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 2017-07-16
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

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

Astrometric Constraints on the Masses of Long-Period Gas Giant Planets in the TRAPPIST-1 Planetary System
2017 BOSS A., WEINBERGER A., KEISER S., ASTRAATMADJA T., ANGLADA-ESCUDE G. & THOMPSON I.
Astron. J., in press
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

The Threatening Environment of the TRAPPIST-1 Planets
2017 GARRAFFO C., DRAKE J., COHEN O., ALVARO-GOMEZ J. & MOSCHOU S.
ApJ Lett, 843, L33
paper  arxiv  

Comparative Climates of TRAPPIST-1 planetary system: results from a simple climate-vegetation model
2017 ALBERTI T., CARBONE V., LEPRETI F. & VECCHIO A.
ApJ, accepted
arxiv  

Reconnaissance of the TRAPPIST-1 exoplanet system in the Lyman-α line
2017 BOURRIER, V., EHRENREICH, D., WHEATLEY, P. & 7 additional authors
Astron. & Astrophys., 599, L3
arxiv  paper   ADS  

Reduced Diversity of Life Around Proxima Centauri and TRAPPIST-1
2017 LINGAM M. & LOEB A.
ApJ, submitted
arxiv   paper   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, 468, 2672
paper  arxiv  ADS

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, 839, L1
paper  arxiv  ADS

Formation of TRAPPIST-1 and other compact systems
2017 ORMEL Ch., LIU B. & SCHOONENBERG D.
Astron. & Astrophys., 604, A1
paper  arxiv   paper   ADS  

Frequent flaring in the TRAPPIST-1 system - unsuited for life?
2017 VIDA K., KOVARI Z., PAL A., OLAH K. & KRISKOVICS L.
ApJ, submitted
arxiv  

A revolution is brewing: observations of TRAPPIST-1 exoplanetary system fosters a new biomarker
2017 TURBO-KING M., TANG B., HEBEERTABLE Z., CHOUFFE M., EXQUISIT B. & KEG-BEER L.
J. of Astrobiol.
arxiv  

Fast litho-panspermia in the habitable zone of the TRAPPIST-1 system
2017 KRIJT S., BOWLING T., LYONS R., & CIESLA F.
ApJ. Letters, 839, L21
paper  arxiv  ADS

Worlds Without Moons: Exomoon Constraints for Compact Planetary Systems
2017 KANE S.
ApJ. Letters, accepted
arxiv  

Plausible Compositions of the Seven TRAPPIST-1 Planets Using Long-term Dynamical Simulations
2017 QUARLES B., QUINTANA E., LOPEZ E., SCHLIEDER J. & BARCLAY Th.
ApJ. Letters, 842, L5
paper  arxiv  

Limits on the Stability of TRAPPIST-1
2017 TAMAYO D., REIN H., PETROVICH C. & MURRAY N.
ApJ, submitted
arxiv  

Updated Masses for the TRAPPIST-1 Planets
2017 WANG S., WU D.-H., BARVLAY Th. & LAUGHLIN G.
ApJ, submitted
arxiv  

Convergent Migration Renders TRAPPIST-1 Long-lived
2017 TAMAYO D., REIN H., PETROVICH C. & MURRAY N.
ApJ. Letters, 840, L19
paper  arxiv   ADS

Atmospheric escape from the TRAPPIST-1 planets and implications for habitability
2017 DONG Ch. JIN M., LINGAM M., AIRAPETIAN V., MA Y. &van der HOLST B.
arxiv  

On the Spin States of Habitable Zone Exoplanets Around M Dwarfs: The Effect of a Near-Resonant Companion
2017 VINSON A. & HANSEN B.
MNRAS, submitted
arxiv  

On the Age of the TRAPPIST-1 System
2017 BURGASSER A. & MAMAJEK E.
ApJ, submitted
arxiv  

Constraining the Compositions of the TRAPPIST-1 Planets to Trace Snow Lines and Migration in M Dwarf Disks
2017 UNTERBORN C., DESCH S., HINKEL N. & LORENZO A.
ApJ
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