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K2-108 Overview

  • Star: K2-108
    • Stellar Radius: 2.31 Solar Radius
    • Stellar Effective Temperature: 5414.00 K
    • Planet: K2-108 b
      • Disposition Confirmed
      • Planet Radius 0.476 Jupiter Radius

K2-108 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
K2-108
K2-108 b 4.73 d 5.33 R⨁ Transit 2017 Petigura et al. 2017 Confirmed Planet
RA
08h13m31.64s
Dec
+16d25m10.26s
Distance
477.295+10.094-9.692
pc
Parallax
2.0669700±0.0430861 mas
Ecliptic Latitude
-3.39755 deg
Ecliptic Longitude
121.91423 deg
Galactic Latitude
25.35171 deg
Galactic Longitude
206.69134 deg
Total Proper Motion
23.7395700±0.0453408 mas/yr
Proper Motion (RA)
-6.874240±0.073306 mas/yr
Proper Motion (Dec)
-22.7225000±0.0418582 mas/yr
Photometry
mV 12.339±0.092
mTESS 11.6736±0.0060
mJ 10.986±0.021
mH 10.652±0.022
mKs 10.561±0.017
mKep 12.160
mW1 10.538±0.024
mW2 10.585±0.020
mW3 10.577±0.088
mW4 8.802
mGaia 12.170400±0.000201
mB 13.106±0.045
mg 15.7535000±0.0132907
mi 15.3456000±0.0138843
mr 15.5054000±0.0133354
mu 15.6082000±0.0095356
mz 14.0529000±0.0233282
Abundances
(Hypatia Catalog)
[Fe/H] 0.44±0.04 dex
[Mg/H] 0.54±0.07 dex
Mission
K2: Observed in Campaigns 5, 18
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
K2 Names
K2 Planets and Candidates
K2 Targets
Stellar Hosts
K2 Time Series
Source Howard et al. 2025 TICv8 Livingston et al. 2018 Gaia DR2 Mayo et al. 2018 Petigura et al. 2017 Kruse et al. 2019 Petigura et al. 2018 ExoFOP Barros et al. 2016 Pope et al. 2016
Teff
(K)
5474.0±60.0
5496.000+138.043-124.568
 5599±87
5384.5+84.5-98.5
 5414.0±53.0 5474±60 --- --- 5496.000±131.305 --- ---
Metallicity
(dex)
0.33±0.04 [Fe/H] --- 0.36±0.05 [Fe/H] --- 0.48±0.08 [Fe/H] 0.33±0.04 [Fe/H] --- --- --- --- ---
M✶
(M⦿)
2.83±1.00
0.9640000+0.1165790-0.1209720
 1.17±0.06 ---
1.288050 +0.111913-0.105338
1.121+0.065-0.053
 --- --- --- --- ---
R✶
(R⦿)
1.75±0.14
1.7589600+0.1072890-0.0975397
 1.76±0.04
1.7968997+0.0675912-0.0550978
2.306381 +0.380594-0.354232
1.75±0.14
1.797 +0.055-0.068
1.77 1.75896000862122±0.10241400000000 --- ---
log g
(log10(cm/s2))
3.99±0.05
3.9316300+0.0842693-0.0790174
 4.02±0.03 --- 3.75±0.1 3.99±0.05 --- --- 3.9316300±0.0816434 --- ---
ρ✶
(g/cm3)
---
0.2497324+0.0557402-0.0611323
0.8060+0.2350-0.1950
 --- --- --- --- --- --- --- ---
v sin i
(km/s)
2.83±1.00 --- --- --- --- <2 --- --- --- --- ---
Age
(Gyr)
--- --- --- --- --- 7.8±1.5 --- --- --- --- ---
L✶
(log10(L⦿))
---
0.4053940+0.0181861-0.0250518
 ---
0.38832391+0.01276264-0.01314908
 --- --- --- --- --- --- ---
S Index
0.1225 --- --- --- --- --- --- --- --- --- ---
CAII LOG RHK
-5.2928 --- --- --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Tools
Planetary Systems
Transit Prediction Service
TOI
K2 Names
K2 Planets and Candidates
Transit
Source Livingston et al. 2018 Howard et al. 2025 Mayo et al. 2018 Petigura et al. 2017 Kruse et al. 2019 Petigura et al. 2018 ExoFOP Barros et al. 2016 Pope et al. 2016
P
(days)
4.733999+0.000221-0.000227
 4.73401±0.00024
4.733790 +0.000153-0.000150
4.73401±0.00024 4.73363±0.00013
4.734006 +0.000228-0.000223
4.73355750514672±0.00004231500000 4.73360988 4.734
δ
(%)
--- --- --- ---
0.0973 +0.0017-0.0018
--- 0.0930250351853628±0.0124072470000000 0.083±0.002 0.0778
T14
(hours)
--- --- --- ---
3.62880+0.08400-0.11520
3.54960+0.06960-0.06000
 3.20892344814356±1.06387870000000
3.60500+0.19200-0.19200
 3.40704
TC
(days)
2457145.09609±0.00172
(BJD)
2457145.0965±0.0019
(BJD)
2457145.09736 +0.001258-0.001287
2457145.0965±0.0019
(BJD)
2457140.3649±0.0011
(BJD)
2457145.09672 +0.001725-0.001805
(BJD)
2459502.37596300±0.00295559
(BJD)
2457145.095098
(BJD)
2457140.365
(BJD)
a/R✶
9.86+0.54-1.44
 ---
8.598202 +1.663563-2.552240
---
8.9 +2.4-1.3
--- --- --- ---
Rp
(R⨁)
5.33±0.21 5.28±0.54
7.56448313175 +1.45698699527-1.21105373261
5.28±0.54
5.81 +0.36-0.71
5.3 +0.9-0.7
5.38526662909778±6.43875360000000 --- ---
Rp
(RJup)
0.476±0.019 0.471±0.048
0.6748579830 +0.1299836734-0.1080429773
0.471±0.048
0.518 +0.032-0.063
0.47 +0.08-0.06
0.480442135929254±0.574428110131370 --- ---
Rp/R✶
0.0277+0.0011-0.0006
 ---
0.030069 +0.002987-0.001359
---
0.0297 +0.0016-0.0035
0.0276 +0.0018-0.0007
--- --- 0.027891
Teq
(K)
1360±29 1446.0±48.0 --- 1446±48 --- --- 1377.32406161458 --- ---
S
(S⨁)
--- 762.0±100.0 --- 762±100 --- --- 850.482810166102 --- ---
Mp
(M⨁)
--- 59.4±4.4 --- 59.4±4.4 --- --- --- --- ---
Mp
(MJup)
--- 0.187±0.014 --- 0.187±0.014 --- --- --- --- ---
ρ
(g/cm3)
---
2.22+0.77-0.55
 ---
2.22+0.77-0.55
 --- --- --- --- ---
b
0.33+0.27-0.23
 --- --- --- ---
0.41 +0.30-0.28
--- --- 0.197
a
(au)
0.0581±0.0009 --- --- 0.0573±0.0010 --- --- --- --- ---
i
(deg)
--- ---
86.135130 +2.726937-3.999993
--- --- --- --- --- ---
e
--- --- --- 0.180±0.042 --- --- --- --- ---
K
(m/s)
--- --- --- 21.3±1.4 --- --- --- --- ---
Print
Known Objects
1 Confirmed Planets
2 K2 Targets
2 2MASS Point Source Catalog
Data Files
1 K2 Time Series
1 Associated Literature Data
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