K2-28 Overview
K2-28
0.28
R⦿
3292.75
K
K2-28 b
0.207
RJup
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| K2-28 | K2-28 b | 2.26 d | 2.32 R⨁ | Transit | 2016 | Hirano et al. 2016 | Confirmed Planet |
K2-28
- Equilibrium temperature was calculated assuming a Bond albedo of 0.15 +- 0.15. (Chen et al. 2018)
- Equilibrium temperature was calculated assuming a Bond albedo of 0.3. (Stefansson et al. 2018)
- RA
- 22h22m29.60s
- Dec
- -07d57m22.87s
- Distance
-
62.9969+0.3212-0.3181pc
- Parallax
- 15.8456000±0.0799362 mas
- Ecliptic Latitude
- 2.0401 deg
- Ecliptic Longitude
- 334.50552 deg
- Galactic Latitude
- -49.89439 deg
- Galactic Longitude
- 54.4554 deg
- Total Proper Motion
- 320.4672536±0.1267619 mas/yr
- Proper Motion (RA)
- -254.655000±0.136247 mas/yr
- Proper Motion (Dec)
- -194.551000±0.108602 mas/yr
- Photometry
-
mV16.526±1.133
-
mTESS13.3455000±0.0075941
-
mJ11.695±0.030
-
mH11.028±0.023
-
mKs10.746±0.023
-
mKep14.854
-
mW110.591±0.022
-
mW210.466±0.020
-
mW310.381±0.086
-
mW4>8.636
-
mGaia14.679900±0.000763
-
mB17.776±0.142
-
mg16.8387000±0.0041921
-
mi13.90860±0.00332
-
mr15.4489000±0.0035419
-
mu19.2974000±0.0295905
-
mz13.1031000±0.0032623
-
Mission
- K2 : Observed in Campaign 3
| Source | TICv8 | Stefansson et al. 2018 | Gaia DR2 | Chen et al. 2018 | Dressing et al. 2017 | Hirano et al. 2016 | Kruse et al. 2019 | ExoFOP | Vanderburg et al. 2016 | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
3236.0±157.0 | 3214±60 |
3940.2532+222.3590-477.2530
|
3290±90 |
3292.745361+88.653755-87.231682
|
3214±60 | --- | 3236±157 | 2997 | ||
|
M✶
(M⦿)
|
0.3238330±0.0203379 | 0.257±0.048 | --- | 0.201±0.096 |
0.201355+0.090102-0.102016
|
0.257±0.048 | --- | --- | --- | ||
|
R✶
(R⦿)
|
0.3410240±0.0103601 | 0.288±0.028 | --- | 0.280±0.031 |
0.279867+0.031264-0.031182
|
0.288±0.028 |
0.184 +0.040-0.087
|
0.3410240113735199±0.0103601000000000 | 0.18 | ||
|
Metallicity
(dex)
|
--- | 0.26±0.05 [Fe/H] | --- | 0.332±0.096 [Fe/H] | --- | 0.26±0.10 [Fe/H] | --- | --- | --- | ||
|
log g
(log10(cm/s2))
|
4.8828200±0.0009159 | 4.93±0.04 | --- | 4.93±0.24 | --- | 4.93±0.04 | --- | 4.88 | --- | ||
|
Sp. T
|
--- | --- | --- | M4 | --- | M4 | --- | --- | --- | ||
|
ρ✶
(g/cm3)
|
11.5114996±0.3253935 |
10.8+5.5-3.2
|
--- | --- | --- | 15.2±3.4 | --- | --- | --- | ||
|
L✶
(log10(L⦿))
|
-1.93970+0.09910-0.12862
|
--- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Transit
| Source | Hirano et al. 2016 | Stefansson et al. 2018 | Chen et al. 2018 | Dressing et al. 2017 | Kruse et al. 2019 | ExoFOP | Vanderburg et al. 2016 | Show Candidate Solutions >> | << Hide Candidate Solutions |
|---|---|---|---|---|---|---|---|---|---|
|
Teq
(K)
|
568±35 |
420.0+26.0-29.0
|
590±60 | --- | --- | 547.9231142839565 | --- | ||
|
S
(S⨁)
|
--- |
21.7+6.0-5.4
|
--- |
30.1+4.5-3.8
|
--- | 21.300975278359235 | --- | ||
|
P
(days)
|
2.260455±0.000041 | 2.2604455±0.0000009 | 2.2604380±0.0000015 |
2.260435+0.000027-0.000028
|
2.260404 +0.000016-0.000017
|
2.2604345821230276±0.0000095694790000 | 2.2604439 | ||
|
Rp
(R⨁)
|
2.32±0.24 |
2.56+0.27-0.26
|
2.45±0.28 |
2.30+0.28-0.26
|
1.52 +0.34-0.73
|
2.6794738931536406±1.9990408000000000 | 1.6 | ||
|
Rp
(RJup)
|
0.207±0.021 |
0.228+0.024-0.023
|
0.219±0.025 |
0.205+0.025-0.023
|
0.136 +0.030-0.065
|
0.23904706100115247±0.17834278187311001 | 0.143 | ||
|
δ
(%)
|
--- | 0.664±0.047 | --- | --- |
0.675 +0.017-0.016
|
0.608201996411874±0.067568100000000 | 0.642 | ||
|
T14
(hours)
|
--- |
0.982+0.038-0.036
|
--- | --- |
0.98400+0.03120-0.05280
|
0.9618922484299552±0.5426069000000000 | 0.99000 | ||
|
TC
(days)
|
2456977.99012+0.00075-0.00074
(BJD)
|
2457931.89779+0.00032-0.00031
(BJD-TDB)
|
2457796.26865+0.00049-0.00048
(BJD-TDB)
|
2456980.25±0.00
(BJD)
|
2456977.99055 +0.00028-0.00027
(BJD)
|
2459448.65206500±0.00105388
(BJD)
|
2456980.250
(BJD)
|
||
|
a/R✶
|
17.9+1.2-2.8
|
14.3+2.1-1.6
|
14.4+1.7-2.5
|
16.21+2.92-3.26
|
17.3 +3.7-1.7
|
--- | --- | ||
|
b
|
0.36+0.26-0.24
|
0.715+0.069-0.120
|
0.68+0.18-0.09
|
--- | --- | --- | 0.63 | ||
|
ω
(deg)
|
--- | 0±0 | --- |
42.8000000+92.9762050-151.9936200
|
--- | --- | --- | ||
|
e
|
0 | 0±0 | --- |
0.130000+0.230492-0.110089
|
--- | --- | --- | ||
|
i
(deg)
|
88.9+0.8-1.2
|
87.30+0.79-0.66
|
--- |
88.35+1.08-1.46
|
--- | --- | --- | ||
|
Rp/R✶
|
0.0737+0.0032-0.0018
|
0.0815+0.0028-0.0029
|
0.0802±0.0022 |
0.075253+0.003602-0.002098
|
0.0755 +0.0035-0.0070
|
--- | 0.07740 | ||
|
a
(au)
|
0.0214±0.0013 |
0.0192+0.0034-0.0028
|
0.0187+0.0030-0.0039
|
0.020+0.003-0.004
|
--- | --- | --- |
- Known Objects
- 1 Confirmed Planets
- 1 K2 Targets
- 1 2MASS Point Source Catalog
- Data Files
- 1 K2 Time Series
- 1 Associated Literature Data
-
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Detection of Hundreds of New Planet Candidates and Eclipsing Binaries in K2 Campaigns 0-8
Kruse et al. 2019 | Reference Overview -
Diffuser-assisted Photometric Follow-up Observations of the Neptune-sized Planets K2-28b and K2-100b
Stefansson et al. 2018 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
An Improved Transit Measurement for a 2.4 R⊕ Planet Orbiting A Bright Mid-M Dwarf K2-28
Chen et al. 2018 | Reference Overview -
Characterizing K2 Candidate Planetary Systems Orbiting Low-mass Stars. II. Planetary Systems Observed During Campaigns 1-7
Dressing et al. 2017 | 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 -
The K2-ESPRINT Project III: A Close-in Super-Earth around a Metal-rich Mid-M Dwarf
Hirano et al. 2016 | Reference Overview -
Planetary Candidates from the First Year of the K2 Mission
Vanderburg et al. 2016 | 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
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