Kepler-21 Overview

Kepler-21 B
Kepler-21 1.90 R⦿ 6305.00 K
Kepler-21 b
0.146 RJup
Architecture
Kepler-21
Kepler-21 B
Kepler-21
Kepler-21 b
Discovery Data
Host Planet Method Year Reference Disposition
Kepler-21 Kepler-21 b Transit 2012 Howell et al. 2012 Confirmed Planet
Kepler-21
  • This reference contains discussion regarding the stellar multiplicity of this system. (Ginski et al. 2016)
Kepler-21 b
  • Orbital period, transit mid-point, transit duration, Rp/Rs and their errors taken from DR24 KOI table. Planet radius error propagated from stellar radius error in ref. and Rp/Rs error. (Morton et al. 2016)
  • Parameters drawn from Table 2 unless only available in Table 1. (López-Morales et al. 2016)
RA
---
Dec
---
Distance
---
Parallax
---
Ecliptic Latitude
---
Ecliptic Longitude
---
Galactic Latitude
---
Galactic Longitude
---
Total Proper Motion
---
Proper Motion (RA)
---
Proper Motion (Dec)
---
Photometry
mV
---
mTESS
---
mJ
---
mH
---
mKs
---
mKep
---
mW1
---
mW2
---
mW3
---
mW4
---
mGaia
---
mB
---
mg
---
mr
---
RA
19h09m26.87s
Dec
+38d42m50.90s
Distance
108.522+0.385-0.382
pc
Parallax
9.1859100±0.0323071 mas
Ecliptic Latitude
60.46565 deg
Ecliptic Longitude
298.18275 deg
Galactic Latitude
13.33672 deg
Galactic Longitude
69.85644 deg
Total Proper Motion
39.9798601±0.0546273 mas/yr
Proper Motion (RA)
27.9510000±0.0535832 mas/yr
Proper Motion (Dec)
28.5855000±0.0556072 mas/yr
Photometry
mV
8.25±0.03
mTESS
7.76486±0.00610
mJ
7.229±0.032
mH
7.031±0.023
mKs
6.945±0.018
mKep
8.224
mW1
6.897±0.060
mW2
6.926±0.021
mW3
6.955±0.016
mW4
6.957±0.075
mGaia
8.128320±0.000459
mB
8.431±0.000
mg
8.738
mr
8.259
Abundances
(Hypatia Catalog)
[Fe/H] -0.04±0.16 dex
[C/H] -0.06±0.09 dex
[O/H] -0.02±0.12 dex
[Na/H] -0.18±0.18 dex
[Mg/H] -0.04±0.07 dex
[Al/H] -0.26±0.06 dex
[Si/H] -0.07±0.12 dex
[Ca/H] -0.03±0.06 dex
[Y/H] -0.01±0.09 dex
Source Bonomo et al. 2023
TICv8
Berger et al. 2018
Gaia DR2 López-Morales et al. 2016
Morton et al. 2016
Sousa et al. 2015 Chaplin et al. 2014 Mortier et al. 2013 Batalha et al. 2013 Howell et al. 2011
Nordstrom et al. 2004 Cannon & Pickering 1918 Fulton & Petigura 2018
Q1-Q17 DR25 Supplemental KOI Table Q1-Q17 DR25 KOI Table
Q1-Q17 DR24 KOI Table
Q1-Q16 KOI Table
Q1-Q12 KOI Table
Q1-Q8 KOI Table
Q1-Q6 KOI Table Show Candidate Solutions >> << Hide Candidate Solutions
Teff
(K)
6305±50
6248.420+146.589-125.121
6202±124
6110.025+284.035-132.525
6305±50
6162.000+19.982-61.768
6269±47 --- 6409±44 6131 6131±44 --- --- 6202±60 ---
6202 +74-83
6131±44 6131±44 6131.00±44.00 6131.00±44.00 6131
Metallicity
(dex)
-0.030±0.100 [Fe/H] -0.0793270±0.0035632 [M/H] --- --- -0.030±0.100 [Fe/H]
-0.120+0.042-0.045
[Fe/H]
0.03±0.03 [Fe/H] --- -0.03±0.03 [Fe/H] --- -0.15±0.06 [Fe/H] --- --- -0.04±0.04 [Fe/H] --- -0.1±0.15 [Fe/H] -0.150±0.060 [Fe/H] -0.150±0.060 [Fe/H] -0.150±0.060 [Fe/H] --- ---
Age
(Gyr)
2.84±0.35 --- --- --- 3.03±0.35
3.55+0.55-0.52
2.818±0.341
4.4+3.1-0.7
--- --- 2.84±0.34 --- ---
3.98+0.38-1.10
--- --- --- --- --- 3.35±0.74 ---
M
(M⦿)
1.408+0.021-0.030
1.212000+0.198828-0.141189
--- ---
1.408+0.021-0.030
1.240+0.060-0.043
1.372±0.049
1.33+0.08-0.23
1.17±0.08 --- 1.340±0.010 --- ---
1.245+0.102-0.032
---
1.162 +0.147-0.079
1.34±0.01 1.34±0.01 1.3400±0.0100 1.3600±0.1100 ---
R
(R⦿)
1.902+0.018-0.012
1.907460+0.137764-0.053206
1.945+0.081-0.077
1.9703554+0.0883366-0.1711650
1.902+0.018-0.012
1.790+0.045-0.037
1.863±0.126
1.89+0.04-0.11
1.11±0.09 2.04 1.860±0.020 --- ---
1.940+0.042-0.041
---
1.733 +0.118-0.095
1.86±0.02 1.86±0.02 1.8600±0.0200 2.0400±0.2800 2.04
Prot
(days)
13.42+0.24-0.47
--- --- --- 14.83±2.41 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
ρ
(g/cm3)
---
0.2462092+0.0598203-0.0506648
--- ---
0.287+0.004-0.005
--- ---
0.2771+0.0070-0.0069
0.20±0.01 ---
0.2886 +0.0077-0.0102
--- --- 0.17±0.01 ---
0.06279 +0.38585-0.00178
0.42980 +0.16108-0.02744
0.42980 +0.16108-0.02744
0.42980 +0.16108-0.02744
--- ---
log g
(log10(cm/s2))
---
3.9606600+0.0931749-0.0746046
--- --- 4.026±0.004 4.030±0.006 4.07±0.06
4.008+0.011-0.031
4.43±0.06 3.95
4.0190 +0.0087-1.0694
--- --- --- ---
4.026 +0.033-0.027
4.026±0.006 4.026±0.006 4.026±0.006 3.950±0.100 3.95
γ
(km/s)
--- --- --- -18.785370310404630±0.195608472688242 --- --- --- --- --- --- -19.1±0.3 -18.9±0.3 --- --- --- --- --- --- --- --- ---
v sin i
(km/s)
--- --- --- --- 8.4±0.5 --- --- --- --- --- 7.75±1.0 9 --- --- --- --- --- --- --- --- ---
L
(log10(L⦿))
---
0.6986847+0.0155972-0.0212841
---
0.68795576+0.00238849-0.00240169
0.7150+0.0117-0.0108
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Sp. T
--- --- --- --- --- --- --- --- --- --- F6 IV --- G0 --- --- --- --- --- --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Source Bonomo et al. 2023
Berger et al. 2018
López-Morales et al. 2016
Holczer et al. 2016
Morton et al. 2016
Howell et al. 2011
Fulton & Petigura 2018
Q1-Q17 DR25 Supplemental KOI Table
Q1-Q17 DR25 KOI Table
Q1-Q17 DR24 KOI Table
Q1-Q16 KOI Table
Q1-Q12 KOI Table
Q1-Q8 KOI Table
Show Candidate Solutions >> << Hide Candidate Solutions
a/R
--- ---
4.929+0.048-0.047
--- ---
4.910 +0.043-0.058
--- --- 2.95±1.4 5.61±2.1 5.61±2.1 5.61±2.1 6.21±0.58
Teq
(K)
2015±16 --- 2025±20 --- --- 1956±297 --- --- 1784 1785 1785 1785 1863
b
--- ---
0.584+0.018-0.020
--- ---
0.640 +0.020-0.028
--- ---
0.893 +0.005-0.644
0.4309 +0.0575-0.3949
0.4309 +0.0575-0.3949
0.4309 +0.0575-0.3949
0.181±0.1
S
(S)
2749±90
3021.187+54.671-53.833
--- --- --- --- 2871.7±196.8 ---
2388.98 +468.82-366.72
2399.40 +123.01-118.00
2399.40 +123.01-118.00
2399.40 +123.01-118.00
---
e
0 --- 0.020±0.100 --- --- 0 --- --- 0 0 0 0 0
i
(deg)
83.20+0.28-0.26
---
83.20+0.28-0.26
--- ---
82.58 +0.28-0.31
--- --- 72.39 85.37 85.37 85.37 88.24
P
(days)
2.7858212±0.0000032 --- 2.78578±0.00003 2.78581504±0.00000166 2.785821693±3.78e-06
2.785755 +0.000031-0.000034
2.785821693±0.000003780 2.785821236±5.258e-06 2.785821236±5.258e-06 2.785821693±3.78e-06 2.785821693±3.78e-06 2.785821693±3.78e-06 2.785819±1.7e-05
Rp
(R)
1.639+0.019-0.015
1.894+0.080-0.258
1.639+0.019-0.015
---
1.57+0.04-0.06
1.6354 +0.0381-0.0426
1.654±0.046 ---
1.69 +0.11-0.09
1.59 +0.01-0.02
1.59 +0.01-0.02
1.59 +0.01-0.02
1.72±0.24
Rp
(RJup)
0.1462+0.0017-0.0013
0.1690+0.0071-0.0230
0.1462+0.0017-0.0013
---
0.140+0.004-0.005
0.1459 +0.0034-0.0038
0.1476±0.0041 ---
0.151+0.010-0.008
0.142+0.001-0.002
0.142+0.001-0.002
0.142+0.001-0.002
0.153±0.021
Rp/R
--- --- 0.007885±0.000050 ---
0.007805 +2.7e-05-0.000243
0.00806 +0.00018-0.00019
0.007805+0.000027-0.000243
---
0.008919 +6.3e-05-0.001163
0.007805 +2.7e-05-0.000243
0.007805 +2.7e-05-0.000243
0.007805 +2.7e-05-0.000243
0.00774±0.0001
a
(au)
0.04340+0.00021-0.00032
--- 0.0427172±0.0000003 --- ---
0.042507 +0.000098-0.000119
0.04171±0.00074 --- .0408 .0427 .0427 .0427 .043
δ
(%)
--- --- 0.006217±0.000078 0.0071 --- --- --- --- 0.00689±0.00015 0.00698±0.00011 0.00698±0.00011 0.00698±0.00011 0.00720
T14
(hours)
--- --- 3.590±0.046 3.8375 3.4834±0.0332
3.438666 +0.070336-0.091437
--- --- 3.5599±0.0416 3.4834±0.0332 3.4834±0.0332 3.4834±0.0332 3.4109
TC
(days)
2455093.83716±0.00085 --- 2456798.7188±0.0001 2454954.547707±0.001451 2455093.836498±0.000980 2455093.8369±0.0016 --- 2455093.837±0.00138 2455093.837±0.00138 2455093.836±0.00098 2455093.836±0.00098 2455093.836±0.00098 2455093.8369±0.0014
Mp
(M)
7.5±1.3 --- 5.08±1.72 --- --- <10.4 --- --- --- --- --- --- ---
Mp
(MJup)
0.024±0.004 --- 0.0160±0.0054 --- --- <0.033 --- --- --- --- --- --- ---
ρ
(g/cm3)
9.30±1.60 --- 6.4±2.1 --- --- <12.9 --- --- --- --- --- --- ---
Tp
(days)
--- --- 2456797.9±0.7 --- --- --- --- --- --- --- --- --- ---
ω
(deg)
--- --- -15±79 --- --- --- --- --- --- --- --- --- ---
K
(m/s)
2.70±0.46 --- 1.99±0.65 --- --- --- --- --- --- --- --- --- ---
Kepler Detection Products (4 File Types, 16 Files)
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     121 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Kepler Detection Products
Kepler Pipeline Data Validation Summaries q1_q12_tce q1_q16_tce q1_q17_dr24_tce q1_q17_dr25_tce
Kepler Object of Interest
KepID 3632418 3632418 3632418 3632418 3632418 3632418 3632418
KOI Name K00975.01 K00975.01 K00975.01 K00975.01 K00975.01 K00975.01 K00975.01
Kepler Name Kepler-21 b Kepler-21 b Kepler-21 b Kepler-21 b Kepler-21 b Kepler-21 b Kepler-21 b
Exoplanet Archive Disposition CONFIRMED CONFIRMED CONFIRMED CONFIRMED CONFIRMED CONFIRMED CONFIRMED
Vetting Status Done Done Done Done Done Done Done
Date of Last Parameter Update 2018-08-16 2017-08-31 2015-09-24 2014-12-18 2014-12-04 2014-01-07 2013-02-12
Disposition Using Kepler Data CANDIDATE CANDIDATE CANDIDATE NOT DISPOSITIONED NOT DISPOSITIONED NOT DISPOSITIONED CANDIDATE
Not Transit-Like False Positive Flag 0 0 0 0 0 --- ---
Stellar Eclipse False Positive Flag 0 0 0 0 0 --- ---
Centroid Offset False Positive Flag 0 0 0 0 0 --- ---
Ephemeris Match Indicates Contamination False Positive Flag 0 0 0 0 0 --- ---
Disposition Provenance q1_q17_dr25_sup_koi q1_q17_dr25_koi q1_q17_dr24_koi q1_q16_koi q1_q12_koi q1_q8_koi q1_q6_kepler_candidates
Orbital Period [days] 2.785821236±5.258e-06 2.785821236±5.258e-06 2.785821693±3.78e-06 2.785821693±3.78e-06 2.785821693±3.78e-06 2.785819±1.7e-05 2.785819±1.7e-05
Transit Epoch [BKJD] 260.83731±0.00138 260.83731±0.00138 260.836498±0.00098 260.836498±0.00098 260.836498±0.00098 260.8369±0.0014 260.8369±0.0014
Transit Epoch [BJD] 2455093.837±0.00138 2455093.837±0.00138 2455093.836±0.00098 2455093.836±0.00098 2455093.836±0.00098 2455093.8369±0.0014 2455093.8369±0.0014
Parameters Provenance q1_q17_dr25_sup_koi q1_q17_dr25_koi q1_q17_dr24_koi q1_q16_koi q1_q12_koi q1_q8_koi q1_q6_kepler_candidates
Number of Planets 1 1 1 1 1 1 1
TCE Delivery q1_q17_dr25_tce q1_q17_dr25_tce q1_q17_dr24_tce q1_q16_tce q1_q12_tce --- ---
Link to DV Report kplr003632418-20160209194854_dvr.pdf kplr003632418-20160209194854_dvr.pdf kplr003632418-20141002224145_dvr.pdf kplr003632418-20130815195353_dvr.pdf kplr003632418-20121029204534_dvr.pdf --- ---
RA [decimal degrees] 287.36181999999997 287.36181999999997 287.36181999999997 287.36181999999997 287.36181999999997 287.36181999999997 287.36181999999997
Dec [decimal degrees] 38.714016 38.714016 38.714016 38.714016 38.714016 38.714016 38.714016
Kepler-band [mag] 8.224 8.224 8.224 8.224 8.224 8.224 8.224
g'-band [mag] 8.738 8.738 8.738 8.738 8.738 8.738 8.738
r'-band [mag] 8.259 8.259 8.259 8.259 8.259 8.259 8.259
J-band [mag] 7.229 7.229 7.229 7.229 7.229 7.229 7.229
H-band [mag] 7.031000000000001 7.031000000000001 7.031000000000001 7.031000000000001 7.031000000000001 7.031000000000001 7.031000000000001
K-band [mag] 6.945 6.945 6.945 6.945 6.945 6.945 6.945
Disposition Score --- 1.0 --- --- --- --- ---
Comment --- CENT_SATURATED EYEBALL---SATURATED --- --- --- ---
Eccentricity --- 0 0 0 0 0 0
Impact Parameter ---
0.893 +0.005-0.644
0.4309 +0.0575-0.3949
0.4309 +0.0575-0.3949
0.4309 +0.0575-0.3949
0.181±0.1 0.18±0.23
Transit Duration [hrs] --- 3.5599±0.0416 3.4834±0.0332 3.4834±0.0332 3.4834±0.0332 3.4109 3.4109
Transit Depth [ppm] --- 68.9±1.5 69.8±1.1 69.8±1.1 69.8±1.1 72 72
Planet-Star Radius Ratio ---
0.008919 +6.3e-05-0.001163
0.007805 +2.7e-05-0.000243
0.007805 +2.7e-05-0.000243
0.007805 +2.7e-05-0.000243
0.00774±0.0001 0.00774±0.0001
Fitted Stellar Density [g/cm**3] ---
0.06279 +0.38585-0.00178
0.42980 +0.16108-0.02744
0.42980 +0.16108-0.02744
0.42980 +0.16108-0.02744
--- ---
Planetary Fit Type --- LS+MCMC MCMC MCMC MCMC --- ---
Planetary Radius [Earth radii] ---
1.69 +0.11-0.09
1.59 +0.01-0.02
1.59 +0.01-0.02
1.59 +0.01-0.02
1.72±0.24 1.72
Orbit Semi-Major Axis [au] --- .0408 .0427 .0427 .0427 .043 .043
Inclination [deg] --- 72.39 85.37 85.37 85.37 88.24 ---
Equilibrium Temperature [K] --- 1784 1785 1785 1785 1863 1863
Insolation Flux [Earth flux] ---
2388.98 +468.82-366.72
2399.40 +123.01-118.00
2399.40 +123.01-118.00
2399.40 +123.01-118.00
--- ---
Planet-Star Distance over Star Radius --- 2.95±1.4 5.61±2.1 5.61±2.1 5.61±2.1 6.21±0.58 6.21±0.58
Limb Darkening Model --- Claret (2011 A&A 529 75) ATLAS LS Claret (2011 A&A 529 75) ATLAS LS Claret (2011 A&A 529 75) ATLAS LS Claret (2011 A&A 529 75) ATLAS LS Claret (2011 A&A 529 75) ATLAS LS Claret (2011 A&A 529 75) ATLAS LS
Limb Darkening Coeff. 4 --- 0.0 0.0 0.0 0.0 0.16690000000000002 ---
Limb Darkening Coeff. 3 --- 0.0 0.0 0.0 0.0 -0.5696 ---
Limb Darkening Coeff. 2 --- 0.303 0.2974 0.2974 0.2974 0.747 ---
Limb Darkening Coeff. 1 --- 0.3166 0.329 0.329 0.329 0.3548 ---
Maximum Single Event Statistic --- 12.460802 44.719574 --- --- --- ---
Maximum Multiple Event Statistic --- 47.588837 49.623034999999994 --- --- --- ---
Transit Signal-to-Noise --- 53.6 77.7 77.7 77.7 71.10000000000001 50.1
Number of Transits --- 486 486 --- --- --- ---
TCE Planet Number --- 1 1 1 1 --- ---
Quarters --- 11111111111111111000000000000000 11111111111111111000000000000000 --- --- --- ---
Odd-Even Depth Comparision Statistic --- 0.3936 --- --- --- --- ---
Transit Model --- Mandel and Agol (2002 ApJ 580 171) Mandel and Agol (2002 ApJ 580 171) Mandel and Agol (2002 ApJ 580 171) Mandel and Agol (2002 ApJ 580 171) Mandel and Agol (2002 ApJ 580 171) Mandel and Agol (2002 ApJ 580 171)
Link to DV Summary --- kplr003632418-001-20160209194854_dvs.pdf kplr003632418-001-20141002224145_dvs.pdf kplr003632418-001-20130826182306_dvs.pdf kplr003632418-001-20121115231752_dvs.pdf --- ---
Stellar Effective Temperature [K] ---
6202 +74-83
6131±44 6131±44 6131.00±44.00 6131.00±44.00 6131
Stellar Surface Gravity [log10(cm/s**2)] ---
4.026 +0.033-0.027
4.026±0.006 4.026±0.006 4.026±0.006 3.950±0.100 3.95
Stellar Metallicity [dex] --- -0.1±0.15 -0.150±0.060 -0.150±0.060 -0.150±0.060 --- ---
Stellar Radius [Solar radii] ---
1.733 +0.118-0.095
1.86±0.02 1.86±0.02 1.8600±0.0200 2.0400±0.2800 2.04
Stellar Mass [Solar mass] ---
1.162 +0.147-0.079
1.34±0.01 1.34±0.01 1.3400±0.0100 1.3600±0.1100 ---
Stellar Parameter Provenance --- q1_q17_dr25_stellar stellar_q1_q16 stellar_q1_q16 stellar_q1_q16 SME SME
FW Offset Significance [percent] --- 0.0 0.0 0.0 0.0 --- ---
FW Source α(OOT) [hrs] --- 19.157345±0.000012 19.157344±0.000013 19.157331±0.000012 19.157333000±0.000015000 --- ---
FW Source δ(OOT) [deg] --- 38.713073±0.000099 38.7131±0.0001 38.71293±0.00012 38.71273000±0.00013000 --- ---
FW Source Δα(OOT) [sec] --- -4.6±0.5 -4.63±0.53 -5.19±0.53 -0.23600±0.05200 --- ---
FW Source Δδ(OOT) [arcsec] --- -3.4±0.36 -3.29±0.38 -3.9±0.41 -0.21200±0.03100 --- ---
FW Δα(OOT) [sec] --- 0.000154±3.4e-05 0.000159±3.6e-05 0.000195±3.6e-05 1.65e-05±3.7e-06 --- ---
FW Δδ(OOT) [arcsec] --- 0.000133±2.4e-05 0.000128±2.6e-05 0.000167±2.8e-05 1.48e-05±2.2e-06 --- ---
PRF ΔαSQ(OOT) [arcsec] --- -3.5±1.2 -1.6±1.1 -3.1±1.4 -0.6300±0.5200 --- ---
PRF ΔδSQ(OOT) [arcsec] --- -6.7±1.4 -2.8±1.5 -0.9±1.5 -0.4000±2.0000 --- ---
PRF ΔθSQ(OOT) [arcsec] --- 7.5±1.4 3.2±1.4 3.2±1.6 0.8000±1.2000 --- ---
PRF ΔαSQ(KIC) [arcsec] --- -3.1±1.2 -3±1.1 -2.8±1.3 -2.8700±0.4400 --- ---
PRF ΔδSQ(KIC) [arcsec] --- -4.1±1.3 -2.8±1.5 -3.1±1.6 -1.7000±2.0000 --- ---
PRF ΔθSQ(KIC) [arcsec] --- 5.1±1.4 4.1±1.4 4.1±1.7 3.3000±1.1000 --- ---
Chi-Square --- --- --- --- --- 1.31 1.28
Stellar Age [Gyr] --- --- --- --- --- 3.35±0.74 ---
Known Objects
1 Confirmed Planets
1 Kepler Objects of Interest (KOIs)
1 Threshold Crossing Events (TCEs)
3 2MASS Point Source Catalog
Data Files
2 Kepler Time Series
1 SuperWASP Time Series
1 Associated Literature Data
Known Objects
1 Confirmed Planets
1 Kepler Objects of Interest (KOIs)
1 Threshold Crossing Events (TCEs)
3 2MASS Point Source Catalog
Data Files
2 Kepler Time Series
1 SuperWASP Time Series
1 Associated Literature Data
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