TRAPPIST-1b: Difference between revisions
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{{Planetbox orbit |
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| semimajor=0.01111 |
| semimajor={{nowrap|0.01111 ± 0.00034}}<ref name="Gillon2017"/> |
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| eccentricity= 0. |
| eccentricity= <0.081<ref name="Gillon2017"/> |
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| inclination=89.41 (± 0.41)<ref name=Exoplanet.eu/> |
| inclination=89.41 (± 0.41)<ref name=Exoplanet.eu/> |
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| period= 1.510848 (± 1.9e-05)<ref name=Exoplanet.eu/> |
| period= 1.510848 (± 1.9e-05)<ref name=Exoplanet.eu/> |
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| mass_earth = 0.85<ref name="Gillon2017"/> |
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| minimum_mass_earth = 0.13<ref name="Gillon2017"/> |
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| maximum_mass_earth = 1.57<ref name="Gillon2017"/> |
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| radius_earth = {{nowrap|1.086 ± 0.035}}<ref name="Gillon2017"/> |
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| density_cgs = {{nowrap|3.64 ± 3.09}} |
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| stellar_flux = {{nowrap|4.25 ± 0.33}}<ref name="Gillon2017"/> |
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| bond_albedo = <!--the amount of starlight reflected from the planet and its atmosphere --> |
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| geometric_albedo = <!--geometric albedo of the planet --> |
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| gravity = <!--surface gravity in m/s²--> |
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| gravity_earth = ~0.72 |
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| temperature = {{nowrap|400.1 ± 7.7}}<ref name="Gillon2017"/> |
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==References== |
==References== |
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{{Reflist |
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<ref name="Gillon2017">{{Cite journal|last=Gillon|first=Michaël|last2=Triaud|first2=Amaury H. M. J.|last3=Demory|first3=Brice-Olivier|last4=Jehin|first4=Emmanuël|last5=Agol|first5=Eric|last6=Deck|first6=Katherine M.|last7=Lederer|first7=Susan M.|last8=Wit|first8=Julien de|last9=Burdanov|first9=Artem|title=Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1|url=http://www.nature.com/doifinder/10.1038/nature21360|journal=Nature|volume=542|issue=7642|pages=456–460|arxiv=1703.01424|doi=10.1038/nature21360}}</ref> |
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{{TRAPPIST-1}} |
{{TRAPPIST-1}} |
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Revision as of 02:18, 21 March 2017
Template:Planetbox begin Template:Planetbox image Template:Planetbox star Template:Planetbox orbit Template:Planetbox character Template:Planetbox discovery Template:Planetbox end
TRAPPIST-1b, also designated as 2MASS J23062928-0502285 b, is an exoplanet orbiting around the ultra-cool dwarf star TRAPPIST-1, located approximately 39 light-years (12 parsecs) away in the constellation Aquarius. The planet was detected using the transit method, where a planet dims the host star's light as it passes in front of it. It was first announced on May 2, 2016.
Habitability
During formation of the system it is possible that water loss during pre-HZ periods occurred.[1] It is estimated that TRAPPIST-1b and TRAPPIST-1c may have lost up to four Earth oceans, possibly compromising its habitability, however TRAPPIST-1d may have been able to keep enough liquid water to sustain life.[1]
Spectrum of TRAPPIST-1 b and c
The combined transmission spectrum of TRAPPIST-1 b and c rules out a cloud-free hydrogen-dominated atmosphere for each planet, so they are unlikely to harbor an extended gas envelope. Other atmospheres, from a cloud-free water vapor atmosphere to a Venus-like atmosphere, remain consistent with the featureless spectrum.[2]
Gallery
-
![Artist's view of planets transiting red dwarf star in TRAPPIST-1 system[3]](//upload.wikimedia.org/wikipedia/commons/thumb/5/50/Artist%27s_view_of_planets_transiting_red_dwarf_star_in_TRAPPIST-1_system.jpg/200px-Artist%27s_view_of_planets_transiting_red_dwarf_star_in_TRAPPIST-1_system.jpg)
Artist's view of planets transiting red dwarf star in TRAPPIST-1 system[3] -
The Sun and the ultracool dwarf star TRAPPIST-1 to scale. The faint star has only 11% of the diameter of the Sun and is much redder in colour. -
Artist's impression of three of the planets (b, c, and d) orbiting TRAPPIST-1 -
Artist’s impression video, near one of the three planets orbiting TRAPPIST-1. One of the inner planets is shown in transit across the disc of its tiny and dim parent star.
![Artist's view of planets transiting red dwarf star in TRAPPIST-1 system[3]](/wiki/File:Artist%27s_view_of_planets_transiting_red_dwarf_star_in_TRAPPIST-1_system.jpg)
References
- ^ a b Bolmont, Emeline; Selsis, Franck; Owen, James E.; Ribas, Ignasi; Raymond, Sean N.; Leconte, Jérémy; Gillon, Michael (2016). "Water loss from Earth-sized planets in the habitable zones of ultracool dwarfs: Implications for the planets of TRAPPIST-1". arXiv:1605.00616 [astro-ph.EP].
- ^ de Wit, Julien; et al. (2016). "A combined transmission spectrum of the Earth-sized exoplanets TRAPPIST-1 b and c". Preprint. arXiv:1606.01103.
{{cite journal}}: Explicit use of et al. in:|last2=(help) - ^ "Artist's view of planets transiting red dwarf star in TRAPPIST-1 system". www.spacetelescope.org. Retrieved 21 July 2016.
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