Registry · exoplanet

Kepler-20 g

Exoplanet 16 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-20g

Planet

NASA Exoplanet Archive, composite parameters

Host star	Kepler-20 · G5V
Discovery	Radial Velocity, 2016 · Multiple Observatories
Orbital period	34.94 d
Semi-major axis	0.2055 au
Eccentricity	0.15
Radius	4.71 R⊕ · 0.42 R♃
Mass	19.96 M⊕ · 0.0628 M♃
Density	1.05 g/cm³
Equilibrium temperature	524 K
System distance	282.56 pc

Recorded parameters

1 quantity with a single published value

Parameter	Value	Unit	Uncertainty	As published	Source	Reference
Equilibrium temperature	524	K	± 12	Radial Velocity	NASA Exoplanet Archive	Buchhave et al. 2016

Published measurements

4 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 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
20.97015	M_earth	± 3.373	Radial Velocity	NASA Exoplanet Archive	Weiss et al. 2024	2024
19.96	M_earth	± 3.08	Radial Velocity	NASA Exoplanet Archive	Buchhave et al. 2016	2016

Orbital period 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
34.95101	d	± 0.04344	Radial Velocity	NASA Exoplanet Archive	Weiss et al. 2024	2024
34.94	d	± 0.038	Radial Velocity	NASA Exoplanet Archive	Buchhave et al. 2016	2016

Semi-major axis 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.2050831	au		Radial Velocity	NASA Exoplanet Archive	Weiss et al. 2024	2024
0.2055	au	± 0.0022	Radial Velocity	NASA Exoplanet Archive	Buchhave et al. 2016	2016

Eccentricity 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0			Radial Velocity	NASA Exoplanet Archive	Weiss et al. 2024	2024
0.15		± 0.01	Radial Velocity	NASA Exoplanet Archive	Buchhave et al. 2016	2016

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
Kepler-20 d	Exoplanet	0″	12.61
Kepler-20 b	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

Archive	Read at (UTC)	Record
Seeded from the bulk archive load; no per-object fetch yet.

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