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KELT-21 Overview

KELT-21 1.64 R⦿ 8161.67 K
KELT-21 b
1.586 RJup

KELT-21 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
KELT-21
KELT-21 b 3.61 d 17.78 R⨁ Transit 2018 Johnson et al. 2018 Confirmed Planet
KELT-21 b
RA
20h19m12.01s
Dec
+32d34m51.76s
Distance
470.878+6.471-6.300
pc
Parallax
2.095300±0.028577 mas
Ecliptic Latitude
50.29006 deg
Ecliptic Longitude
318.82096 deg
Galactic Latitude
-1.9865 deg
Galactic Longitude
71.48138 deg
Total Proper Motion
2.2420265±0.0425598 mas/yr
Proper Motion (RA)
2.2392000±0.0425471 mas/yr
Proper Motion (Dec)
-0.1125450±0.0473294 mas/yr
Photometry
mV
10.484±0.006
mTESS
10.4219±0.0061
mJ
10.149±0.022
mH
10.121±0.021
mKs
10.090±0.014
mW1
10.064±0.022
mW2
10.106±0.021
mW3
10.252±0.069
mW4
9.158
mGaia
10.541500±0.000278
mB
10.763±0.082
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
TOI
Stellar Hosts
Source TICv8 Gaia DR2 Johnson et al. 2018 ExoFOP
Teff
(K)
8324.000+336.930-180.785
8161.6665+658.3330-246.6670
7598+81-84
 8324.0±258.9
L✶
(log10(L⦿))
1.102701+0.055690-0.044271
 ---
0.905+0.028-0.030
 ---
Metallicity
(dex)
--- ---
-0.405+0.032-0.033
[Fe/H] 		---
γ
(km/s)
--- --- -13.0±1.0 ---
v sin i
(km/s)
--- --- 146.03±0.48 ---
Age
(Gyr)
--- --- 1.6±0.1 ---
ρ✶
(g/cm3)
0.5774818+0.1150988-0.1079754
 ---
0.468+0.026-0.024
 ---
M✶
(M⦿)
2.053000+0.347598-0.268130
 ---
1.458+0.029-0.028
 ---
R✶
(R⦿)
1.7113500+0.0636312-0.0515146
 --- 1.638±0.034 1.71±0.06
log g
(log10(cm/s2))
4.2837800+0.0706073-0.0799560
 ---
4.173+0.015-0.014
 4.28±0.08
Sp. T
--- --- A8 V ---
Print
Status
Confirmed Planet
Detected By
Transit
Tools
Planetary Systems
Transit Prediction Service
TOI
Transit
Source Johnson et al. 2018 Kokori et al. 2023 Ivshina & Winn 2022 ExoFOP
P
(days)
3.6127647±0.0000033 3.61276958±0.00000095 3.6127691±0.0000012 3.6127710±0.0000024
TC
(days)
2457295.93434+0.00041-0.00042
(BJD-TDB)
2458881.93965±0.00023
(BJD-TDB)
2457902.87891±0.00035
(BJD-TDB)
2460551.040398±0.000298
(BJD)
a/R✶
6.86+0.13-0.12
6.86+0.13-0.12
 --- ---
i
(deg)
86.46+0.38-0.34
86.46+0.38-0.34
 --- ---
Rp/R✶
0.099520+0.000710-0.000730
 0.099520±0.000710 --- ---
Teq
(K)
2051+29-30
 --- --- 2344
b
0.423+0.033-0.039
 --- --- ---
S
(S⨁)
2950±169 --- --- 5011.92
Mp
(M⨁)
<1243 --- --- ---
Mp
(MJup)
<3.91 --- --- ---
Mp sin i
(M⨁)
<1243 --- --- ---
Mp sin i
(MJup)
<3.91 --- --- ---
e
0 --- --- ---
ρ
(g/cm3)
<1.24 --- --- ---
Rp
(R⨁)
17.78+0.44-0.45
 --- --- 19.366200±0.686027
Rp
(RJup)
1.586+0.039-0.040
 --- --- 1.7277396±0.0612033
K
(m/s)
<399.6 --- --- ---
a
(au)
0.05224+0.00035-0.00034
 --- --- ---
δ
(%)
0.9900±0.0140 --- --- 1.1794000±0.0234836
T14
(hours)
4.1054+0.0218-0.0221
 --- --- 4.142±0.349
λ
(deg)
-5.6 +1.7-1.9
 --- --- ---
Print
Known Objects
1 Confirmed Planets
12 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
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  • Kepler | K2
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