IAUS..198..299R|author=R. Rebolo|journal=The Light Elements and Their Evolution, Proceedings of IAU Symposium 198, Held 22-26 Nov 1999, Natal, Brazil. Edited by L. Da Silva, R. De Medeiros, & M Spite, 2000|volume=198|date=2000}} discovery of a brown dwarf that was found around a low-mass star whose age{{cite web|title=ING Scientific Highlights in 1998|url=http://www.ing.iac.es/PR/AR1998/high_98.html|work=Isaac Newton Group of Telescopes|access-date=2010-02-18}} was relatively young. The separation of the star and the substellar object has suggested that both were parts of a fragment from a collapsing cloud although another possible scenario suggests that it originated from a dissipated protoplanetary disk.{{cite web|title=Resultados más relevantes|url= http://www.iac.es/telescopes/cain/cain_resultados.html| work=IAC|access-date=2010-02-18}}{{cite web|title=196-3B |url=http://www.extrasolar.net/planettour.asp?StarCatID=browndwarf&PlanetID=98 |work=ExtraSolar.net |access-date=2010-02-18 |url-status=dead |archive-url=https://web.archive.org/web/20100921160746/http://extrasolar.net/planettour.asp?StarCatID=browndwarf&PlanetID=98 |archive-date=2010-09-21 }}{{cite journal|doi= 10.1086/379849|last1= McGovern|first1= Mark R.|last2= Kirkpatrick|first2= J. Davy|last3= McLean|first3= Ian S.|last4= Burgasser|first4= Adam J.|last5= Prato|first5= L.|last6= Lowrance|first6= Patrick J.|title= Identifying Young Brown Dwarfs Using Gravity-Sensitive Spectral Features|url= http://www.iop.org/EJ/article/0004-637X/600/2/1020/17726.text.html|journal= The Astrophysical Journal|volume=600|issue= 2|pages=1020–1024|date=2004|bibcode=2004ApJ...600.1020M|arxiv = astro-ph/0309634 |s2cid= 475796}}{{cite journal|title=Discovery of Young Dwarf L Binary|author1=Allers|author2=Liu|author3=Dupuy|author4=Cushing|date=2009|volume=715|issue=561|pages=561–571|journal=Astrophysical Journal|arxiv=0912.4687|bibcode = 2010ApJ...715..561A |doi = 10.1088/0004-637X/715/1/561 |s2cid=116058913}}{{cite simbad|title=2MASSW J1004207+502300|access-date=2010-02-18}}
{{OrbitboxPlanet begin
|table_ref={{Cite Exoplanet Archive|title=G 196-3|acess-date=2024-07-25}}{{Cite journal |last=Filippazzo |first=Joseph C. |last2=Rice |first2=Emily L. |last3=Faherty |first3=Jacqueline |last4=Cruz |first4=Kelle L. |last5=Van Gordon |first5=Mollie M. |last6=Looper |first6=Dagny L. |date=2015-09-10 |title=Fundamental Parameters and Spectral Energy Distributions of Young and Field Age Objects with Masses Spanning the Stellar to Planetary Regime |arxiv=1508.01767 |journal=The Astrophysical Journal |volume=810 |issue=2 |pages=158 |doi=10.1088/0004-637X/810/2/158 |issn=1538-4357}}
}}
{{OrbitboxPlanet
| exoplanet = B
| mass = {{val|26|1}}
| radius = {{val|1.36|0.23}}
| semimajor = {{val|350|1}}
| period =
| eccentricity =
}}
{{Orbitbox end}}