UPSA Object Registry
Registry · exoplanet

Kepler-12 b

Exoplanet 98 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 04m 58.43s
Declination
+50° 02′ 25.3″
Galactic l, b
80.423, 18.41
Magnitude V
13.47
Distance
881.39 pc

Also known as

1 identifiers

Kepler-12b

Planet

NASA Exoplanet Archive, composite parameters
Host starKepler-12 · G0
DiscoveryTransit, 2011 · Kepler
Orbital period4.43796 d
Semi-major axis0.0553 au
Eccentricity0
Radius19.661 R⊕ · 1.754 R♃
Mass137.3 M⊕ · 0.432 M♃
Density0.11 g/cm³
Equilibrium temperature1,480 K
System distance881.39 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
137.6204 M_earth ± 13.35 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
137.3026 M_earth ± 16.84 Transit NASA Exoplanet Archive Esteves et al. 2015 2015
136.6669 M_earth ± 16.84 Transit NASA Exoplanet Archive Southworth 2012 2012
136.979 M_earth ± 13.03 Transit NASA Exoplanet Archive Fortney et al. 2011 2011

Radius 13 values

ValueUnitUncertainty Band / methodSourceReferenceYear
19.38 R_earth ± 0.49 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
19.565 R_earth ± 0.857 Transit NASA Exoplanet Archive Berger et al. 2018 2018
18.99926 R_earth ± 0.3139 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
17.13 R_earth ± 3.46 Transit NASA Exoplanet Archive Morton et al. 2016 2016
19.66059 R_earth ± 0.3475 Transit NASA Exoplanet Archive Esteves et al. 2015 2015
19.12255 R_earth ± 0.7846 Transit NASA Exoplanet Archive Southworth 2012 2012
20.35653 R_earth ± 1.093 Transit NASA Exoplanet Archive ExoFOP 2011
18.999 R_earth ± 0.314 Transit NASA Exoplanet Archive Fortney et al. 2011 2011
18.22 R_earth ± 3.93 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
17.6 R_earth ± 2.5 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
18.22 R_earth ± 3.93 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
18.22 R_earth ± 3.93 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
Show the remaining 1
ValueUnitUncertainty Band / methodSourceReferenceYear
18.05 R_earth ± 2.92 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Orbital period 17 values

ValueUnitUncertainty Band / methodSourceReferenceYear
4.437963 d ± 2.20e-07 Transit NASA Exoplanet Archive Kokori et al. 2023 2023
4.437965 d ± 1.10e-06 Transit NASA Exoplanet Archive Kokori et al. 2022 2022
4.437962 d ± 1.25e-07 Transit NASA Exoplanet Archive Gajdoš et al. 2019 2019
4.437963 d ± 1.67e-07 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
4.437964 d ± 2.00e-07 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
4.437963 d ± 1.67e-07 Transit NASA Exoplanet Archive Morton et al. 2016 2016
4.437963 d ± 3.00e-08 Transit NASA Exoplanet Archive Holczer et al. 2016 2016
4.437963 d ± 6.00e-07 Transit NASA Exoplanet Archive Esteves et al. 2015 2015
4.437964 d ± 2.00e-07 Transit NASA Exoplanet Archive Southworth 2012 2012
4.437973 d ± 9.58e-06 Transit NASA Exoplanet Archive ExoFOP 2011
4.437963 d ± 1.71e-07 Transit NASA Exoplanet Archive Q1-Q17 DR25 Supplemental KOI Table 2011
4.437964 d ± 2.00e-07 Transit NASA Exoplanet Archive Fortney et al. 2011 2011
Show the remaining 5
ValueUnitUncertainty Band / methodSourceReferenceYear
4.437963 d ± 1.67e-07 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
4.437963 d ± 5.80e-07 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
4.437963 d ± 1.67e-07 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
4.437963 d ± 1.67e-07 Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
4.437963 d ± 1.71e-07 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Semi-major axis 10 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.05434 au ± 0.00078 Transit NASA Exoplanet Archive Fulton & Petigura 2018 2018
0.05563 au ± 0.00084 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
0.0553 au ± 0.001 Transit NASA Exoplanet Archive Esteves et al. 2015 2015
0.0555 au ± 0.0022 Transit NASA Exoplanet Archive Southworth 2012 2012
0.0556 au ± 0.0007 Transit NASA Exoplanet Archive Fortney et al. 2011 2011
0.0545 au Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0.056 au Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0.0545 au Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
0.0545 au Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
0.0545 au Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

Eccentricity 7 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.021 Transit NASA Exoplanet Archive Bonomo et al. 2017 2017
0.01 Transit NASA Exoplanet Archive Fortney et al. 2011 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-Q12 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
1,480 K ± 30 Transit NASA Exoplanet Archive Esteves et al. 2015 2015
1,485 K ± 25 Transit NASA Exoplanet Archive Southworth 2012 2012
1,414.04 K Transit NASA Exoplanet Archive ExoFOP 2011
1,338 K Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
1,314 K Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
1,338 K Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011
1,338 K Transit NASA Exoplanet Archive Q1-Q17 DR24 KOI Table 2011
1,338 K Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
Kepler-12 Eruptive* 0.06886″ —
KOI-4878 Star 102.8″ —
KOI-4878.01 Planet Candidate 102.8″ —
2MASS J19044559+5003117 Star 132″ —
2MASS J19044976+4958378 Star 242.4″ —
2MASS J19045373+5007257 Star 303.7″ —
ZTF J190531.18+500347.5 RRLyrae 326.1″ —
TYC 3549-656-1 EclBin 326.8″ 11.91
2MASS J19043910+4957483 Star 333.7″ —
TYC 3549-465-1 RGB* 334.2″ 10.92
ZTF J190525.46+500645.6 BYDraV* 368.2″ —

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-12-b · Registry entry updated 2026-08-14.