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K2-189 Overview

  • Star: K2-189
    • Stellar Radius: 0.88 Solar Radius
    • Stellar Effective Temperature: 5442.00 K
    • Planet: K2-189 b
      • Disposition Confirmed
      • Planet Radius 0.125 Jupiter Radius
    • Planet: K2-189 c
      • Disposition Confirmed
      • Planet Radius 0.206 Jupiter Radius

K2-189 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
K2-189
K2-189 b 2.59 d 1.4 R⨁ Transit 2018 Mayo et al. 2018 Confirmed Planet
K2-189 c 6.68 d 2.31 R⨁ Transit 2018 Mayo et al. 2018 Confirmed Planet
K2-189 K2-189 b K2-189 c
RA
13h34m29.15s
Dec
-15d02m11.46s
Distance
242.113+1.940-1.910
pc
Parallax
4.1017300±0.0325947 mas
Ecliptic Latitude
-4.82414 deg
Ecliptic Longitude
207.37463 deg
Galactic Latitude
46.56042 deg
Galactic Longitude
318.13687 deg
Total Proper Motion
60.2307097±0.0556926 mas/yr
Proper Motion (RA)
28.4205000±0.0666025 mas/yr
Proper Motion (Dec)
-53.1038000±0.0521489 mas/yr
Photometry
mV 12.398±0.033
mTESS 11.7537±0.0060
mJ 11.038±0.022
mH 10.701±0.025
mKs 10.589±0.021
mKep 12.206
mW1 10.550±0.023
mW2 10.606±0.021
mW3 10.558±0.075
mW4 9.344
mGaia 12.253800±0.000208
mB 13.016±0.470
Abundances
(Hypatia Catalog)
[Fe/H] -0.01±0.04 dex
[Mg/H] 0.10±0.07 dex
Mission
K2: Observed in Campaign 6
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 TICv8 Livingston et al. 2018 Gaia DR2 Mayo et al. 2018 Kruse et al. 2019 Kruse et al. 2019 Petigura et al. 2018 Pope et al. 2016 Barros et al. 2016
Teff
(K)
5442.0±100.0
5468.000+115.881-128.869
 5519±67
5357.5000+32.1665-105.0000
 5503.0±50.0 --- --- --- --- ---
Metallicity
(dex)
-0.100±0.047 [Fe/H] --- -0.0±0.1 [Fe/H] --- -0.01±0.08 [Fe/H] --- --- --- --- ---
v sin i
(km/s)
1.9±1.0 --- --- --- --- --- --- --- --- ---
M✶
(M⦿)
0.85±0.03
0.95600000+0.15122500-0.08823960
 0.94±0.03 ---
0.927528 +0.023874-0.027470
--- --- --- --- ---
R✶
(R⦿)
0.879±0.034
0.8664050+0.0609196-0.0289146
 0.87±0.01
0.8816883+0.0356030-0.0104927
0.862285 +0.037806-0.026861
0.882 +0.010-0.036
0.882 +0.010-0.036
0.88 --- ---
S Index
0.1663 --- --- --- --- --- --- --- --- ---
CAII LOG RHK
-4.999 --- --- --- --- --- --- --- --- ---
log g
(log10(cm/s2))
4.510±0.085
4.5430800+0.0770380-0.0817071
 4.53±0.02 --- 4.61±0.1 --- --- --- --- ---
L✶
(log10(L⦿))
---
-0.2185497+0.0141479-0.0146208
 ---
-0.23882641+0.00534749-0.00541415
 --- --- --- --- --- ---
γ
(km/s)
--- --- --- 15.957005802216978±1.278028820155934 --- --- --- --- --- ---
ρ✶
(g/cm3)
---
2.0723460+0.4338529-0.4744150
 --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Transit
Tools
Planetary Systems
Transit Prediction Service
K2 Names
K2 Planets and Candidates
Transit
Source Howard et al. 2025 Livingston et al. 2018 Mayo et al. 2018 Kruse et al. 2019
a/R✶
---
7.95+0.81-1.89
14.947174 +2.317404-4.976550
8.0 +2.6-1.1
Teq
(K)
1203.0+34.0-33.0
 1197±18 --- ---
b
---
0.41+0.32-0.29
 --- ---
P
(days)
2.58812±0.00011
2.588309+0.000221-0.000207
5.176300 +0.000407-0.000428
2.58819 +0.00014-0.00013
Rp
(R⨁)
1.403+0.079-0.043
 1.52±0.09
1.51234354251 +0.15220172371-0.0956746599487
1.587 +0.098-0.238
Rp
(RJup)
0.1252+0.0070-0.0038
 0.136±0.008
0.1349222538 +0.0135785283-0.0085355215
0.1416 +0.0087-0.0212
Rp/R✶
---
0.0159+0.0011-0.0007
0.016079 +0.001457-0.000885
0.01650 +0.00100-0.00239
a
(au)
--- 0.0361±0.0004 --- ---
TC
(days)
2457222.1466±0.0019
(BJD)
2457222.14350+0.00277-0.00280
(BJD)
2457253.20439 +0.001858-0.001749
2457219.5578 +0.0020-0.0021
(BJD)
i
(deg)
--- ---
88.113365 +1.351186-2.824007
---
S
(S⨁)
497.0+58.0-52.0
 --- --- ---
δ
(%)
--- --- ---
0.03 +0.0014-0.0015
T14
(hours)
--- --- ---
2.22000+0.09360-0.11280
Print
Status
Confirmed Planet
Detected By
Transit
Tools
Planetary Systems
Transit Prediction Service
K2 Names
K2 Planets and Candidates
Transit
Source Howard et al. 2025 Livingston et al. 2018 Mayo et al. 2018 Kruse et al. 2019 Petigura et al. 2018 Pope et al. 2016 Barros et al. 2016
Teq
(K)
877.0±24.0 872±13 --- --- --- --- ---
S
(S⨁)
140.0+16.0-15.0
 --- --- --- --- --- ---
P
(days)
6.67932±0.00021
6.679195+0.000383-0.000390
6.679340 +0.000245-0.000236
6.67913±0.00017
6.679224 +0.000371-0.000381
6.679 6.67773603
Rp
(R⨁)
2.31+0.14-0.05
 2.50±0.12
2.48429818 +0.31526235783-0.138100141989
2.58 +0.14-0.41
2.6 +0.3-0.2
--- ---
Rp
(RJup)
0.206+0.012-0.004
 0.223±0.011
0.2216342386 +0.0281258237-0.0123204694
0.230 +0.012-0.037
0.23 +0.03-0.02
--- ---
TC
(days)
2457223.4182±0.0013
(BJD)
2457223.41768+0.00243-0.00242
(BJD)
2457223.4181 +0.001444-0.001611
2457223.4198±0.0011
(BJD)
2457223.41757 +0.002322-0.002303
(BJD)
2457223.42
(BJD)
2457230.104786
(BJD)
a/R✶
---
18.17+1.37-3.63
17.032614 +2.861320-7.251072
17.0 +7.3-2.5
--- --- ---
Rp/R✶
---
0.0262+0.0014-0.0008
0.026413 +0.003145-0.001216
0.0268 +0.0015-0.0041
0.0271 +0.0022-0.0009
0.025593 ---
δ
(%)
--- --- --- 0.0784±0.0018 --- 0.0655 0.066±0.003
T14
(hours)
--- --- ---
2.70000+0.07440-0.15120
2.70960+0.08880-0.07920
 2.42712
2.98600+0.23500-0.23500
b
---
0.37+0.30-0.26
 --- ---
0.46 +0.30-0.31
0.123 ---
i
(deg)
--- ---
88.183460 +1.306319-3.348375
--- --- --- ---
a
(au)
--- 0.0680±0.0007 --- --- --- --- ---
Print
Known Objects
2 Confirmed Planets
1 K2 Targets
1 2MASS Point Source Catalog
Data Files
1 K2 Time Series
2 Associated Literature Data
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  • Candidate
  • False Positive Planet
  • Controversial
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