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TOI-270 Overview

TOI-270 0.38 R⦿ 3886.16 K
TOI-270 b
0.114 RJup
TOI-270 c
0.208 RJup
TOI-270 d
0.178 RJup

TOI-270 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
TOI-270
TOI-270 b 3.36 d 1.28 R⨁ Transit 2019 Günther et al. 2019 Confirmed Planet
TOI-270 c 5.66 d 2.33 R⨁ Transit 2019 Günther et al. 2019 Confirmed Planet
TOI-270 d 11.38 d 2 R⨁ Transit 2019 Günther et al. 2019 Confirmed Planet
TOI-270 b TOI-270 c TOI-270 d
RA
04h33m39.86s
Dec
-51d57m26.62s
Distance
22.47930±0.01355 pc
Parallax
44.4565000±0.0265906 mas
Ecliptic Latitude
-71.89822 deg
Ecliptic Longitude
43.14225 deg
Galactic Latitude
-42.01396 deg
Galactic Longitude
259.77379 deg
Total Proper Motion
282.2188579±0.0506032 mas/yr
Proper Motion (RA)
82.9441000±0.0496865 mas/yr
Proper Motion (Dec)
-269.755000±0.050689 mas/yr
Photometry
mV
12.603±0.039
mTESS
10.4981000±0.0073581
mJ
9.099±0.032
mH
8.531±0.073
mKs
8.251±0.029
mW1
8.130±0.022
mW2
7.983±0.019
mW3
7.887±0.016
mW4
7.691±0.089
mGaia
11.630600±0.000476
mB
14.194±0.043
mg
13.391±0.020
mi
10.910±0.059
mr
12.011±0.020
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
Stellar Hosts
Source Coulombe et al. 2025 Mikal-Evans et al. 2023 Kaye et al. 2022 Van Eylen et al. 2021 TICv8 Günther et al. 2019 Gaia DR2 ExoFOP ExoFOP ExoFOP
Teff
(K)
3506±70 --- 3506±70 3506±70 3532.0±157.0
3386+137-131
3886.155+173.572-97.435
 3551±74 3551±74 3551±74
L✶
(log10(L⦿))
--- --- ---
-1.71+0.04-0.04
-1.70665+0.09358-0.11945
-1.8+0.0-0.1
 --- --- --- ---
Metallicity
(dex)
--- --- --- -0.20±0.12 [Fe/H] --- -0.17±0.10 [Fe/H] --- --- --- ---
ρ✶
(g/cm3)
11.30+0.29-0.32
 --- 10.63±0.74 7.20±0.63 9.73511850±0.34589380
10.5+1.4-2.2
 --- --- --- ---
M✶
(M⦿)
--- --- 0.386±0.008 0.386±0.008 0.362274±0.020491 0.40±0.02 --- --- --- ---
R✶
(R⦿)
0.380±0.008 0.380 0.380±0.008 0.378±0.011 0.3743580±0.0114957 0.38±0.02 --- 0.374357998371124±0.011495700000000 0.37435799837112427±0.01149570000000000 0.37435799837112427±0.01149570000000000
Sp. T
--- M3 V --- M --- M3.0 V --- --- --- ---
log g
(log10(cm/s2))
--- --- 4.872±0.026 4.872±0.026 4.8505300±0.0020899 --- --- 4.839820±0.382963 4.839820±0.382963 4.839820±0.382963
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
Atmospheric Spectroscopy
Source Kaye et al. 2022 Coulombe et al. 2025 Kokori et al. 2023 Van Eylen et al. 2021 Günther et al. 2019 ExoFOP
a/R✶
17.108+3.526-1.858
19.09+0.33-0.69
17.48+1.49-3.24
 ---
17.48+1.49-3.24
 ---
Teq
(K)
600±16
569+14-13
 --- 581±14
528+56-32
 943.9340039989486
b
0.48±0.46 0.20±0.13 --- 0.19±0.12 0.41±0.26 ---
e
0.0167+0.0084-0.0089
 --- --- 0.034±0.025 0 ---
i
(deg)
---
89.41+0.40-0.43
88.65+0.85-1.40
 89.39±0.37
88.65+0.85-1.40
 ---
P
(days)
3.35992±0.00005 --- 3.360156±0.000012 3.3601538±0.0000048
3.360080+0.000065-0.000070
 3.3601670547055087±0.0000035225465909
Rp
(R⨁)
1.28+0.05-0.04
 1.306±0.028 --- 1.206±0.039
1.247+0.089-0.083
 1.223466617017458±0.072212452135481
Rp
(RJup)
0.114+0.004-0.004
 0.1165±0.0025 --- 0.1076±0.0035
0.1112+0.0079-0.0074
 0.1091505686165967±0.0064423745627005
Rp/R✶
0.0307+0.0012-0.0009
 0.03144±0.00010 0.0300±0.0015 0.02920±0.00069
0.0300+0.0015-0.0011
 ---
a
(au)
---
0.03362+0.00099-0.00128
 --- 0.03197±0.00022
0.0306+0.0033-0.0057
 ---
δ
(%)
--- --- --- ---
0.0901+0.0092-0.0066
 0.0976694050059835±0.0052568770725906
T14
(hours)
1.294±0.026 --- --- ---
1.387+0.040-0.034
 1.3266673034451342±0.4358402686771111
TC
(days)
2458461.01464+0.00084-0.00093
(BJD)
2460222.240084±0.000035
(BJD)
2458891.1154±0.0013
(BJD-TDB)
2458387.09505±0.00074
(BJD-TDB)
2458461.01464+0.00084-0.00093
(BJD-TDB)
2460987.858405000±0.002242517
(BJD)
ω
(deg)
--- --- --- 0.00±103.00 --- ---
Mp
(M⨁)
1.48±0.18 1.48±0.18 --- 1.58±0.26 --- ---
Mp
(MJup)
0.00466±0.00057 0.00466±0.00057 --- 0.00497±0.00082 --- ---
ρ
(g/cm3)
3.89±0.66 3.7±0.5 --- 4.97±0.94 --- ---
K
(m/s)
--- --- --- 1.27±0.21 --- ---
S
(S⨁)
--- --- --- --- --- 131.79349226098907
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
Atmospheric Spectroscopy
Source Kaye et al. 2022 Kokori et al. 2023 Van Eylen et al. 2021 Günther et al. 2019 ExoFOP
a/R✶
25.569±0.306
27.01+0.60-1.58
 ---
27.01+0.60-1.58
 ---
Teq
(K)
489±11 --- 488±12
424+20-19
 452.870922604814
b
0.35±0.06 --- 0.28±0.11
0.22+0.17-0.14
 ---
e
0.0044+0.0005-0.0006
 --- 0.027±0.021 0 ---
i
(deg)
---
89.53+0.30-0.42
 89.36±0.24
89.53+0.30-0.42
 ---
P
(days)
5.66051±0.00004 5.6605746±0.0000046 5.6605731±0.0000031 5.660172±0.000035 5.66056931603069±0.00000385838100
Rp
(R⨁)
2.33±0.01 --- 2.355±0.064 2.42±0.13 2.40708723087558±0.11973171000000
Rp
(RJup)
0.208±0.001 --- 0.2101±0.0057 0.216±0.012 0.214746308812502±0.010681766094931
Rp/R✶
0.0560±0.0017 0.05825±0.00079 0.05701±0.00071
0.05825+0.00079-0.00058
 ---
a
(au)
--- --- 0.04526±0.00031
0.0472+0.0030-0.0033
 ---
δ
(%)
--- --- ---
0.3394+0.0094-0.0068
 0.385610608521182±0.006609782000000
T14
(hours)
1.682±0.019 --- ---
1.658+0.015-0.012
 1.66317040312773±0.05289611600000
TC
(days)
2458463.08056±0.00040
(BJD)
2458734.79487±0.00029
(BJD-TDB)
2458389.50285±0.00029
(BJD-TDB)
2458463.08481±0.00025
(BJD-TDB)
2459198.9614540±0.0005277
(BJD)
ω
(deg)
--- --- 10±90 --- ---
Mp
(M⨁)
6.20±0.31 --- 6.15±0.37 --- ---
Mp
(MJup)
0.0195±0.0010 --- 0.0194±0.0012 --- ---
ρ
(g/cm3)
2.70±0.14 --- 2.60±0.26 --- ---
K
(m/s)
--- --- 4.16±0.24 --- ---
S
(S⨁)
--- --- --- --- 9.94074078795448
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
Atmospheric Spectroscopy
Source Kaye et al. 2022 Kokori et al. 2023 Mikal-Evans et al. 2023 Van Eylen et al. 2021 Günther et al. 2019 ExoFOP
a/R✶
41.744±0.527
41.56+0.70-0.83
41.80+0.61-0.59
 ---
41.56+0.70-0.83
 ---
Teq
(K)
383±9 --- --- 387±10 340±14 485.37101855673984
b
0.23±0.08 ---
0.233+0.089-0.085
 0.19±0.11
0.224+0.083-0.110
 ---
e
0.0066±0.0020 --- 0 0.032±0.023 0 ---
i
(deg)
---
89.69+0.16-0.12
 89.68±0.12 89.73±0.16
89.69+0.16-0.12
 ---
P
(days)
11.38194±0.00011 11.379568±0.000012 11.38014 11.379573±0.000013
11.38014+0.00011-0.00010
 11.379699121657531±0.000007297717774
Rp
(R⨁)
2.00±0.05 --- 2.19±0.07 2.133±0.058 2.13±0.12 2.0234009062750817±0.0786569633019303
Rp
(RJup)
0.178±0.004 --- 0.195±0.006 0.1903±0.0052 0.190±0.011 0.18051604873180679±0.00701731632939026
Rp/R✶
0.0491±0.0016 0.05143±0.00074
0.05278+0.00095-0.00118
 0.05163±0.00069 0.05143±0.00074 ---
a
(au)
--- --- --- 0.07210±0.00050 0.0733±0.0042 ---
δ
(%)
--- ---
0.2786+0.0101-0.0124
 --- 0.2645±0.0078 0.296095494818468±0.007892959569814
T14
(hours)
2.117±0.018 --- --- --- 2.148±0.018 2.0489434475769053±0.1264447969347552
TC
(days)
2458469.33823±0.00032
(BJD)
2458776.58464±0.00037
(BJD-TDB)
2459129.34868+0.00691-0.00544
(JD-UTC)
2458389.68186±0.00059
(BJD-TDB)
2458469.33834+0.00052-0.00046
(BJD-TDB)
2460984.2470910000±0.0014269243
(BJD)
ω
(deg)
--- --- --- -6.0±90.0 --- ---
Mp
(M⨁)
4.20±0.16 --- --- 4.78±0.43 --- ---
Mp
(MJup)
0.0132±0.0005 --- --- 0.0150±0.0014 --- ---
ρ
(g/cm3)
2.90±0.24 --- --- 2.72±0.33 --- ---
K
(m/s)
--- --- --- 2.56±0.23 --- ---
S
(S⨁)
--- --- --- --- --- 9.213461075387041
Print
Known Objects
3 Confirmed Planets
1 2MASS Point Source Catalog
Data Files
4 KELT Time Series
3 Associated Literature Data
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