TRAPPIST-1 Overview

TRAPPIST-1 0.12 R⦿ 2559.00 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 Timing Variations, 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 (TIC v6) Gaia DR2 Grimm et al. 2018 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]
ρ
(g/cm3)
84.5307882±11.2901428 --- ---
71.5+1.7-3.1
70.9+8.0-4.6
M
(M⦿)
0.09077820±0.02000690 --- 0.089±0.007 0.0802±0.0073 0.080±0.009
R
(R⦿)
0.1148270±0.0033573 --- --- 0.1170±0.0036 0.117±0.004
Age
(Gyr)
--- --- --- --- >0.5
Prot
(days)
--- --- --- --- 1.40±0.05
log g
(log10(cm/s2))
5.2759600±0.0719093 --- --- --- ---
Source Gillon et al. 2017 Grimm et al. 2018 de Wit et al. 2016 Gillon et al. 2016
Teq
(K)
400.1±7.7 --- 366 400±9
i
(deg)
89.65+0.22-0.27
--- 89.39±0.32 89.41±0.41
δ
(%)
0.7266±0.0088 --- 0.8015±0.0220 0.754±0.025
T14
(hours)
0.6067±0.0028 --- 0.6020±0.0077 0.6020±0.0077
TC
(days)
2457322.51736±0.00010 --- 2457512.88646±0.00030 2457322.51765±0.00025
ω
(deg)
--- 336.86±34.24 --- ---
Mp
(M)
0.850±0.720
1.017+0.154-0.143
--- ---
Mp
(MJup)
0.00267±0.00227
0.003200+0.000485-0.000450
--- ---
e
<0.081 0.00622±0.00304 --- 0
ρ
(g/cm3)
3.6±3.1
0.9630+0.1220-0.1210
--- ---
Rp
(R)
1.086±0.035
1.121+0.031-0.032
--- 1.113±0.044
Rp
(RJup)
0.09689±0.00312
0.1000+0.0028-0.0029
--- 0.09930±0.00393
a
(au)
0.01111±0.00034 0.011547750±0.000000057 --- 0.01111±0.00040
a/R
20.50+0.16-0.31
--- ---
20.45+0.43-0.81
b
0.126+0.092-0.078
--- --- 0.21±0.14
S
(S)
4.25±0.33 --- --- 4.25±0.38
P
(days)
1.51087081±0.00000060 --- --- 1.510848±0.000019
Source Gillon et al. 2017 Grimm et al. 2018 de Wit et al. 2016 Gillon et al. 2016
Teq
(K)
341.9±6.6 --- 315 342±8
i
(deg)
89.67±0.17 --- 89.58±0.11 89.50±0.31
δ
(%)
0.687±0.010 --- 0.7290±0.0240 0.672±0.042
T14
(hours)
0.7062±0.0037 --- 0.6963±0.0135 0.6963±0.0135
TC
(days)
2457282.80728±0.00019 --- 2457512.88019±0.00016 2457362.72618±0.00033
ω
(deg)
--- 282.45±17.10 --- ---
Mp
(M)
1.38±0.61
1.156+0.142-0.131
--- ---
Mp
(MJup)
0.00434±0.00192
0.003637+0.000447-0.000412
--- ---
e
<0.083 0.00654±0.00188 --- 0
ρ
(g/cm3)
6.45±2.92
1.17+0.11-0.10
--- ---
Rp
(R)
1.056±0.035
1.095+0.030-0.031
--- 1.049±0.050
Rp
(RJup)
0.09421±0.00312
0.09769+0.00268-0.00277
--- 0.09359±0.00446
a
(au)
0.01521±0.00047 0.01581512±0.00000015 --- 0.01522±0.00055
a/R
28.08+0.22-0.42
--- ---
28.0+0.6-1.1
b
0.161+0.076-0.084
--- --- 0.25±0.15
S
(S)
2.27±0.18 --- --- 2.26±0.21
P
(days)
2.4218233±0.0000017 --- --- 2.421848±0.000028
Source Gillon et al. 2017 Grimm et al. 2018
ω
(deg)
--- -8.73±6.17
Mp
(M)
0.41±0.27
0.297+0.039-0.035
Mp
(MJup)
0.0013±0.0008
0.000934+0.000123-0.000110
e
<0.070 0.00837±0.00093
ρ
(g/cm3)
4.9±3.3
0.817+0.089-0.082
Rp
(R)
0.772±0.030 0.784±0.023
Rp
(RJup)
0.0689±0.0027 0.0699±0.0021
a
(au)
0.02144+0.00066-0.00063
0.02228038±0.00000044
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 ---
i
(deg)
89.75±0.16 ---
P
(days)
4.049610±0.000063 ---
δ
(%)
0.367±0.017 ---
T14
(hours)
0.8188±0.0110 ---
TC
(days)
2457670.14165±0.00035 ---
Source Gillon et al. 2017 Grimm et al. 2018
ω
(deg)
--- 108.37±8.47
Mp
(M)
0.62±0.58
0.772+0.079-0.075
Mp
(MJup)
0.0020±0.0018
0.00243+0.00025-0.00024
e
<0.085 0.00510±0.00058
ρ
(g/cm3)
4.4±4.2
1.358+0.101-0.093
Rp
(R)
0.918±0.039
0.910+0.026-0.027
Rp
(RJup)
0.0819±0.0035
0.0812+0.0023-0.0024
a
(au)
0.02817+0.00083-0.00087
0.02928285±0.00000034
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 ---
i
(deg)
89.86+0.10-0.12
---
P
(days)
6.099615±0.000011 ---
δ
(%)
0.519±0.026 ---
T14
(hours)
0.9535±0.0120 ---
TC
(days)
2457660.37859±0.00038 ---
Source Gillon et al. 2017 Grimm et al. 2018
ω
(deg)
--- 368.81±3.11
Mp
(M)
0.68±0.18
0.9340+0.0800-0.0780
Mp
(MJup)
0.0021±0.0006
0.002939+0.000252-0.000245
e
<0.063 0.01007±0.00068
ρ
(g/cm3)
3.30±0.94 1.08±0.05
Rp
(R)
1.045±0.038
1.046+0.029-0.030
Rp
(RJup)
0.09323±0.00339
0.09332+0.00259-0.00268
a
(au)
0.0371±0.0011 0.03853361±0.00000048
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 ---
i
(deg)
89.680±0.034 ---
P
(days)
9.206690±0.000015 ---
δ
(%)
0.673±0.023 ---
T14
(hours)
1.043±0.010 ---
TC
(days)
2457671.39767±0.00023 ---
Source Gillon et al. 2017 Grimm et al. 2018
ω
(deg)
--- 191.34±13.83
Mp
(M)
1.34±0.88
1.148+0.098-0.095
Mp
(MJup)
0.00422±0.00277
0.003612+0.000308-0.000299
e
<0.061 0.00208±0.00058
ρ
(g/cm3)
5.2±3.5
1.01+0.05-0.04
Rp
(R)
1.127±0.041
1.148+0.032-0.033
Rp
(RJup)
0.1005±0.0037
0.1024+0.0029-0.0029
a
(au)
0.0451±0.0014 0.04687692±0.00000032
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 ---
i
(deg)
89.710±0.025 ---
P
(days)
12.35294±0.00012 ---
δ
(%)
0.782±0.027 ---
T14
(hours)
1.140±0.011 ---
TC
(days)
2457665.34937±0.00021 ---
Source Luger et al. 2017 Grimm et al. 2018 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
0.773+0.026-0.027
0.755±0.034
Rp
(RJup)
0.0671+0.0029-0.0028
0.0690+0.0023-0.0024
0.0674±0.0030
Rp/R
0.0588±0.0016 --- ---
δ
(%)
0.346±0.018 --- 0.3520±0.0326
T14
(hours)
1.26±0.02 ---
1.280+0.045-0.033
TC
(days)
2457662.55284±0.00037 --- 2457662.55463±0.00056
ω
(deg)
--- 338.92±9.66 ---
Mp
(M)
---
0.331+0.056-0.049
---
Mp
(MJup)
---
0.00104+0.00018-0.00015
---
e
--- 0.00567±0.00121 ---
ρ
(g/cm3)
---
0.9540+0.1550-0.1350
---
a
(au)
--- 0.06193488±0.00000080
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
System
Star
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