WISE J1147−2040

{{Starbox begin

|name=WISE J1147−2040

}}

{{Starbox image

| image = 250px

| caption = WISE J1147−2040

| credit = legacy surveys

}}

{{Starbox observe

|epoch=J2000

|equinox=J2000

|constell=Hydra

|ra={{RA|11|47|24.214}}{{cite simbad|title=2MASS J11472421-2040204|accessdate=24 March 2017}}

|dec={{DEC|-20|40|20.44}}

}}

{{Starbox character

|type=Brown dwarf
or a rogue planet

|class=L7V

}}

{{Starbox astrometry

|dist_ly=102 ± 12

|dist_pc=31.3 ± 3.8{{cite journal|doi=10.3847/2041-8205/822/1/L1|title=Wisea J114724.10-204021.3: A Free-Floating Planetary Mass Member of the Tw Hya Association|journal=The Astrophysical Journal|volume=822|pages=L1|year=2016|last1=Schneider|first1=Adam C.|last2=Windsor|first2=James|last3=Cushing|first3=Michael C.|last4=Kirkpatrick|first4=J. Davy|last5=Wright|first5=Edward L.|issue=1 |arxiv = 1603.07985 |bibcode = 2016ApJ...822L...1S |s2cid=30068452 |doi-access=free }}

}}

{{Starbox detail

| mass_mj=5–10{{cite web|url=https://www.msn.com/en-gb/money/technology/nasa-spots-free-floating-brown-dwarf-in-deep-space/ar-BBs6ozz|title=NASA spots free-floating brown dwarf in deep space|publisher=MSN|date=22 April 2016|access-date=30 April 2016|archive-url=https://web.archive.org/web/20160427104159/http://www.msn.com/en-gb/money/technology/nasa-spots-free-floating-brown-dwarf-in-deep-space/ar-BBs6ozz|archive-date=27 April 2016|url-status=dead|df=dmy-all}}

| radius_rj=2.08{{citation needed|date=March 2017}}

| temperature=1500 ± 100 K
1100–1200

| age_myr={{val|7|2.5}}{{cite journal|arxiv=2005.12854 |doi=10.3847/1538-3881/ab9642 |doi-access=free |title=Spitzer Variability Properties of Low-gravity L Dwarfs |date=2020 |last1=Vos |first1=Johanna M. |last2=Biller |first2=Beth A. |last3=Allers |first3=Katelyn N. |last4=Faherty |first4=Jacqueline K. |last5=Liu |first5=Michael C. |last6=Metchev |first6=Stanimir |last7=Eriksson |first7=Simon |last8=Manjavacas |first8=Elena |last9=Dupuy |first9=Trent J. |last10=Janson |first10=Markus |last11=Radigan-Hoffman |first11=Jacqueline |last12=Crossfield |first12=Ian |last13=Bonnefoy |first13=Mickaël |last14=Best |first14=William M. J. |last15=Homeier |first15=Derek |last16=Schlieder |first16=Joshua E. |last17=Brandner |first17=Wolfgang |last18=Henning |first18=Thomas |last19=Bonavita |first19=Mariangela |last20=Buenzli |first20=Esther |journal=The Astronomical Journal |volume=160 |issue=1 |page=38 |bibcode=2020AJ....160...38V }}

}}

{{Starbox catalog

| names=WISEA 1147, 2MASS J11472421−2040204, WISEA J114724.10−204021.3

}}

{{Starbox reference

|Simbad=WISEA+J114724.10-204021.3

}}

{{Starbox end}}

WISEA J114724.10−204021.3 (abbreviated WISEA 1147) is a brown dwarf in the TW Hydrae association, a nearby group of very young stars and brown dwarfs.{{cite news|title=Lone Planetary-Mass Object Found in Family of Stars|url=http://www.nasa.gov/feature/jpl/lone-planetary-mass-object-found-in-family-of-stars|accessdate=21 April 2016|work=NASA|date=19 April 2016}}{{cite news|last1=Kennell|first1=Joanne|title=Astronomers Spot a Lonely Planet-Like Object Floating Freely in Space|url=http://thescienceexplorer.com/universe/astronomers-spot-lonely-planet-object-floating-freely-space|accessdate=21 April 2016|work=The Science Explorer}} The object is notable because its estimate mass, 6±1 times the mass of Jupiter, places it in the mass range for rogue planets.{{cite journal|last1=Best|first1=William M. J.|last2=Liu|first2=Michael C.|last3=Dupuy|first3=Trent J.|last4=Magnier|first4=Eugene A.|title=The Young L Dwarf 2MASS J11193254−1137466 Is a Planetary-mass Binary|journal=The Astrophysical Journal|volume=843|issue=1|year=2017|pages=L4|issn=2041-8213|doi=10.3847/2041-8213/aa76df|arxiv=1706.01883|bibcode=2017ApJ...843L...4B|s2cid=119081444 |doi-access=free }} Nevertheless, it is a free-floating object, unassociated with any star system.{{cite news|last1=Newcomb|first1=Alyssa|title=Lonely Planet Unattached to a Star Found in Deep Space|url=https://abcnews.go.com/Technology/lonely-planet-unattached-star-found-deep-space/story?id=38542912|accessdate=21 April 2016|work=ABC News|date=20 April 2016}}

The object was discovered using information from NASA's WISE (Wide-field Infrared Survey Explorer) and the 2MASS (Two Micron All-Sky Survey). Researchers inferred the young age for WISEA 1147 because it is a member of a group of stars that is only 10 million years old, and they estimated its mass using evolutionary models for brown dwarf cooling.