Planet TRAPPIST-1 d

Name TRAPPIST-1 d
Planet Status Confirmed
Discovered in 2016
Mass 0.0013 (± 0.00085) MJ
Mass*sin(i)
Semi-Major Axis 0.02144 ( -0.00063 +0.00066 ) AU
Orbital Period 4.04961 (± 6.3e-05) JD
Eccentricity 0.0 ( -0.0 +0.7 )
ω
Tperi
Radius 0.0689 (± 0.0027) RJ
Inclination 89.75 (± 0.16) deg
Update 2017-02-22
Detection Method Primary Transit
Mass Detection Method TTV
Radius Detection Method Primary Transit
Molecules
Primary transit 2457670.14165 (± 0.00035) JD
Secondary transit
λ
Impact Parameter b 0.17 (± 0.11)
Time Vr=0
Velocity Semiamplitude K
Calculated temperature 288.0 (± 5.6) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Star

TRAPPIST-1
Name TRAPPIST-1
Distance 12.1 (± 0.4) pc
Spectral type M8
Apparent magnitude V 18.8
Mass 0.08 (± 0.009) MSun
Age 0.5 Gyr
Effective temperature 2550.0 (± 55.0) K
Radius 0.117 (± 0.004) RSun
Metallicity [Fe/H] 0.04 (± 0.08)
Detected Disc
Magnetic Field
RA2000 23:06:29.0
Dec2000 -05:02:29
Alternate Names 2MASS J23062928-0502285
Planetary system
7 planets

More data

Observability Predictor

Remarks

3 May 2016: The period and semi-amjor axis of planet TRAPPIST-1 d are very uncertain with multiple solutions. The period 18 days is currently priviledged (Gillon et al. 2016). Further observations are planed with Hubble and Kepler 2.

Related publications

Formation of TRAPPIST-1 and other compact systems
2017 ORMEL Ch., LIU B. & SCHOONENBERG D.
Astron. & Astrophys., submitted
arxiv  

Water loss from Earth-sized planets in the habitable zones of ultracool dwarfs: Implications for the planets of TRAPPIST-1
2017 BOLMONT E., SELSIS F., OWEN J., RIBAS I., RAYMOND S. et al.
MNRAS, 464, 3728
paper  arxiv  ADS

Strong XUV irradiation of the Earth-sized exoplanets orbiting the ultracool dwarf TRAPPIST-1
2017 WHEATLEY P., LOUDEN T., BOURRIER V., EHRENREICH D. & GILLON M.
MNRAS, 465, L69
paper  arxiv  ADS

Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
2017 GILLON M., TRIAUD A., DEMORY B.-O. et al.
Nature, 542, 456
paper  arxiv   ADS

Enhanced interplanetary panspermia in the TRAPPIST-1 system
2017 LINGAM M. & LOEB A.
PNAS, submitted
arxiv  

Eclipse, transit and occultation geometry of planetary systems at exo-syzygy
2017 VERAS D. & BREEDT E.
MNRAS, accepted
arxiv  

Exponential Distance Relation and Near Resonances in the Trappist-1 Planetary System
2017 PLETSER V. & BASANO L.
arxiv  

Assessing the Habitability of the TRAPPIST-1 System Using a 3D Climate Model
2017 WOLF E.
ApJ. Letters, submitted
arxiv  

Habitable worlds with JWST: transit spectroscopy of the TRAPPIST-1 system?
2016 BARSTOW J. & IRWIN J.
MNRAS, 461, L92
paper  arxiv  ADS  

Speckle Imaging Excludes Low-Mass Companions Orbiting the Exoplanet Host Star TRAPPIST-1
2016 HOWELL S., EVERETT M., HORCH E., WINTERS J., HIRSCH L. et al.
ApJ. Letters, 929, L2
paper  

Speckle Imaging Excludes Low-Mass Companions Orbiting the Exoplanet Host Star TRAPPIST-1
2016 HOWELL,S., EVERETT, M., HORCH, E. & 4 additional authors
ApJL, 829, L2
arxiv  paper   ADS  

Temperate Earth-sized planets transiting a nearby ultracool dwarf star
2016 GILLON M., JEHIN E., LEDERER S., DELREZ L., de WIT J. et al.
Nature, 533, 221
paper  arxiv   ADS