K2-229 Overview
K2-229
0.80
R⦿
5161.23
K
K2-229 b
0.089
RJup
K2-229 c
0.181
RJup
?
K2-229 d
0.236
RJup
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| K2-229 | K2-229 b | 0.58 d | 1 R⨁ | Transit | 2018 | Mayo et al. 2018 | Confirmed Planet |
| K2-229 | K2-229 c | 8.33 d | 2.03 R⨁ | Transit | 2018 | Mayo et al. 2018 | Confirmed Planet |
| K2-229 | K2-229 d | 31 d | 2.65 R⨁ | Transit | 2018 | Santerne et al. 2018 | Candidate Planet |
K2-229 b
- Transit depth value for EPIC 228801451.01 published in the wrong units. (Livingston et al. 2018)
- Transit depth value for EPIC 228801451.02 published in the wrong units. (Livingston et al. 2018)
- RA
- 12h27m29.50s
- Dec
- -06d43m18.65s
- Distance
-
102.564+1.093-1.070pc
- Parallax
- 9.722910±0.101996 mas
- Ecliptic Latitude
- -3.44652 deg
- Ecliptic Longitude
- 188.96395 deg
- Galactic Latitude
- 55.65723 deg
- Galactic Longitude
- 292.35223 deg
- Total Proper Motion
- 81.2268036±0.1307015 mas/yr
- Proper Motion (RA)
- -80.885900±0.130993 mas/yr
- Proper Motion (Dec)
- 7.4340300±0.0897302 mas/yr
- Photometry
-
mV10.985±0.017
-
mTESS10.2496±0.0064
-
mJ9.518±0.022
-
mH9.126±0.022
-
mKs9.050±0.023
-
mKep10.955
-
mW18.969±0.024
-
mW29.036±0.021
-
mW38.989±0.032
-
mW48.616±0.456
-
mGaia10.786100±0.001541
-
mB12.049±0.186
-
Mission
- K2 : Observed in Campaign 10
| Source | Howard et al. 2025 | Adams et al. 2021 | TICv8 | Dai et al. 2019 | Gaia DR2 | Livingston et al. 2018 | Santerne et al. 2018 | Mayo et al. 2018 | Luo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
5163.0±100.0 | 5315±35 |
5214.470+174.157-103.527
|
5185±32 |
5161.2334+109.7670-97.9834
|
5315+35-31
|
5185±32 | 5231.0±50.0 | --- |
|
L✶
(log10(L⦿))
|
--- | --- |
-0.3832967+0.0161351-0.0153933
|
--- |
-0.38868795+0.00546812-0.00553783
|
--- | --- | --- | --- |
|
R✶
(R⦿)
|
0.774±0.032 | 0.79±0.01 |
0.7881050+0.0462804-0.0581920
|
0.781±0.012 |
0.7994691+0.0312418-0.0329506
|
0.79±0.01 |
0.793+0.032-0.020
|
0.801878 +0.033511-0.023076
|
--- |
|
Sp. T
|
--- | --- | --- | --- | --- | --- | --- | --- | G9 |
|
Metallicity
(dex)
|
0.040±0.043 [Fe/H] | -0.090±0.020 [Fe/H] | 0.12±0.03 [M/H] | -0.06±0.02 [Fe/H] | --- | -0.090±0.020 [Fe/H] | -0.06±0.02 [Fe/H] | -0.03±0.08 [Fe/H] | --- |
|
v sin i
(km/s)
|
2.6±1.0 | --- | --- | --- | --- | 2.46±0.22 | 2.4±0.5 | --- | --- |
|
Age
(Gyr)
|
--- | --- | --- | --- | --- | --- |
5.40+5.20-3.70
|
--- | --- |
|
M✶
(M⦿)
|
0.84±0.03 | --- |
0.8880000+0.1296360-0.0897672
|
0.804+0.038-0.048
|
--- | 0.87±0.01 |
0.837+0.019-0.025
|
0.857910 +0.024711-0.028871
|
--- |
|
log g
(log10(cm/s2))
|
4.53±0.08 | 4.60±0.01 |
4.593310+0.084184-0.101483
|
4.56+0.03-0.05
|
--- |
4.59+0.00-0.01
|
4.56+0.03-0.05
|
4.59±0.1 | --- |
|
Prot
(days)
|
--- | --- | --- | --- | --- | --- | 18.1±0.3 | --- | --- |
|
ρ✶
(g/cm3)
|
--- | --- |
2.5575659+0.8706086-0.5007054
|
2.38+0.18-0.20
|
--- | --- | --- | --- | --- |
|
S Index
|
0.3516 | --- | --- | --- | --- | --- | --- | --- | --- |
|
CAII LOG RHK
|
-4.603 | --- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
| Source | Adams et al. 2021 | Howard et al. 2025 | Dai et al. 2019 | Livingston et al. 2018 | Mayo et al. 2018 | Santerne et al. 2018 |
|---|---|---|---|---|---|---|
|
a/R✶
|
4.2+0.3-0.2
|
--- | --- |
3.4+0.2-0.6
|
3.164016 +0.352525-0.797681
|
--- |
|
Teq
(K)
|
--- |
1763.0+52.0-51.0
|
--- |
1818+14-15
|
--- | 1960±40 |
|
b
|
--- | --- | --- |
0.38+0.28-0.26
|
--- | --- |
|
P
(days)
|
0.584216±0.000022 | 0.584272±0.000017 | 0.584 | 0.58426±0.00002 | 0.584240±0.000014 | 0.584249±0.000014 |
|
Rp
(R⨁)
|
1.00±0.02 |
1.260+0.082-0.034
|
1.197+0.045-0.048
|
1.14+0.06-0.03
|
1.25477589883 +0.138519038004-0.0731251467271
|
1.164+0.066-0.048
|
|
Rp
(RJup)
|
0.0892±0.0018 |
0.1124+0.0073-0.0030
|
0.1068+0.0040-0.0043
|
0.102+0.005-0.003
|
0.1119436077 +0.0123578408-0.0065237886
|
0.1038+0.0059-0.0043
|
|
Rp/R✶
|
0.01180+0.00023-0.00020
|
--- |
0.01403+0.00048-0.00052
|
0.0133+0.0007-0.0004
|
0.014346 +0.001466-0.000727
|
--- |
|
a
(au)
|
--- | --- | --- | 0.01310±0.00000 | --- | 0.012888±0.000130 |
|
δ
(%)
|
--- | --- | --- | 0.01625 | --- | --- |
|
T14
(hours)
|
--- | --- | --- | 1.5 | --- | --- |
|
TC
(days)
|
2457646.56655+0.00046-0.00077
(HJD)
|
2457605.08611±0.00078
(BJD)
|
--- |
2457583.4691±0.0012
(BJD)
|
2457582.88613 +0.001041-0.001057
|
--- |
|
i
(deg)
|
89.7±4.0 | --- | --- | --- |
81.593642 +5.952091-10.835042
|
83.9±2.8 |
|
S
(S⨁)
|
--- |
2290.0+280.0-260.0
|
--- | --- | --- | --- |
|
Mp
(M⨁)
|
--- | 2.55±0.38 |
2.49+0.42-0.43
|
--- | --- | 2.59±0.43 |
|
Mp
(MJup)
|
--- | 0.00802±0.00120 |
0.00783+0.00132-0.00135
|
--- | --- | 0.00815±0.00135 |
|
ρ
(g/cm3)
|
--- |
7.6+2.1-1.7
|
8.00+2.20-2.30
|
--- | --- | 8.9±2.1 |
|
e
|
--- | --- | --- | --- | --- | 0 |
|
K
(m/s)
|
--- | --- |
2.20+0.36-0.37
|
--- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
| Source | Livingston et al. 2018 | Howard et al. 2025 | Mayo et al. 2018 | Santerne et al. 2018 |
|---|---|---|---|---|
|
a/R✶
|
24.9+2.0-5.0
|
--- |
22.331079 +6.106412-11.064312
|
--- |
|
i
(deg)
|
--- | --- |
88.329466 +1.213090-3.065568
|
87.94±0.18 |
|
P
(days)
|
8.32727+0.00041-0.00043
|
8.3262±0.0015 |
8.328010 +0.000405-0.000391
|
8.32834±0.00045 |
|
Rp
(R⨁)
|
2.03+0.12-0.06
|
2.04+0.21-0.07
|
2.16480482242 +0.456991042682-0.178423508709
|
2.12+0.11-0.08
|
|
Rp
(RJup)
|
0.181+0.011-0.005
|
0.182+0.019-0.006
|
0.1931309503 +0.0407700101-0.0159178793
|
0.189+0.010-0.007
|
|
Rp/R✶
|
0.0236+0.0015-0.0007
|
--- |
0.024750 +0.005121-0.001912
|
--- |
|
TC
(days)
|
2457586.3431±0.0019
(BJD)
|
2457611.3227±0.0033
(BJD)
|
2457586.33508 +0.001674-0.001646
|
--- |
|
Teq
(K)
|
750±6 | 727.0±21.0 | --- | 800±20 |
|
b
|
0.39+0.29-0.27
|
--- | --- | --- |
|
a
(au)
|
0.0769±0.0003 | --- | --- | 0.07577±0.00076 |
|
δ
(%)
|
0.05325 | --- | --- | --- |
|
T14
(hours)
|
2.5 | --- | --- | --- |
|
Mp
(M⨁)
|
--- | 7.0±4.0 | --- | <21.3 |
|
Mp
(MJup)
|
--- | 0.022±0.013 | --- | <0.0670 |
|
e
|
--- | --- | --- | 0 |
|
ρ
(g/cm3)
|
--- |
5.1+3.5-2.9
|
--- | <12.8 |
|
S
(S⨁)
|
--- |
66.0+8.0-7.0
|
--- | --- |
- Status
- Candidate Planet
- Detected By
- Transit
| Source | Santerne et al. 2018 |
|---|---|
|
Teq
(K)
|
522±13 |
|
i
(deg)
|
88.92±0.24 |
|
P
(days)
|
31.0±1.1 |
|
Rp
(R⨁)
|
2.65±0.24 |
|
Rp
(RJup)
|
0.236±0.021 |
- Known Objects
- 2 Confirmed Planets
- 1 K2 Targets
- 1 2MASS Point Source Catalog
- Data Files
- 1 K2 Time Series
- 2 Associated Literature Data
-
Planet Masses, Radii, and Orbits from NASA's K2 Mission
Howard et al. 2025 | Reference Overview -
Ultra-short-period Planets in K2. III. Neighbors are Common with 13 New Multiplanet Systems and 10 Newly Validated Planets in Campaigns 0-8 and 10
Adams et al. 2021 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Homogeneous Analysis of Hot Earths: Masses, Sizes, and Compositions
Dai et al. 2019 | Reference Overview -
44 Validated Planets from K2 Campaign 10
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 -
An Earth-sized exoplanet with a Mercury-like composition
Santerne et al. 2018 | Reference Overview -
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 -
LAMOST DR4 catalogs
Luo et al. 2018 | 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
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