UPSA Object Registry
Registry · exoplanet

Kepler-20 b

Exoplanet 125 papers
harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.
Right ascension
19h 10m 47.52s
Declination
+42° 20′ 18.9″
Galactic l, b
73.377, 14.57
Magnitude V
12.61
Distance
282.56 pc

Also known as

1 identifiers

Kepler-20b

Planet

NASA Exoplanet Archive, composite parameters
Host starKepler-20 · G5V
DiscoveryTransit, 2011 · Kepler
Orbital period3.6961 d
Semi-major axis0.04565 au
Eccentricity0.083
Radius1.773 R⊕ · 0.1582 R♃
Mass9.7 M⊕ · 0.03052 M♃
Density9.4 g/cm³
Equilibrium temperature1,187 K
System distance282.56 pc

Published measurements

6 quantities measured more than once
One object can carry a dozen published estimates of the same quantity. The register keeps them side by side rather than picking a winner — the citation is part of the value.

Mass 4 values

ValueUnitUncertainty Band / methodSourceReferenceYear
9.512975 M_earth ± 1.459 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
9.7 M_earth ± 1.3 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
9.7 M_earth ± 1.41 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
8.7 M_earth ± 2.1 Transit NASA Exoplanet Archive Gautier et al. 2012 2012

Radius 12 values

ValueUnitUncertainty Band / methodSourceReferenceYear
2.007 R_earth ± 0.183 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
1.773 R_earth ± 0.053 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
2.007 R_earth ± 0.183 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
1.708 R_earth ± 0.08 Transit NASA Exoplanet Archive Berger et al. 2018 2018
1.868 R_earth ± 0.066 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
2.13 R_earth ± 0.22 Transit NASA Exoplanet Archive Morton et al. 2016 2016
1.91 R_earth ± 0.12 Transit NASA Exoplanet Archive Gautier et al. 2012 2012
2.11 R_earth ± 0.37 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
2.11 R_earth ± 0.37 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
1.97 R_earth ± 0.16 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
2.11 R_earth ± 0.37 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
1.78 R_earth ± 0.19 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Orbital period 14 values

ValueUnitUncertainty Band / methodSourceReferenceYear
3.69612 d Transit NASA Exoplanet Archive Weiss et al. 2024 2024
3.696105 d ± 1.60e-06 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
3.696105 d ± 1.56e-06 Transit NASA Exoplanet Archive Gajdoš et al. 2019 2019
3.69612 d ± 2.31e-06 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
3.696118 d ± 6.60e-07 Transit NASA Exoplanet Archive Holczer et al. 2016 2016
3.696115 d ± 1.15e-06 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
3.69612 d ± 2.31e-06 Transit NASA Exoplanet Archive Morton et al. 2016 2016
3.696122 d ± 4.30e-06 Transit NASA Exoplanet Archive Gautier et al. 2012 2012
3.696121 d ± 2.39e-06 Transit NASA Exoplanet Archive Q1-Q17 DR25 Supplemental KOI Table 2011
3.69612 d ± 2.31e-06 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
3.69612 d ± 2.31e-06 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
3.696116 d ± 4.40e-06 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
Show the remaining 2
ValueUnitUncertainty Band / methodSourceReferenceYear
3.69612 d ± 2.31e-06 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
3.696121 d ± 2.39e-06 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Semi-major axis 10 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.04586212 au Transit NASA Exoplanet Archive Weiss et al. 2024 2024
0.04565 au ± 0.00089 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
0.04588 au ± 0.00038 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
0.0463 au ± 0.0009 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
0.04537 au ± 0.00054 Transit NASA Exoplanet Archive Gautier et al. 2012 2012
0.0448 au Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
0.0448 au Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0.045 au Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0.0448 au Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
0.0448 au Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Eccentricity 9 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
0.083 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
0.03 ± 0.09 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
0.32 Transit NASA Exoplanet Archive Gautier et al. 2012 2012
0 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Equilibrium temperature 8 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1,187 K ± 16 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
1,105 K ± 37 Transit NASA Exoplanet Archive Buchhave et al. 2016 2016
1,014 K Transit NASA Exoplanet Archive Gautier et al. 2012 2012
1,095 K Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
1,095 K Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
1,097 K Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
1,095 K Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
1,095 K Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
Kepler-20 d Exoplanet 0″ 12.61
Kepler-20 g Exoplanet 0″ 12.61
Kepler-20 f Exoplanet 0″ 12.61
Kepler-20 e Exoplanet 0″ 12.61
Kepler-20 c Exoplanet 0″ 12.61
Kepler-20 Star 0.4242″ 12.63
TYC 3129-770-1 Star 19.17″ 11.56
TYC 3129-1100-1 RGB* 113.7″ 11.13
TYC 3129-518-1 HorBranch* 134.9″ 11.2
2MASS J19104137+4222179 Star 137.1″ —
2MASS J19103219+4221400 Star 188.2″ —

Provenance

where this card came from
ArchiveRead at (UTC)Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/kepler-20-b · Registry entry updated 2026-08-14.