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K2-389 Overview

K2-389 1.28 R⦿ 5422.20 K
K2-389 b
0.208 RJup
K2-389 c
0.182 RJup

K2-389 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
K2-389
K2-389 b 8.58 d 2.33 R⨁ Transit 2022 Christiansen et al. 2022 Confirmed Planet
K2-389 c 20.85 d 2.04 R⨁ Transit 2022 Christiansen et al. 2022 Confirmed Planet
RA
23h42m31.30s
Dec
-09d42m48.89s
Distance
259.208+2.950-2.885
pc
Parallax
3.8295900±0.0430933 mas
Ecliptic Latitude
-7.17662 deg
Ecliptic Longitude
352.11672 deg
Galactic Latitude
-66.17747 deg
Galactic Longitude
76.64503 deg
Total Proper Motion
76.0914368±0.0951461 mas/yr
Proper Motion (RA)
75.5418000±0.0955872 mas/yr
Proper Motion (Dec)
-9.129250±0.057382 mas/yr
Photometry
mV
11.827±0.046
mTESS
11.1312±0.0069
mJ
10.512±0.027
mH
10.233±0.022
mKs
10.184±0.024
mKep
11.636
mW1
10.118±0.021
mW2
10.165±0.019
mW3
10.282±0.082
mW4
8.758
mGaia
11.56970±0.00034
mB
12.231±0.402
mg
12.16650±0.00087
mi
11.4841000±0.0007157
mr
11.6409000±0.0008426
mu
14.5754000±0.0058921
mz
12.5192000±0.0045377
Mission
K2 : Observed in Campaign 12
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 Christiansen et al. 2022 TICv8 Zink et al. 2021
Teff
(K)
5773.0±100.0 5782±138
5422.200+141.774-102.265
 5782.0±138.0
L✶
(log10(L⦿))
--- ---
0.10644385+0.01340717-0.01677964
 ---
Metallicity
(dex)
0.038±0.060 [Fe/H] -0.0340±0.2350 [Fe/H] -0.22±0.09 [M/H] -0.0340±0.2350 [Fe/H]
ρ✶
(g/cm3)
--- ---
0.6305547+0.1634186-0.1288741
 ---
M✶
(M⦿)
0.990±0.050
0.8020+0.3570-0.2460
0.940000+0.126610-0.110840
0.8020+0.3570-0.2460
R✶
(R⦿)
1.094±0.041
1.084+0.067-0.061
1.2809200+0.0696553-0.0696111
1.0840+0.0670-0.0610
log g
(log10(cm/s2))
4.31±0.10 4.273±0.150
4.1961500+0.0868162-0.0755215
 4.2730±0.1500
Sp. T
--- --- --- G3
v sin i
(km/s)
1.8±1.0 --- --- ---
S Index
0.1432 --- --- ---
CAII LOG RHK
-5.119 --- --- ---
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 Christiansen et al. 2022 Zink et al. 2021
a/R✶
---
20.68+1.38-2.14
15.76+1.77-1.72
b
---
0.320+0.250-0.204
0.696+0.078-0.106
P
(days)
8.58289±0.00041
8.584043+0.000888-0.002026
8.583566+0.001096-0.001009
Rp
(R⨁)
2.33+0.12-0.06
2.184+0.118-0.114
2.118+0.158-0.146
Rp
(RJup)
0.208+0.011-0.005
0.1948+0.0105-0.0102
0.1890+0.0141-0.0130
Rp/R✶
---
0.0185+0.0010-0.0000
 0.0179±0.0010
T14
(hours)
--- --- 3.1
TC
(days)
2457742.782±0.002
(BJD)
2457742.7820+0.0007-0.0004
(JD)
2457742.784459+0.005075-0.004832
(BJD)
Teq
(K)
932.0±25.0 --- ---
S
(S⨁)
179.0+20.0-19.0
 --- ---
Print
Status
Confirmed Planet
Detected By
Transit
Tools
Planetary Systems
Transit Prediction Service
K2 Names
K2 Planets and Candidates
Transit
Source Christiansen et al. 2022 Zink et al. 2021
a/R✶
28.90+2.04-3.02
28.90+2.04-3.02
b
0.399+0.178-0.243
0.399+0.178-0.243
P
(days)
20.851337+0.002804-0.002981
20.851337+0.002804-0.002981
Rp
(R⨁)
2.040+0.151-0.138
2.040+0.151-0.138
Rp
(RJup)
0.1820+0.0135-0.0123
0.1820+0.0135-0.0123
Rp/R✶
0.0172±0.0010 0.0172±0.0010
T14
(hours)
--- 5.2
TC
(days)
2457747.1012+0.0050-0.0055
(JD)
2457747.101182+0.005040-0.005468
(BJD)
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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  • Kepler | K2
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