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TRAPPIST-1 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/TRAPPIST-1 b

Confirmed exoplanet · Terrestrial

TRAPPIST-1 b

Orbiting TRAPPIST-1

Discovered in 2016 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Rocky exoplanet TRAPPIST-1 b (illustration), an official ESA/Webb exoplanet image or artist concept — Sourced object or system artworkNASA, ESA, CSA, J. Olmsted (STScI), T. P. Greene (NASA Ames), T. Bell (BAERI), E. Ducrot (CEA), P. Lagage (CEA)

Discovery: 2,016
Method: Transit
Radius: 1.116 R⊕
Mass: 1.374 M⊕
Orbit: 1.510826 days
Distance: 12.429889 pc

Planet profile

Orbit and physical properties

Orbital period: 1.510826 days
Semi-major axis: 0.01154 AU
Eccentricity: 0.00622
Radius: 1.116 Earth radii
Mass: 1.374 Earth masses
Mass provenance: Mass
Density: 5.441939 g/cm³
Equilibrium temperature: 397.6 K
Insolation: 4.153 Earth flux

Host system

Star and system properties

Host star: TRAPPIST-1
Stars in system: 1
Known planets in system: 7
Spectral type: M8.0 V
Stellar temperature: 2,566 K
Stellar radius: 0.1192 R☉
Stellar mass: 0.0898 M☉
Stellar metallicity: 0.052 dex
Stellar age: 7.6 Gyr
Distance: 12.429889 parsecs
Right ascension: 23h06m30.33s
Declination: -05d02m36.46s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,016
Publication date: 2016-05
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 0.60 m Transiting Planets and Planetesimals Small Telescope
Instrument: TRAPPISTCAM
NASA Exoplanet Archive: Open composite record ↗

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