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K2-38 Overview

K2-38 1.12 R⦿ 5758.00 K
K2-38 b
0.137 RJup
K2-38 c
0.204 RJup

K2-38 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
K2-38
K2-38 b 4.02 d 1.54 R⨁ Transit 2016 Sinukoff et al. 2016 Confirmed Planet
K2-38 c 10.56 d 2.29 R⨁ Transit 2016 Sinukoff et al. 2016 Confirmed Planet
RA
16h00m07.99s
Dec
-23d11m21.91s
Distance
192.690+2.669-2.597
pc
Parallax
5.1624800±0.0703693 mas
Ecliptic Latitude
-2.55161 deg
Ecliptic Longitude
242.63504 deg
Galactic Latitude
22.1208 deg
Galactic Longitude
349.62852 deg
Total Proper Motion
68.2729691±0.1056866 mas/yr
Proper Motion (RA)
-56.969400±0.121336 mas/yr
Proper Motion (Dec)
-37.625600±0.054998 mas/yr
Photometry
mV
11.344±0.023
mTESS
10.6554±0.0061
mJ
9.911±0.024
mH
9.600±0.026
mKs
9.470±0.021
mKep
11.210
mW1
9.420±0.023
mW2
9.466±0.021
mW3
9.364±0.041
mW4
8.528
mGaia
11.184000±0.001015
mB
12.344±0.269
Abundances
(Hypatia Catalog)
[Fe/H] 0.30±0.07 dex
[C/H] 0.20±0.09 dex
[O/H] 0.15±0.09 dex
[Na/H] 0.23±0.04 dex
[Mg/H] 0.35±0.12 dex
[Al/H] 0.17±0.06 dex
[Si/H] 0.21±0.05 dex
[Ca/H] 0.20±0.06 dex
[Y/H] 0.17±0.08 dex
Mission
K2 : Observed in Campaigns 2, 15
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
K2 Names
K2 Planets and Candidates
K2 Targets
Stellar Hosts
K2 Time Series
Source Howard et al. 2025 Bonomo et al. 2023 Toledo-Padrón et al. 2020 TICv8 Gaia DR2 Stassun et al. 2017 Crossfield et al. 2016 Sinukoff et al. 2016 Kruse et al. 2019
Teff
(K)
5679.0±100.0 5705±66 5731±66
5679.0000+99.8187-99.6625
5182.700+80.775-120.700
 5757±60 5758±92 5757±60 ---
M✶
(M⦿)
1.04±0.05
1.054+0.070-0.063
1.03+0.04-0.02
1.010000+0.132116-0.112107
 --- 2.24±1.67 1.080±0.040 1.07±0.05 ---
R✶
(R⦿)
0.924±0.036 1.141±0.012
1.06+0.09-0.06
1.1636800+0.0526457-0.0578417
1.2409927+0.0598869-0.0377970
 1.38±0.21 1.12±0.10 1.10±0.09
1.241 +0.038-0.060
log g
(log10(cm/s2))
4.320±0.083 --- 4.38±0.11
4.3107200+0.0721750-0.0699974
 --- 4.35±0.08 4.364±0.074 4.35±0.08 ---
Metallicity
(dex)
0.230±0.046 [Fe/H] 0.235±0.070 [Fe/H] 0.26±0.05 [Fe/H] 0.23±0.10 [M/H] --- 0.28 [Fe/H] --- 0.28±0.04 [Fe/H] ---
ρ✶
(g/cm3)
--- --- ---
0.90361970+0.18718550-0.16586750
 --- 1.21±0.70 --- --- ---
L✶
(log10(L⦿))
--- ---
0.0374+0.0560-0.0643
0.10344999+0.02401137-0.02462062
0.00045750532+0.00747964862-0.00761063959
 --- --- --- ---
γ
(km/s)
--- --- --- --- -35.33348571344460±0.60885349794287 --- --- --- ---
v sin i
(km/s)
1.5±1.0 --- <2 --- --- --- --- <2 ---
Sp. T
--- --- G2 V --- --- --- --- G2 V ---
Age
(Gyr)
---
6.1+3.4-3.1
6.7+2.4-3.0
 --- --- --- --- --- ---
CAII LOG RHK
-5.12 --- -5.06±0.13 --- --- --- --- --- ---
S Index
0.1435 --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Tools
Planetary Systems
Transit Prediction Service
K2 Names
K2 Planets and Candidates
Transit
Source Toledo-Padrón et al. 2020 Howard et al. 2025 Bonomo et al. 2023 Stassun et al. 2017 Crossfield et al. 2016 Sinukoff et al. 2016 Kruse et al. 2019
a/R✶
10.13+0.75-0.66
 --- --- 10.10±1.96 ---
10.10+1.35-2.57
8.7 +3.4-1.1
Teq
(K)
1266+44-50
1189.0+67.0-69.0
 1310±22 --- --- 1184±51 ---
b
--- --- --- --- --- 0.48±0.30 ---
S
(S⨁)
426+67-60
 500.0±100.0 490±35 --- 480±92 465.9±80.1 ---
Mp
(M⨁)
7.3+1.1-1.0
 6.0±2.0
7.7+1.2-1.1
 19±10 --- 12.0±2.9 ---
Mp
(MJup)
0.023+0.003-0.003
 0.019±0.006
0.024+0.004-0.003
 0.06±0.03 --- 0.0378±0.0091 ---
i
(deg)
88.36+0.17-0.15
 ---
88.36+0.17-0.15
 87.28±2.48 ---
87.28+1.88-3.08
 ---
P
(days)
4.01593±0.00050 4.01668±0.00032 4.01593±0.00050 4.01593±0.00050 4.01628±0.00044 4.01593±0.00050 4.01663±0.00023
ρ
(g/cm3)
11.0+4.1-2.8
6.50+3.70-2.50
9.30+2.40-1.90
 --- ---
17.5+8.5-6.2
 ---
Rp
(R⨁)
1.54±0.14
1.55+0.11-0.05
 1.655±0.096 1.9±0.3 1.64±0.19 1.55±0.16
1.96 +0.19-0.62
Rp
(RJup)
0.137±0.012
0.138+0.010-0.004
 0.1476±0.0086 0.17±0.03 0.146±0.017 0.138±0.014
0.175 +0.017-0.055
Rp/R✶
0.01330+0.00071-0.00076
 --- --- --- 0.01329±0.00099
0.01281+0.00105-0.00064
0.0145 +0.0013-0.0045
K
(m/s)
2.95+0.44-0.39
 --- 3.02±0.43 4.6±1.1 --- 4.6±1.1 ---
a
(au)
0.04994+0.00048-0.00049
 --- 0.0503±0.0011 --- 0.05073±0.00063 0.0506±0.0008 ---
T14
(hours)
--- --- --- --- 2.74±0.13 2.861±0.220
3.19200+0.14400-0.24000
TC
(days)
2456896.8786±0.0054
(BJD)
2456896.8707±0.0035
(BJD)
2456896.8786±0.0054
(BJD-TDB)
--- 2456896.8753±0.0049
(BJD-TDB)
2456896.8786±0.0054
(BJD-TDB)
2456896.8693±0.0024
(BJD)
e
0.197+0.067-0.060
 --- <0.11 --- --- --- ---
δ
(%)
--- --- --- 0.0160±0.0022 --- ---
0.02607 +0.00095-0.00094
ω
(deg)
16+25-33
 --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Tools
Planetary Systems
Transit Prediction Service
K2 Names
K2 Planets and Candidates
Transit
Source Toledo-Padrón et al. 2020 Howard et al. 2025 Bonomo et al. 2023 Crossfield et al. 2016 Sinukoff et al. 2016 Kruse et al. 2019
Teq
(K)
916+32-37
862.0+48.0-50.0
 949±16 --- 858±37 ---
S
(S⨁)
117+18-16
131.0+32.0-28.0
 135.3±9.5 132±25 128.3±22.1 ---
Mp
(M⨁)
8.3±1.3 7.70±2.70
7.4+1.4-1.3
 --- 9.90±4.60 ---
Mp
(MJup)
0.026±0.004 0.0242±0.0085
0.023+0.004-0.004
 --- 0.0311±0.0145 ---
e
0.161+0.096-0.078
 --- <0.086 --- --- ---
i
(deg)
87.68+0.31-0.28
 ---
87.68+0.31-0.28
 ---
88.61+1.00-1.67
 ---
P
(days)
10.56103±0.00090 10.56104±0.00059 10.56103±0.00090 10.56098±0.00081 10.56103±0.00090 10.56131±0.00053
ρ
(g/cm3)
3.8+1.8-1.1
2.7+1.6-1.1
2.63+1.00-0.72
 ---
3.6+2.7-1.9
 ---
Rp
(R⨁)
2.29±0.26
2.18+0.15-0.06
 2.49±0.22 2.41±0.27 2.42±0.29
2.83 +0.26-0.76
Rp
(RJup)
0.204±0.023
0.194+0.013-0.005
 0.222±0.020 0.215±0.024 0.216±0.026
0.252 +0.023-0.068
K
(m/s)
2.41+0.39-0.37
 --- 2.11±0.37 --- 2.8±1.3 ---
a
(au)
0.09514+0.00091-0.00094
 --- 0.0959±0.0022 0.0967±0.0012 0.0964±0.0016 ---
TC
(days)
2456900.4752±0.0033
(BJD)
2456900.4751±0.0021
(BJD)
2456900.4752±0.0033
(BJD-TDB)
2456900.4746±0.0028
(BJD-TDB)
2456900.4752±0.0033
(BJD-TDB)
2456900.4756±0.0021
(BJD)
a/R✶
19.30+1.43-1.26
 --- --- ---
26.20+6.90-9.99
26.4 +11.7-4.7
b
--- --- --- ---
0.640+0.230-0.410
 ---
Rp/R✶
0.0200+0.0017-0.0018
 --- --- 0.0195±0.0014
0.02004+0.00236-0.00135
0.0209 +0.0018-0.0055
T14
(hours)
--- --- --- 2.38±0.10
2.533+0.312-0.144
2.64000+0.12000-0.26400
δ
(%)
--- --- --- --- --- 0.0484±0.0023
ω
(deg)
153+54-33
 --- --- --- --- ---
Print
Known Objects
2 Confirmed Planets
2 K2 Targets
2 2MASS Point Source Catalog
Data Files
4 KELT Time Series
1 SuperWASP Time Series
2 K2 Time Series
2 Associated Literature Data
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