TRAPPIST-1 planetary system

GPTKB entity

Predicate	Object
gptkbp:instanceOf	concert hall
gptkbp:announced	22 February 2017
gptkbp:apparentMagnitude	18.8
gptkbp:catalogue	gptkb:2MASS_J23062928-0502285
gptkbp:containsPlanet	gptkb:TRAPPIST-1b gptkb:TRAPPIST-1c gptkb:TRAPPIST-1d gptkb:TRAPPIST-1e gptkb:TRAPPIST-1f gptkb:TRAPPIST-1g gptkb:TRAPPIST-1h
gptkbp:discoveredBy	gptkb:Michaël_Gillon gptkb:TRAPPIST_team
gptkbp:discoveredIn	2016
gptkbp:discoveryMethod	transit method
gptkbp:distanceFromEarth	about 39.6 light-years
gptkbp:hasTelescope	gptkb:Spitzer_Space_Telescope gptkb:Hubble_Space_Telescope gptkb:TRAPPIST_telescope gptkb:VLT
gptkbp:hostedBy	gptkb:TRAPPIST-1 ultra-cool dwarf
gptkbp:hostStarMass	about 0.089 solar masses
gptkbp:hostStarMetallicity	[Fe/H] = 0.04
gptkbp:hostStarOtherNames	gptkb:2MASS_J23062928-0502285 gptkb:EPIC_246199087 gptkb:K2-112
gptkbp:hostStarRadius	about 0.121 solar radii
gptkbp:hostStarTemperature	about 2550 K
https://www.w3.org/2000/01/rdf-schema#label	TRAPPIST-1 planetary system
gptkbp:locatedIn	gptkb:constellation_Aquarius
gptkbp:notableFor	having seven Earth-sized exoplanets three planets in habitable zone
gptkbp:orbitalResonance	planets in near-resonant chain
gptkbp:planetaryOrbits	very close to host star
gptkbp:planetarySizes	all planets Earth-sized
gptkbp:potentiallyHabitable	considered high for some planets
gptkbp:rating	7
gptkbp:spectralType	M8V
gptkbp:bfsParent	gptkb:European_Southern_Observatory
gptkbp:bfsLayer	4