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K2-28 Overview

  • Star: K2-28
    • Stellar Radius: 0.28 Solar Radius
    • Stellar Effective Temperature: 3292.75 K
    • Planet: K2-28 b
      • Disposition Confirmed
      • Planet Radius 0.207 Jupiter Radius

K2-28 Architecture & Discovery Information

Name 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)
K2-28 b
RA
22h22m29.60s
Dec
-07d57m22.87s
Distance
62.9969+0.3212-0.3181
pc
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
mV 16.526±1.133
mTESS 13.3455000±0.0075941
mJ 11.695±0.030
mH 11.028±0.023
mKs 10.746±0.023
mKep 14.854
mW1 10.591±0.022
mW2 10.466±0.020
mW3 10.381±0.086
mW4 >8.636
mGaia 14.679900±0.000763
mB 17.776±0.142
mg 16.8387000±0.0041921
mi 13.90860±0.00332
mr 15.4489000±0.0035419
mu 19.2974000±0.0295905
mz 13.1031000±0.0032623
Mission
K2: Observed in Campaign 3
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
K2 Names
K2 Planets and Candidates
K2 Targets
Stellar Hosts
K2 Time Series
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
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
 --- --- --- --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Transit
Tools
Planetary Systems
Transit Prediction Service
TOI
K2 Names
K2 Planets and Candidates
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
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
--- ---
Teq
(K)
568±35
420.0+26.0-29.0
 590±60 --- --- 547.9231142839565 ---
b
0.36+0.26-0.24
0.715+0.069-0.120
0.68+0.18-0.09
 --- --- --- 0.63
S
(S⨁)
---
21.7+6.0-5.4
 ---
30.1+4.5-3.8
 --- 21.300975278359235 ---
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
 --- --- ---
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
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
 --- --- ---
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)
Print
Known Objects
1 Confirmed Planets
1 K2 Targets
1 2MASS Point Source Catalog
Data Files
1 K2 Time Series
1 Associated Literature Data
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