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TOI-270 Overview

  • Star: TOI-270
    • Stellar Radius: 0.37 Solar Radius
    • Stellar Effective Temperature: 3532.00 K
    • Planet: TOI-270 b
      • Disposition Confirmed
      • Planet Radius 0.114 Jupiter Radius
    • Planet: TOI-270 c
      • Disposition Confirmed
      • Planet Radius 0.208 Jupiter Radius
    • Planet: TOI-270 d
      • Disposition Confirmed
      • Planet Radius 0.178 Jupiter Radius

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 ---
mW2 ---
mW3 ---
mW4 ---
mGaia 11.630600±0.000476
mB 14.194±0.043
mg ---
mi ---
mr ---
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
Stellar Hosts
Source Weisserman et al. 2026 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
 --- --- --- ---
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⦿)
0.362±0.008 --- --- 0.386±0.008 0.386±0.008 0.362274±0.020491 0.40±0.02 --- --- --- ---
R✶
(R⦿)
0.374±0.011 0.380±0.008 0.380 0.380±0.008 0.378±0.011 0.3743580±0.0114957 0.38±0.02 --- 0.37435799837112427±0.01149570000000000 0.37435799837112427±0.01149570000000000 0.37435799837112427±0.01149570000000000
log g
(log10(cm/s2))
4.85±0.03 --- --- 4.872±0.026 4.872±0.026 4.8505300±0.0020899 --- --- 4.839820±0.382963 4.839820±0.382963 4.839820±0.382963
Metallicity
(dex)
-0.14±0.12 [Fe/H] --- --- --- -0.20±0.12 [Fe/H] --- -0.17±0.10 [Fe/H] --- --- --- ---
Sp. T
M3 V --- M3 V --- M --- M3.0 V --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
NExoList: JWST
Atmospheric Spectroscopy
Source Kaye et al. 2022 Weisserman et al. 2026 Coulombe et al. 2025 Kokori et al. 2023 Van Eylen et al. 2021 Günther et al. 2019 ExoFOP
Teq
(K)
600±16 585±15
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 ---
ω
(deg)
--- --- --- --- 0.00±103.00 --- ---
Mp
(M⨁)
1.48±0.18 1.49±0.25 1.48±0.18 --- 1.58±0.26 --- ---
Mp
(MJup)
0.00466±0.00057 0.00469±0.00079 0.00466±0.00057 --- 0.00497±0.00082 --- ---
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 3.36 --- 3.360156±0.000012 3.3601538±0.0000048
3.360080+0.000065-0.000070
 3.3601670547055087±0.0000035225465909
ρ
(g/cm3)
3.89±0.66 --- 3.7±0.5 --- 4.97±0.94 --- ---
Rp
(R⨁)
1.28+0.05-0.04
 1.28±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
 0.114±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
 ---
K
(m/s)
--- --- --- --- 1.27±0.21 --- ---
a
(au)
--- ---
0.03362+0.00099-0.00128
 --- 0.03197±0.00022
0.0306+0.0033-0.0057
 ---
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)
S
(S⨁)
--- --- --- --- --- --- 131.79349226098907
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
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
 ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
NExoList: JWST
Atmospheric Spectroscopy
Source Kaye et al. 2022 Kokori et al. 2023 Van Eylen et al. 2021 Günther et al. 2019 ExoFOP
Teq
(K)
489±11 --- 488±12
424+20-19
 729.6927145070847
b
0.35±0.06 --- 0.28±0.11
0.22+0.17-0.14
 ---
ω
(deg)
--- --- 10±90 --- ---
Mp
(M⨁)
6.20±0.31 --- 6.15±0.37 --- ---
Mp
(MJup)
0.0195±0.0010 --- 0.0194±0.0012 --- ---
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 5.6604773250877169±0.0000017056359401
ρ
(g/cm3)
2.70±0.14 --- 2.60±0.26 --- ---
Rp
(R⨁)
2.33±0.01 --- 2.355±0.064 2.42±0.13 2.3625955296403496±0.0826129403545672
Rp
(RJup)
0.208±0.001 --- 0.2101±0.0057 0.216±0.012 0.21077701825647266±0.00737024557055105
Rp/R✶
0.0560±0.0017 0.05825±0.00079 0.05701±0.00071
0.05825+0.00079-0.00058
 ---
K
(m/s)
--- --- 4.16±0.24 --- ---
a
(au)
--- --- 0.04526±0.00031
0.0472+0.0030-0.0033
 ---
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)
2460982.004741000±0.000611374
(BJD)
S
(S⨁)
--- --- --- --- 47.063853285426774
δ
(%)
--- --- ---
0.3394+0.0094-0.0068
 0.345184404189862±0.007284104907693
T14
(hours)
1.682±0.019 --- ---
1.658+0.015-0.012
 1.6617716161171816±0.2415571182018964
a/R✶
25.569±0.306
27.01+0.60-1.58
 ---
27.01+0.60-1.58
 ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit, Transit Timing Variations
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
NExoList: JWST
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
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
 ---
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 --- ---
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
ρ
(g/cm3)
2.90±0.24 --- --- 2.72±0.33 --- ---
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 ---
K
(m/s)
--- --- --- 2.56±0.23 --- ---
a
(au)
--- --- --- 0.07210±0.00050 0.0733±0.0042 ---
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)
S
(S⨁)
--- --- --- --- --- 9.213461075387041
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
a/R✶
41.744±0.527
41.56+0.70-0.83
41.80+0.61-0.59
 ---
41.56+0.70-0.83
 ---
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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