UPSA Object Registry
Registry · exoplanet

Kepler-538 b

Exoplanet 48 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 49m 56.77s
Declination
+49° 37′ 24.2″
Galactic l, b
83.142, 11.64
Magnitude V
11.27
Distance
155.96 pc

Also known as

1 identifiers

Kepler-538b

Planet

NASA Exoplanet Archive, composite parameters
Host starKepler-538 · G5V
DiscoveryTransit, 2016 · Kepler
Orbital period81.7378 d
Semi-major axis0.3554 au
Eccentricity0.21
Radius2.215 R⊕ · 0.1976 R♃
Mass12.9 M⊕ · 0.04059 M♃
Density6.5 g/cm³
Equilibrium temperature417 K
System distance155.96 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 3 values

ValueUnitUncertainty Band / methodSourceReferenceYear
10.45979 M_earth ± 4.915 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
12.9 M_earth ± 2.9 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
10.6 M_earth ± 2.5 Transit NASA Exoplanet Archive Mayo et al. 2019 2019

Radius 11 values

ValueUnitUncertainty Band / methodSourceReferenceYear
2.157 R_earth ± 0.052 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
2.215 R_earth ± 0.04 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
2.215 R_earth ± 0.04 Transit NASA Exoplanet Archive Mayo et al. 2019 2019
2.157 R_earth ± 0.052 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
2.135 R_earth ± 0.097 Transit NASA Exoplanet Archive Berger et al. 2018 2018
2.26 R_earth ± 0.1 Transit NASA Exoplanet Archive Morton et al. 2016 2016
2.13 R_earth ± 0.34 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2016
2.13 R_earth ± 0.34 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2016
2.13 R_earth ± 0.34 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2016
2.29 R_earth ± 0.16 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2016
2.16 R_earth ± 0.25 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2016

Orbital period 13 values

ValueUnitUncertainty Band / methodSourceReferenceYear
81.73781 d Transit NASA Exoplanet Archive Weiss et al. 2024 2024
81.73778 d ± 0.00013 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
81.73778 d ± 0.00013 Transit NASA Exoplanet Archive Mayo et al. 2019 2019
81.73806 d ± 5.93e-05 Transit NASA Exoplanet Archive Gajdoš et al. 2019 2019
81.73781 d ± 9.33e-05 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
81.73781 d ± 9.33e-05 Transit NASA Exoplanet Archive Morton et al. 2016 2016
81.73781 d ± 9.33e-05 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2016
81.73765 d ± 1.90e-06 Transit NASA Exoplanet Archive Holczer et al. 2016 2016
81.73781 d ± 9.33e-05 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2016
81.73787 d ± 0.0001024 Transit NASA Exoplanet Archive Q1-Q17 DR25 Supplemental KOI Table 2016
81.73781 d ± 9.33e-05 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2016
81.73747 d ± 0.00029 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2016
Show the remaining 1
ValueUnitUncertainty Band / methodSourceReferenceYear
81.73787 d ± 0.0001024 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2016

Semi-major axis 9 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.3533571 au Transit NASA Exoplanet Archive Weiss et al. 2024 2024
0.3554 au ± 0.0068 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
0.4669 au ± 0.0087 Transit NASA Exoplanet Archive Mayo et al. 2019 2019
0.35355 au ± 0.00426 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
0.353 au Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2016
0.353 au Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2016
0.353 au Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2016
0.349 au Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2016
0.3539 au Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2016

Eccentricity 8 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0 Transit NASA Exoplanet Archive Weiss et al. 2024 2024
0.21 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
0.041 ± 0.034 Transit NASA Exoplanet Archive Mayo et al. 2019 2019
0 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2016
0 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2016
0 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2016
0 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2016
0 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2016

Equilibrium temperature 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
417 K ± 5 Transit NASA Exoplanet Archive Bonomo et al. 2023 2023
380 K Transit NASA Exoplanet Archive Mayo et al. 2019 2019
381 K Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2016
381 K Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2016
381 K Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2016
380 K Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2016
385 K Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2016

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
Kepler-538 EmLine* 0.7744″ 11.34
2MASS J19495888+4939017 Star 99.6″ —
2MASS J19494710+4936334 Star 106.8″ —
TYC 3565-977-1 Star 128.6″ 11.11
UCAC4 698-072452 RGB* 148″ 12.99
UCAC4 699-070047 Star 156″ 12.06
UCAC4 698-072471 RGB* 219.7″ 14.24
UCAC4 699-070156 gammaDorV* 246.8″ 12.36
2MASS J19493741+4934396 Star 250″ —
UCAC4 698-072506 Star 250.2″ 13.33
2MASS J19501459+4934230 Star 250.8″ —

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-538-b · Registry entry updated 2026-08-14.