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'''TOI-178''' is a [[planetary system]] in the [[constellation]] [[Sculptor (constellation)|Sculptor]],<ref name="Roman1987">{{Cite journal|last=Roman|first=Nancy G.|year=1987|title=Identification of a Constellation From a Position|url=http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx|journal=Publications of the Astronomical Society of the Pacific|volume=99|issue=617|page=695–699|bibcode=1987PASP...99..695R|doi=10.1086/132034}}. [http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-ref=VIZ5e1c7bb21397f&-out.add=.&-source=VI/42/out&-c=005.7476%20-31.1454,eq=B1875,rs=2 Requête spécifique à TOI-178] sur [[VizieR]].</ref> which appears to have at least 5 planets in a chain of [[Orbital resonance|Laplace resonances]]. That is one of the longest chains yet discovered in a system of planets. The system also has unusual variations in the densities among the planets.<ref name=":0">{{Cite web|last=Plait|first=Phil|date=2021-01-25|title=A six-planet system dances in time to the tune of gravity|url=https://www.syfy.com/syfywire/a-six-planet-system-dances-in-time-to-the-tune-of-gravity|access-date=2021-01-27|website=SYFY WIRE|language=en}}</ref><ref name=":2">{{Cite web|title=Nearby Orange Dwarf Hosts Unique System of Six Planets {{!}} Astronomy {{!}} Sci-News.com|url=http://www.sci-news.com/astronomy/orange-dwarf-toi-178-system-six-planets-09284.html|access-date=2021-01-27|website=Breaking Science News {{!}} Sci-News.com|language=en-US}}</ref><ref name=":1">{{Cite journal|last=Leleu|first=A.|last2=Alibert|first2=Y.|last3=Hara|first3=N. C.|last4=Hooton|first4=M. J.|last5=Wilson|first5=T. G.|last6=Robutel|first6=P.|last7=Delisle|first7=J.-B.|last8=Laskar|first8=J.|last9=Hoyer|first9=S.|last10=Lovis|first10=C.|last11=Bryant|first11=E. M.|date=2021-01-20|title=Six transiting planets and a chain of Laplace resonances in TOI-178|url=https://www.aanda.org/articles/aa/abs/forth/aa39767-20/aa39767-20.html|journal=Astronomy & Astrophysics|language=en|arxiv=2101.09260|doi=10.1051/0004-6361/202039767|issn=0004-6361}}</ref> |
'''TOI-178''' is a [[planetary system]] in the [[constellation]] [[Sculptor (constellation)|Sculptor]],<ref name="Roman1987">{{Cite journal|last=Roman|first=Nancy G.|year=1987|title=Identification of a Constellation From a Position|url=http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx|journal=Publications of the Astronomical Society of the Pacific|volume=99|issue=617|page=695–699|bibcode=1987PASP...99..695R|doi=10.1086/132034}}. [http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-ref=VIZ5e1c7bb21397f&-out.add=.&-source=VI/42/out&-c=005.7476%20-31.1454,eq=B1875,rs=2 Requête spécifique à TOI-178] sur [[VizieR]].</ref> which appears to have at least 5 planets in a chain of [[Orbital resonance|Laplace resonances]]. That is one of the longest chains yet discovered in a system of planets. The system also has unusual variations in the densities among the planets.<ref name=":0">{{Cite web|last=Plait|first=Phil|date=2021-01-25|title=A six-planet system dances in time to the tune of gravity|url=https://www.syfy.com/syfywire/a-six-planet-system-dances-in-time-to-the-tune-of-gravity|access-date=2021-01-27|website=SYFY WIRE|language=en}}</ref><ref name=":2">{{Cite web|title=Nearby Orange Dwarf Hosts Unique System of Six Planets {{!}} Astronomy {{!}} Sci-News.com|url=http://www.sci-news.com/astronomy/orange-dwarf-toi-178-system-six-planets-09284.html|access-date=2021-01-27|website=Breaking Science News {{!}} Sci-News.com|language=en-US}}</ref><ref name=":1">{{Cite journal|last=Leleu|first=A.|last2=Alibert|first2=Y.|last3=Hara|first3=N. C.|last4=Hooton|first4=M. J.|last5=Wilson|first5=T. G.|last6=Robutel|first6=P.|last7=Delisle|first7=J.-B.|last8=Laskar|first8=J.|last9=Hoyer|first9=S.|last10=Lovis|first10=C.|last11=Bryant|first11=E. M.|date=2021-01-20|title=Six transiting planets and a chain of Laplace resonances in TOI-178|url=https://www.aanda.org/articles/aa/abs/forth/aa39767-20/aa39767-20.html|journal=Astronomy & Astrophysics|language=en|arxiv=2101.09260|doi=10.1051/0004-6361/202039767|issn=0004-6361}}</ref> |
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The planets are named from TOI-178b through to TOI-178g, according to the International Astronomical Union (IAU) defined [[exoplanet naming convention]]. The periods of the planets, in days, revolving around the star are b = 1.91, c = 3.24, d = 6.56, e = 9.96, f = 15.23, and g = 20.71. Planets c through g are said to be related via an 12:9:6:4:2 chain of resonance, since, for example, planet c goes around about 12 times for every |
The planets are named from TOI-178b through to TOI-178g, according to the International Astronomical Union (IAU) defined [[exoplanet naming convention]]. The periods of the planets, in days, revolving around the star are b = 1.91, c = 3.24, d = 6.56, e = 9.96, f = 15.23, and g = 20.71. Planets c through g are said to be related via an 12:9:6:4:2 chain of resonance, since, for example, planet c goes around about 12 times for every 2 revolutions of planet g. |
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The system is about 205 [[Light-year|light-years]] away, which is relatively close, implying that such systems may be relatively common.<ref name=":2" /><ref name=":0" /> The brightness of the star, TOI-178a, facilitates followup observations, which make it an ideal system in which to expand our understanding of planet formation and evolution.<ref name=":1" /> |
The system is about 205 [[Light-year|light-years]] away, which is relatively close, implying that such systems may be relatively common.<ref name=":2" /><ref name=":0" /> The brightness of the star, TOI-178a, facilitates followup observations, which make it an ideal system in which to expand our understanding of planet formation and evolution.<ref name=":1" /> |
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Revision as of 09:41, 28 January 2021
TOI-178 is a planetary system in the constellation Sculptor,[1] which appears to have at least 5 planets in a chain of Laplace resonances. That is one of the longest chains yet discovered in a system of planets. The system also has unusual variations in the densities among the planets.[2][3][4]
The planets are named from TOI-178b through to TOI-178g, according to the International Astronomical Union (IAU) defined exoplanet naming convention. The periods of the planets, in days, revolving around the star are b = 1.91, c = 3.24, d = 6.56, e = 9.96, f = 15.23, and g = 20.71. Planets c through g are said to be related via an 12:9:6:4:2 chain of resonance, since, for example, planet c goes around about 12 times for every 2 revolutions of planet g.
The system is about 205 light-years away, which is relatively close, implying that such systems may be relatively common.[3][2] The brightness of the star, TOI-178a, facilitates followup observations, which make it an ideal system in which to expand our understanding of planet formation and evolution.[4]
References
- ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034.. Requête spécifique à TOI-178 sur VizieR.
- ^ a b Plait, Phil (2021-01-25). "A six-planet system dances in time to the tune of gravity". SYFY WIRE. Retrieved 2021-01-27.
- ^ a b "Nearby Orange Dwarf Hosts Unique System of Six Planets | Astronomy | Sci-News.com". Breaking Science News | Sci-News.com. Retrieved 2021-01-27.
- ^ a b Leleu, A.; Alibert, Y.; Hara, N. C.; Hooton, M. J.; Wilson, T. G.; Robutel, P.; Delisle, J.-B.; Laskar, J.; Hoyer, S.; Lovis, C.; Bryant, E. M. (2021-01-20). "Six transiting planets and a chain of Laplace resonances in TOI-178". Astronomy & Astrophysics. arXiv:2101.09260. doi:10.1051/0004-6361/202039767. ISSN 0004-6361.
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