K2-222 Overview
K2-222
1.09
R⦿
6058.00
K
K2-222 b
0.210
RJup
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| K2-222 | K2-222 b | 15.39 d | 2.35 R⨁ | Transit | 2018 | Mayo et al. 2018 | Confirmed Planet |
- RA
- 01h05m51.00s
- Dec
- +11d45m13.38s
- Distance
-
101.321+0.632-0.625pc
- Parallax
- 9.8412700±0.0607778 mas
- Ecliptic Latitude
- 4.38938 deg
- Ecliptic Longitude
- 19.66406 deg
- Galactic Latitude
- -50.96109 deg
- Galactic Longitude
- 128.53772 deg
- Total Proper Motion
- 86.9642815±0.1057362 mas/yr
- Proper Motion (RA)
- 55.296400±0.106623 mas/yr
- Proper Motion (Dec)
- 67.12000±0.10513 mas/yr
- Photometry
-
mV9.543±0.004
-
mTESS8.97055±0.00620
-
mJ8.423±0.023
-
mH8.169±0.034
-
mKs8.105±0.017
-
mKep9.443
-
mW18.052±0.023
-
mW28.096±0.020
-
mW38.069±0.022
-
mW47.920±0.183
-
mGaia9.360720±0.000292
-
mB10.038±0.057
-
Abundances
(Hypatia Catalog) -
[Fe/H] -0.31±0.04 dex
-
[C/H] -0.19±0.09 dex
-
[O/H] -0.32±0.09 dex
-
[Na/H] -0.38±0.04 dex
-
[Mg/H] -0.27±0.07 dex
-
[Al/H] -0.41±0.06 dex
-
[Si/H] -0.27±0.05 dex
-
[Ca/H] -0.26±0.06 dex
-
[Y/H] -0.32±0.08 dex
-
Mission
- K2 : Observed in Campaign 8
| Source | Howard et al. 2025 | Bonomo et al. 2023 | Nava et al. 2022 | TICv8 | Livingston et al. 2018 | Gaia DR2 | Mayo et al. 2018 | Petigura et al. 2018 | ExoFOP | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
5961.0±100.0 | 5942±119 | 5942±119 |
6101.000+123.515-132.278
|
6058±89 |
5902.7+45.6-31.7
|
5934.0±50.0 | --- | 6101.000±127.896 | ||
|
Metallicity
(dex)
|
-0.250±0.044 [Fe/H] | -0.315±0.060 [Fe/H] | -0.315±0.060 [Fe/H] | --- | -0.21±0.06 [Fe/H] | --- | -0.3±0.08 [Fe/H] | --- | --- | ||
|
ρ✶
(g/cm3)
|
--- | --- |
1.1+0.1-0.1
|
1.3489190+0.3046987-0.3047227
|
1.250+0.694-0.498
|
--- | --- | --- | --- | ||
|
M✶
(M⦿)
|
0.92±0.04 |
0.9890+0.0700-0.0650
|
0.94±0.05 |
1.147000+0.145822-0.167428
|
1.00±0.04 | --- |
0.950497 +0.039773-0.035511
|
--- | --- | ||
|
R✶
(R⦿)
|
1.093±0.038 | 1.115±0.029 | 1.072±0.043 |
1.0623000+0.0466045-0.0531945
|
1.09±0.02 |
1.1215291+0.0121440-0.0171294
|
1.040375 +0.126390-0.095784
|
0.96 | 1.06229996681213±0.04989950000000 | ||
|
log g
(log10(cm/s2))
|
4.33±0.08 | --- | 4.35±0.02 |
4.4451400+0.0881016-0.0768092
|
4.37±0.03 | --- | 4.29±0.1 | --- | 4.4451400±0.0824554 | ||
|
L✶
(log10(L⦿))
|
--- | --- |
0.127+0.013-0.013
|
0.14879416+0.01772195-0.01410226
|
--- |
0.13851865+0.00350561-0.00353413
|
--- | --- | --- | ||
|
γ
(km/s)
|
--- | --- | --- | --- | --- | 1.4840781596733663±0.6312995907373408 | --- | --- | --- | ||
|
Age
(Gyr)
|
--- |
7.1+1.5-1.7
|
7.1+1.5-1.7
|
--- | --- | --- | --- | --- | --- | ||
|
v sin i
(km/s)
|
1.6±1.0 | --- | 3.1±0.5 | --- | --- | --- | --- | --- | --- | ||
|
S Index
|
0.1407 | --- | --- | --- | --- | --- | --- | --- | --- | ||
|
CAII LOG RHK
|
-5.128 | --- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
| Source | Bonomo et al. 2023 | Howard et al. 2025 | Nava et al. 2022 | Livingston et al. 2018 | Mayo et al. 2018 | Petigura et al. 2018 | ExoFOP | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|
|
b
|
--- | --- |
0.31+0.19-0.20
|
0.41+0.33-0.28
|
--- |
0.47 +0.30-0.32
|
--- | ||
|
P
(days)
|
15.38857±0.00088 | 15.3863±0.0014 | 15.38857±0.00088 |
15.387063+0.001815-0.001876
|
15.388825 +0.000993-0.000963
|
15.386796 +0.001829-0.001912
|
15.3886606556006±0.0001562771500 | ||
|
Rp
(R⨁)
|
2.350+0.080-0.070
|
2.41+0.17-0.08
|
2.35+0.08-0.07
|
2.39±0.13 |
2.22325950553 +0.33530681516-0.221397481924
|
2.1 +0.3-0.2
|
2.53826376884531±0.23958570000000 | ||
|
Rp
(RJup)
|
0.2097+0.0071-0.0062
|
0.215+0.015-0.007
|
0.210+0.007-0.006
|
0.213±0.012 |
0.1983459279 +0.0299140704-0.0197517604
|
0.19 +0.03-0.02
|
0.226449115827750±0.021374441299555 | ||
|
Rp/R✶
|
--- | --- |
0.01928+0.00040-0.00035
|
0.0201+0.0013-0.0008
|
0.019592 +0.001751-0.000744
|
0.0202 +0.0022-0.0010
|
--- | ||
|
T14
(hours)
|
--- | --- |
4.406+0.067-0.060
|
--- | --- |
4.38960+0.17040-0.16080
|
4.33006432752769±0.44330654000000 | ||
|
TC
(days)
|
2457399.0595±0.0016
(BJD-TDB)
|
2457399.0652±0.0042
(BJD)
|
2457399.0595±0.0016
(BJD)
|
2457399.06512+0.00465-0.00434
(BJD)
|
2457399.05993 +0.002105-0.002182
|
2457399.06596 +0.004595-0.004334
(BJD)
|
2459461.18112300±0.00519471
(BJD)
|
||
|
a/R✶
|
--- | --- | --- |
25.07+2.40-6.50
|
23.382130 +3.166908-7.660524
|
--- | --- | ||
|
Teq
(K)
|
871±23 | 801.0±20.0 |
878+17-15
|
801±14 | --- | --- | 779.17124374885 | ||
|
a
(au)
|
0.1206±0.0029 | --- | --- |
0.1211+0.0016-0.0017
|
--- | --- | --- | ||
|
S
(S⨁)
|
96.00+11.00-9.70
|
98.0±10.0 | 95±5 | --- | --- | --- | 87.1069215844062 | ||
|
Mp
(M⨁)
|
8.70±1.70 | 5.7±2.6 | 8.0±1.8 | --- | --- | --- | --- | ||
|
Mp
(MJup)
|
0.0274±0.0053 | 0.018±0.008 | 0.025±0.006 | --- | --- | --- | --- | ||
|
ρ
(g/cm3)
|
3.68+0.86-0.77
|
2.0±1.0 | 3.4±0.8 | --- | --- | --- | --- | ||
|
i
(deg)
|
89.12+0.55-0.41
|
--- |
89.12+0.55-0.41
|
--- |
88.790774 +0.892292-1.751858
|
--- | --- | ||
|
δ
(%)
|
--- | --- |
0.0372+0.0016-0.0013
|
--- | --- | --- | 0.0407105054467919±0.0041741627000000 | ||
|
e
|
<0.16 | --- | --- | --- | --- | --- | --- | ||
|
K
(m/s)
|
2.29±0.43 | --- | --- | --- | --- | --- | --- |
- Known Objects
- 1 Confirmed Planets
- 1 K2 Targets
- 1 2MASS Point Source Catalog
- Data Files
- 1 K2 Time Series
- 1 Associated Literature Data
-
Planet Masses, Radii, and Orbits from NASA's K2 Mission
Howard et al. 2025 | Reference Overview -
Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems
Bonomo et al. 2023 | Reference Overview -
K2-79b and K2-222b: Mass Measurements of Two Small Exoplanets with Periods beyond 10 days that Overlap with Periodic Magnetic Activity Signals
Nava et al. 2022 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Sixty Validated Planets from K2 Campaigns 5-8
Livingston et al. 2018 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
275 Candidates and 149 Validated Planets Orbiting Bright Stars in K2 Campaigns 0-10
Mayo et al. 2018 | Reference Overview -
Planet Candidates from K2 Campaigns 5─8 and Follow-up Optical Spectroscopy
Petigura et al. 2018 | Reference Overview -
ExoFOP TOI Table
ExoFOP -
The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
EPIC Catalog | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview
- System
- Star
- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
- External Link
- Search
- Browse
- Download
