UPSA Object Registry
Registry · exoplanet

Kepler-42 c

Exoplanet 55 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 28m 52.70s
Declination
+44° 37′ 02.5″
Galactic l, b
76.917, 12.55
Magnitude V
16.7
Distance
40.059 pc

Also known as

1 identifiers

Kepler-42c

Planet

NASA Exoplanet Archive, composite parameters
Host starKepler-42 · M4V
DiscoveryTransit, 2011 · Kepler
Orbital period0.453285 d
Semi-major axis0.006 au
Eccentricity0
Radius0.73 R⊕ · 0.065 R♃
Mass60.337 M⊕ · 0.1898 M♃
Density98 g/cm³
Equilibrium temperature720 K
System distance40.059 pc

Recorded parameters

1 quantity with a single published value
ParameterValueUnitUncertainty As publishedSourceReference
Mass 60.337 M_earth Transit NASA Exoplanet Archive Ofir et al. 2025

Published measurements

5 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.

Radius 9 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.887 R_earth ± 0.025 Transit NASA Exoplanet Archive Berger et al. 2018 2018
0.73 R_earth ± 0.03 Transit NASA Exoplanet Archive Mann et al. 2017 2017
0.885 R_earth ± 0.304 Transit NASA Exoplanet Archive Mann et al. 2013 2013
3.38 R_earth ± 0.46 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.73 R_earth ± 0.2 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.92 R_earth ± 0.22 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0.76 R_earth ± 0.19 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011
3.19 R_earth Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0.92 R_earth ± 0.22 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011

Orbital period 9 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.4532874 d ± 1.00e-07 Transit NASA Exoplanet Archive Ofir et al. 2025 2025
0.4532873 d ± 5.00e-08 Transit NASA Exoplanet Archive Mann et al. 2017 2017
0.453288 d ± 9.00e-07 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.4532851 d ± 9.70e-07 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.4532873 d ± 8.60e-08 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0.4532874 d ± 1.02e-07 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011
0.4532875 d ± 1.50e-06 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0.4532874 d ± 1.02e-07 Transit NASA Exoplanet Archive Q1-Q17 DR25 Supplemental KOI Table 2011
0.4532873 d ± 8.60e-08 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011

Semi-major axis 6 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.00598 au ± 0.00028 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.006 au Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
0.0058 au Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0.0059 au Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011
0.01 au Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0.0058 au Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011

Eccentricity 5 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0 ± 0.1 Transit NASA Exoplanet Archive Mann et al. 2017 2017
0 Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
0 Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011

Equilibrium temperature 6 values

ValueUnitUncertainty Band / methodSourceReferenceYear
730 K Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
720 K ± 73 Transit NASA Exoplanet Archive Muirhead et al. 2012 2012
733 K Transit NASA Exoplanet Archive Q1-Q16 KOI Table 2011
729 K Transit NASA Exoplanet Archive Q1-Q17 DR25 KOI Table 2011
1,524 K Transit NASA Exoplanet Archive Q1-Q8 KOI Table 2011
733 K Transit NASA Exoplanet Archive Q1-Q12 KOI Table 2011

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
Kepler-42 b Exoplanet 0″ 16.7
Kepler-42 d Exoplanet 0″ 16.7
Kepler-42 HighPM* 6.629″ —
2MASS J19284798+4439074 Star 134.7″ —
UCAC4 674-072272 RGB* 148.9″ 12.88
UCAC4 674-072189 HorBranch* 180.7″ 11.78
BD+44 3149 RGB* 188.7″ 10.08
2MASS J19291000+4437431 Star 189.1″ —
TYC 3146-802-1 delSctV* 197.7″ 10.46
KOI-3450 Star 201.4″ —
2MASS J19285973+4440110 Star 202.8″ —

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-42-c · Registry entry updated 2026-08-14.