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K2-181 Overview

  • Star: K2-181
    • Stellar Radius: 1.04 Solar Radius
    • Stellar Effective Temperature: 5520.00 K
    • Planet: K2-181 b
      • Disposition Confirmed
      • Planet Radius 0.240 Jupiter Radius

K2-181 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
K2-181
K2-181 b 6.89 d 2.69 R⨁ Transit 2018 Mayo et al. 2018 Confirmed Planet
RA
08h30m12.99s
Dec
+10d54m36.52s
Distance
360.911+5.351-5.201
pc
Parallax
2.7424500±0.0401933 mas
Ecliptic Latitude
-7.81632 deg
Ecliptic Longitude
127.16069 deg
Galactic Latitude
26.83381 deg
Galactic Longitude
214.12703 deg
Total Proper Motion
37.3382669±0.0505675 mas/yr
Proper Motion (RA)
16.9173000±0.0683317 mas/yr
Proper Motion (Dec)
-33.2859000±0.0448496 mas/yr
Photometry
mV 12.669±0.103
mTESS 12.0873±0.0060
mJ 11.438±0.022
mH 11.082±0.021
mKs 11.026±0.021
mKep 12.637
mW1 10.999±0.023
mW2 11.062±0.023
mW3 11.041±0.205
mW4 8.319
mGaia 12.561800±0.000189
mB 13.502±0.025
mg 15.24400±0.01111
mi 12.4471000±0.0010501
mr 12.6189000±0.0013149
mu 15.2847000±0.0062841
mz 13.3819000±0.0062538
Abundances
(Hypatia Catalog)
[Fe/H] 0.27±0.04 dex
[Mg/H] 0.41±0.07 dex
Mission
K2: Observed in Campaigns 5, 18
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 Thygesen et al. 2023 TICv8 Livingston et al. 2018 Gaia DR2 Mayo et al. 2018 Kruse et al. 2019 Petigura et al. 2018 Barros et al. 2016 Pope et al. 2016
Teff
(K)
5528.0±100.0
5520.0+100.0-110.0
5573.000+152.818-94.267
 5608±91
5513.75+179.25-133.75
 5609.0±50.0 --- --- --- ---
L✶
(log10(L⦿))
---
-0.0443+0.0179-0.0177
-0.012522864+0.013548238-0.021803520
 ---
-0.02007917+0.00931148-0.00951550
 --- --- --- --- ---
Metallicity
(dex)
0.180±0.047 [Fe/H] 0.385±0.057 [Fe/H] --- 0.23±0.06 [Fe/H] --- 0.42±0.08 [Fe/H] --- --- --- ---
Age
(Gyr)
---
5.90+4.50-3.80
 --- --- --- --- --- --- --- ---
ρ✶
(g/cm3)
---
1.28+0.19-0.18
1.1724101+0.2809530-0.2230289
2.639+1.613-1.140
 --- --- --- --- --- ---
M✶
(M⦿)
0.96±0.04
1.022+0.060-0.058
0.9830000+0.1269060-0.1199420
 0.990±0.040 ---
1.043879 +0.023942-0.028795
--- --- --- ---
R✶
(R⦿)
1.060±0.042
1.040+0.043-0.039
1.0573400+0.0462206-0.0652869
 1.07±0.02
1.0708260+0.0539046-0.0663706
0.999244 +0.077057-0.041150
1.071 +0.066-0.054
1.11 --- ---
log g
(log10(cm/s2))
4.350±0.085
4.413+0.047-0.050
4.3821900+0.0775659-0.0775136
 4.38±0.03 --- 4.46±0.1 --- --- --- ---
v sin i
(km/s)
2.1±1.0 --- --- --- --- --- --- --- --- ---
S Index
0.183 --- --- --- --- --- --- --- --- ---
CAII LOG RHK
-4.914 --- --- --- --- --- --- --- --- ---
γ
(km/s)
--- --- --- --- -60.377086502347460±1.500900053185786 --- --- --- --- ---
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 Thygesen et al. 2023 Livingston et al. 2018 Mayo et al. 2018 Kruse et al. 2019 Petigura et al. 2018 Pope et al. 2016 Barros et al. 2016
b
---
0.48+0.25-0.33
0.43+0.32-0.29
 --- ---
0.49 +0.31-0.34
0 ---
P
(days)
6.89410±0.00043 6.893813±0.000011
6.894256+0.000704-0.000722
6.894252 +0.000430-0.000426
6.89442 +0.00025-0.00024
6.894287 +0.000757-0.000759
6.893 6.89424037
Rp
(R⨁)
2.69+0.21-0.09
2.84+0.21-0.16
 2.84±0.20
2.70624390594 +0.308465466239-0.183648017687
3.17 +0.28-0.51
2.8 +0.4-0.3
--- ---
Rp
(RJup)
0.240+0.019-0.008
0.253+0.019-0.014
 0.253±0.018
0.2414349100 +0.0275194456-0.0163839787
0.283 +0.025-0.045
0.25 +0.04-0.03
--- ---
Rp/R✶
---
0.02485+0.00160-0.00085
0.0244+0.0020-0.0012
0.024829 +0.002084-0.001339
0.0272 +0.0017-0.0041
0.0228 +0.0021-0.0013
0.024185 ---
T14
(hours)
---
2.5200+0.0672-0.0624
 --- ---
2.67120+0.08640-0.12480
2.44080+0.14880-0.16080
 2.46792 2.22400
TC
(days)
2457143.7948±0.0025
(BJD)
2457778.0262±0.0012
(BJD-TDB)
2457143.79263+0.00402-0.00423
(BJD)
2457143.79355 +0.002559-0.002528
2457143.7935 +0.0014-0.0015
(BJD)
2457143.79266 +0.004435-0.004802
(BJD)
2457143.799
(BJD)
2457143.794763
(BJD)
a/R✶
---
14.76+0.71-0.72
18.79+2.18-4.83
18.422692 +2.183026-4.814098
17.7 +5.5-2.5
--- --- ---
Teq
(K)
949.0±26.0 1015.0±13.0 962±20 --- --- --- --- ---
ω
(deg)
---
20.00+110.00-180.00
 --- --- --- --- --- ---
e
---
0.40+0.30-0.22
 --- --- --- --- --- ---
i
(deg)
---
87.40+1.50-0.71
 ---
88.615919 +0.983418-1.807891
--- --- --- ---
a
(au)
--- 0.0714±0.0014 0.0706±0.0010 --- --- --- --- ---
δ
(%)
---
0.0618+0.0083-0.0041
 --- ---
0.0828 +0.0027-0.0026
--- 0.0585 0.046±0.004
S
(S⨁)
192.0+22.0-21.0
 --- --- --- --- --- --- ---
Print
Known Objects
1 Confirmed Planets
2 K2 Targets
1 2MASS Point Source Catalog
Data Files
1 K2 Time Series
1 Associated Literature Data
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