TRAPPIST-1 Overview

TRAPPIST-1 0.12 R⦿ 3352.33 K
TRAPPIST-1 b
0.097 RJup
TRAPPIST-1 c
0.094 RJup
TRAPPIST-1 d
0.069 RJup
TRAPPIST-1 e
0.082 RJup
TRAPPIST-1 f
0.093 RJup
TRAPPIST-1 g
0.101 RJup
TRAPPIST-1 h
0.067 RJup
Discovery Data
Host Planet Method Year Reference Detection
TRAPPIST-1 TRAPPIST-1 b Transit 2016 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 c Transit 2016 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 d Transit 2016 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 e Transit 2017 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 f Transit 2017 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 g Transit 2017 Gillon et al. 2016 Transit Timing Variations, Transit
TRAPPIST-1 TRAPPIST-1 h Transit 2017 Gillon et al. 2016 Transit
TRAPPIST-1
  • Original planet parameters for planet 'd' retracted by Gillon et al. (2017) owing to incorrect period. (Gillon et al. 2016)
TRAPPIST-1 d
  • Omitted semi-major axis, irradiation, equilibrium temperature, ratio of distance to stellar radius (ranges of discrete values given for set of possible periods). See Table 1 of ref. (Gillon et al. 2016)
  • Original planet parameters for planet 'd' retracted by Gillon et al. (2017) owing to incorrect period. (Gillon et al. 2017)
RA
23h06m30.33s
Dec
-05d02m36.46s
Distance
---
Parallax
---
Ecliptic Latitude
0.6332796 deg
Ecliptic Longitude
345.7341 deg
Galactic Latitude
-56.64466 deg
Galactic Longitude
69.71302 deg
Total Proper Motion
1026.5792712±8.0000000 mas/yr
Proper Motion (RA)
901.0±8.0 mas/yr
Proper Motion (Dec)
-492.0±8.0 mas/yr
Photometry
mV
17.02±0.20
mTESS
13.8529000±0.0112926
mJ
11.354±0.022
mH
10.718±0.021
mKs
10.296±0.023
mKep
12.917
Source TICv8 Gaia DR2 Gillon et al. 2017 Gillon et al. 2016
Teff
(K)
---
3352.3333+103.6670-61.8333
2559±50 2550±55
L
(log10(L⦿))
--- ---
-3.28+0.03-0.03
-3.28+0.03-0.03
Metallicity
(dex)
--- --- 0.040±0.080 [Fe/H] 0.040±0.080 [Fe/H]
Age
(Gyr)
--- --- --- >0.5
ρ
(g/cm3)
59.95830±8.00818 ---
71.5+1.7-3.1
70.9+8.0-4.6
M
(M⦿)
0.09077820±0.02000690 --- 0.0802±0.0073 0.080±0.009
R
(R⦿)
0.1148270±0.0033573 --- 0.1170±0.0036 0.117±0.004
Prot
(days)
--- --- --- 1.40±0.05
log g
(log10(cm/s2))
5.2759600±0.0719093 --- --- ---
Source Gillon et al. 2017 de Wit et al. 2016 Gillon et al. 2016
a/R
20.50+0.16-0.31
---
20.45+0.43-0.81
Teq
(K)
400.1±7.7 366 400±9
b
0.126+0.092-0.078
--- 0.21±0.14
S
(S)
4.25±0.33 --- 4.25±0.38
e
<0.081 --- 0
i
(deg)
89.65+0.22-0.27
89.39±0.32 89.41±0.41
P
(days)
1.51087081±0.00000060 --- 1.510848±0.000019
Rp
(R)
1.086±0.035 --- 1.113±0.044
Rp
(RJup)
0.09689±0.00312 --- 0.09930±0.00393
a
(au)
0.01111±0.00034 --- 0.01111±0.00040
δ
(%)
0.7266±0.0088 0.8015±0.0220 0.754±0.025
T14
(hours)
0.02528±0.00012 0.02508±0.00032 0.02508±0.00032
TC
(days)
2457322.51736±0.00010 2457512.88646±0.00030 2457322.51765±0.00025
Mp
(M)
0.850±0.720 --- ---
Mp
(MJup)
0.00267±0.00227 --- ---
ρ
(g/cm3)
3.6±3.1 --- ---
Source Gillon et al. 2017 de Wit et al. 2016 Gillon et al. 2016
a/R
28.08+0.22-0.42
---
28.0+0.6-1.1
Teq
(K)
341.9±6.6 315 342±8
b
0.161+0.076-0.084
--- 0.25±0.15
S
(S)
2.27±0.18 --- 2.26±0.21
e
<0.083 --- 0
i
(deg)
89.67±0.17 89.58±0.11 89.50±0.31
P
(days)
2.4218233±0.0000017 --- 2.421848±0.000028
Rp
(R)
1.056±0.035 --- 1.049±0.050
Rp
(RJup)
0.09421±0.00312 --- 0.09359±0.00446
a
(au)
0.01521±0.00047 --- 0.01522±0.00055
δ
(%)
0.687±0.010 0.7290±0.0240 0.672±0.042
T14
(hours)
0.02942±0.00015 0.02901±0.00056 0.02901±0.00056
TC
(days)
2457282.80728±0.00019 2457512.88019±0.00016 2457362.72618±0.00033
Mp
(M)
1.38±0.61 --- ---
Mp
(MJup)
0.00434±0.00192 --- ---
ρ
(g/cm3)
6.45±2.92 --- ---
Source Gillon et al. 2017
a/R
39.55+0.30-0.59
Teq
(K)
288.0±5.6
b
0.17±0.11
S
(S)
1.143±0.088
Mp
(M)
0.41±0.27
Mp
(MJup)
0.0013±0.0008
e
<0.070
i
(deg)
89.75±0.16
P
(days)
4.049610±0.000063
ρ
(g/cm3)
4.9±3.3
Rp
(R)
0.772±0.030
Rp
(RJup)
0.0689±0.0027
a
(au)
0.02144+0.00066-0.00063
δ
(%)
0.367±0.017
T14
(hours)
0.03412±0.00046
TC
(days)
2457670.14165±0.00035
Source Gillon et al. 2017
a/R
51.97+0.40-0.77
Teq
(K)
251.3±4.9
b
0.12+0.11-0.09
S
(S)
0.662±0.051
Mp
(M)
0.62±0.58
Mp
(MJup)
0.0020±0.0018
e
<0.085
i
(deg)
89.86+0.10-0.12
P
(days)
6.099615±0.000011
ρ
(g/cm3)
4.4±4.2
Rp
(R)
0.918±0.039
Rp
(RJup)
0.0819±0.0035
a
(au)
0.02817+0.00083-0.00087
δ
(%)
0.519±0.026
T14
(hours)
0.03973±0.00050
TC
(days)
2457660.37859±0.00038
Source Gillon et al. 2017
a/R
68.4+0.5-1.0
Teq
(K)
219.0±4.2
b
0.382±0.035
S
(S)
0.382±0.030
Mp
(M)
0.68±0.18
Mp
(MJup)
0.0021±0.0006
e
<0.063
i
(deg)
89.680±0.034
P
(days)
9.206690±0.000015
ρ
(g/cm3)
3.30±0.94
Rp
(R)
1.045±0.038
Rp
(RJup)
0.09323±0.00339
a
(au)
0.0371±0.0011
δ
(%)
0.673±0.023
T14
(hours)
0.04346±0.00042
TC
(days)
2457671.39767±0.00023
Source Gillon et al. 2017
a/R
83.2+0.6-1.2
Teq
(K)
198.6±3.8
b
0.421±0.031
S
(S)
0.258±0.020
Mp
(M)
1.34±0.88
Mp
(MJup)
0.00422±0.00277
e
<0.061
i
(deg)
89.710±0.025
P
(days)
12.35294±0.00012
ρ
(g/cm3)
5.2±3.5
Rp
(R)
1.127±0.041
Rp
(RJup)
0.1005±0.0037
a
(au)
0.0451±0.0014
δ
(%)
0.782±0.027
T14
(hours)
0.04750±0.00046
TC
(days)
2457665.34937±0.00021
Source Luger et al. 2017 Gillon et al. 2017
a/R
109±4
117+50-26
Teq
(K)
173±4
168+21-28
b
0.45+0.06-0.08
0.45+0.22-0.29
S
(S)
0.165±0.025
0.131+0.081-0.067
i
(deg)
89.76+0.05-0.04
89.80+0.10-0.05
P
(days)
18.767+0.004-0.003
20+15-6
Rp
(R)
0.752+0.032-0.031
0.755±0.034
Rp
(RJup)
0.0671+0.0029-0.0028
0.0674±0.0030
Rp/R
0.0588±0.0016 ---
δ
(%)
0.346±0.018 0.3520±0.0326
T14
(hours)
0.0525±0.0008
0.05333+0.00187-0.00137
TC
(days)
2457662.55284±0.00037 2457662.55463±0.00056
a
(au)
---
0.063+0.027-0.013
Known Objects
7 Confirmed Planets
1 K2 Targets
1 2MASS Point Source Catalog
Data Files
1 K2 Time Series
7 Associated Literature Data
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