TOI-238 Overview
TOI-238
0.77
R⦿
5029.00
K
TOI-238 b
0.139
RJup
TOI-238 c
0.194
RJup
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| TOI-238 | TOI-238 b | 1.27 d | 1.56 R⨁ | Transit | 2024 | Suárez Mascareño et al. 2024 | Confirmed Planet |
| TOI-238 | TOI-238 c | 8.47 d | 2.18 R⨁ | Radial Velocity | 2024 | Suárez Mascareño et al. 2024 | Confirmed Planet |
TOI-238 b
- Equilibrium temperature was calculated assuming a Bond albedo of 0.3. (Suárez Mascareño et al. 2024)
- Equilibrium temperature was calculated assuming a Bond albedo of 0.3. (Suárez Mascareño et al. 2024)
- RA
- 23h16m55.46s
- Dec
- -18d36m23.93s
- Distance
-
80.5407+0.2672-0.2655pc
- Parallax
- 12.3873000±0.0407538 mas
- Ecliptic Latitude
- -12.84423 deg
- Ecliptic Longitude
- 342.72973 deg
- Galactic Latitude
- -66.67115 deg
- Galactic Longitude
- 49.35353 deg
- Total Proper Motion
- 53.2380588±0.0769686 mas/yr
- Proper Motion (RA)
- -53.2377000±0.0769688 mas/yr
- Proper Motion (Dec)
- -0.1954510±0.0586055 mas/yr
- Photometry
-
mV10.748±0.013
-
mTESS9.926601±0.006000
-
mJ9.214±0.024
-
mH8.767±0.076
-
mKs8.598±0.021
-
mW18.550±0.022
-
mW28.612001±0.019000
-
mW38.559±0.030
-
mW48.356±0.386
-
mGaia10.488300±0.000367
-
mB11.667±0.174
| Source | Egger et al. 2025 | Suárez Mascareño et al. 2024 | Mistry et al. 2023 | TICv8 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
5059±89 | 5059±89 | 5080±130 |
5029.0000+160.0720-86.8867
|
5024±181 | ||
|
L✶
(log10(L⦿))
|
--- |
-0.4708+0.0123-0.0126
|
-0.4724+0.0263-0.0279
|
-0.4708892+0.0141303-0.0107048
|
--- | ||
|
ρ✶
(g/cm3)
|
--- | --- |
2.64+0.25-0.22
|
2.634571+0.636444-0.685374
|
--- | ||
|
M✶
(M⦿)
|
0.781+0.040-0.039
|
0.790±0.022 |
0.788+0.047-0.048
|
0.8400000+0.1197720-0.0787286
|
--- | ||
|
R✶
(R⦿)
|
0.756±0.007 | 0.733±0.015 |
0.750+0.025-0.026
|
0.7660280+0.0567276-0.0383678
|
0.77±0.05 | ||
|
log g
(log10(cm/s2))
|
4.58±0.05 | 4.577±0.021 | 4.584±0.029 |
4.593860+0.071685-0.106317
|
4.56850±0.30183 | ||
|
Metallicity
(dex)
|
-0.114±0.051 [Fe/H] | -0.114±0.051 [Fe/H] |
-0.050+0.230-0.260
[Fe/H]
|
--- | --- | ||
|
v sin i
(km/s)
|
2.3±0.3 | 1.84±0.45 | --- | --- | --- | ||
|
Age
(Gyr)
|
7.90+4.50-5.20
|
4.3±3.8 |
6.00+5.20-4.10
|
--- | --- | ||
|
CAII LOG RHK
|
--- | -4.74±0.27 | --- | --- | --- | ||
|
Sp. T
|
K2 V | K2V | --- | --- | --- | ||
|
Prot
(days)
|
--- | 26.0±1.3 | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
| Source | Egger et al. 2025 | Suárez Mascareño et al. 2024 | Mistry et al. 2023 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|
|
a/R✶
|
6.03±0.11 | --- |
6.14+0.58-1.04
|
--- | ||
|
Teq
(K)
|
1378±30 | 1311±28 | 1456.61±47.39 | 1412 | ||
|
b
|
0.23±0.12 | --- | 0.46±0.22 | --- | ||
|
S
(S⨁)
|
753.1±63.0 | 728±78 | 747.65±55.61 | 660.277 | ||
|
i
(deg)
|
--- | >84.6 |
85.78+2.21-3.42
|
--- | ||
|
P
(days)
|
1.2730990±0.0000016 | 1.2730991±0.0000029 | 1.273114±0.000002 | 1.2730965±0.0000027 | ||
|
Rp
(R⨁)
|
1.559±0.047 | 1.402±0.086 |
1.612+0.096-0.099
|
1.579250±0.123934 | ||
|
Rp
(RJup)
|
0.1391±0.0042 | 0.1251±0.0077 |
0.1438+0.0086-0.0088
|
0.1408915±0.0110567 | ||
|
Rp/R✶
|
0.01891±0.00055 | 0.01721±0.00083 | 0.020±0.001 | --- | ||
|
a
(au)
|
0.02120±0.00038 | 0.02118±0.00038 | 0.0212±0.0004 | --- | ||
|
δ
(%)
|
--- | --- | 0.039±0.004 | 0.04140000±0.00337341 | ||
|
T14
(hours)
|
1.587±0.047 | --- |
1.44+0.46-0.36
|
1.480±0.212 | ||
|
TC
(days)
|
2460205.7524±0.0011
(BJD)
|
2460207.0240±0.0033
(JD)
|
2458354.6608+0.0010-0.0008
(BJD)
|
2460205.7479920±0.0024743
(BJD)
|
||
|
Mp
(M⨁)
|
3.37±0.49 | 3.40±0.46 | --- | --- | ||
|
Mp
(MJup)
|
0.0106±0.0015 | 0.0107±0.0014 | --- | --- | ||
|
e
|
--- | <0.18 | --- | --- | ||
|
ρ
(g/cm3)
|
--- | 6.8±1.6 | --- | --- | ||
|
K
(m/s)
|
2.36±0.32 | 2.36±0.32 | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
- Tools
- Planetary Systems
- Transit
| Source | Suárez Mascareño et al. 2024 |
|---|---|
|
Teq
(K)
|
696±15 |
|
S
(S⨁)
|
58.3±6.2 |
|
Mp
(M⨁)
|
6.7±1.1 |
|
Mp
(MJup)
|
0.021±0.003 |
|
e
|
<0.36 |
|
i
(deg)
|
87.938±0.089 |
|
P
(days)
|
8.465651±0.000035 |
|
ρ
(g/cm3)
|
1.83±0.66 |
|
Rp
(R⨁)
|
2.18±0.18 |
|
Rp
(RJup)
|
0.194±0.016 |
|
Rp/R✶
|
0.0267±0.0021 |
|
K
(m/s)
|
2.46±0.41 |
|
a
(au)
|
0.0749±0.0013 |
|
TC
(days)
|
2460204.9675±0.0050
(BJD-TDB)
|
- Known Objects
- 2 Confirmed Planets
- 1 2MASS Point Source Catalog
- Data Files
- 4 KELT Time Series
- 2 Associated Literature Data
-
Searching for hot water world candidates with CHEOPS: Refining the radii and analysing the internal structures and atmospheric lifetimes of TOI-238 b and TOI-1685 b
Egger et al. 2025 | Reference Overview -
TESS and ESPRESSO discover a super-Earth and a mini-Neptune orbiting the K-dwarf TOI-238
Suárez Mascareño et al. 2024 | Reference Overview -
VaTEST III: Validation of 8 Potential Super-Earths from TESS Data
Mistry et al. 2023 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
ExoFOP-TESS TOI Table
ExoFOP-TESS TOI
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- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
- External Link
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