Registry · exoplanet

Kepler-197 d

Exoplanet 35 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 40m 54.35s
Declination: +50° 33′ 33.2″
Galactic l, b: 83.304, 13.36
Magnitude V: 11.78
Distance: 330.57 pc

Also known as

1 identifiers

Kepler-197d

Planet

NASA Exoplanet Archive, composite parameters

Host star	Kepler-197 · F5
Discovery	Transit, 2014 · Kepler
Orbital period	15.6776 d
Semi-major axis	0.119 au
Eccentricity	0.03
Radius	1.22 R⊕ · 0.109 R♃
Mass	1.98 M⊕ · 0.00624 M♃
Density	5.99 g/cm³
Equilibrium temperature	810 K
System distance	330.57 pc

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 11 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1.191	R_earth	± 0.04	Transit	NASA Exoplanet Archive	Weiss et al. 2024	2024
1.191	R_earth	± 0.04	Transit	NASA Exoplanet Archive	Fulton & Petigura 2018	2018
1.5	R_earth	± 0.13	Transit	NASA Exoplanet Archive	Berger et al. 2018	2018
1.15	R_earth	± 0.05	Transit	NASA Exoplanet Archive	Morton et al. 2016	2016
1.244	R_earth	± 0.049	Transit	NASA Exoplanet Archive	Van Eylen & Albrecht 2015	2015
1.42	R_earth	± 0.05	Transit	NASA Exoplanet Archive	Q1-Q17 DR25 KOI Table	2014
1.15	R_earth	± 0.03	Transit	NASA Exoplanet Archive	Q1-Q12 KOI Table	2014
1.36	R_earth	± 0.18	Transit	NASA Exoplanet Archive	Q1-Q8 KOI Table	2014
1.15	R_earth	± 0.03	Transit	NASA Exoplanet Archive	Q1-Q16 KOI Table	2014
1.15	R_earth	± 0.03	Transit	NASA Exoplanet Archive	Q1-Q17 DR24 KOI Table	2014
1.22	R_earth	± 0.1	Transit	NASA Exoplanet Archive	Rowe et al. 2014	2014

Orbital period 14 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
15.67756	d		Transit	NASA Exoplanet Archive	Weiss et al. 2024	2024
15.67755	d	± 4.82e-05	Transit	NASA Exoplanet Archive	Gajdo&scaron; et al. 2019	2019
15.67756	d	± 6.22e-05	Transit	NASA Exoplanet Archive	Fulton & Petigura 2018	2018
15.67756	d	± 6.22e-05	Transit	NASA Exoplanet Archive	Morton et al. 2016	2016
15.67771	d	± 4.52e-06	Transit	NASA Exoplanet Archive	Holczer et al. 2016	2016
15.67787	d	± 0.00013	Transit	NASA Exoplanet Archive	Van Eylen & Albrecht 2015	2015
15.6775	d	± 5.78e-05	Transit	NASA Exoplanet Archive	Q1-Q17 DR25 KOI Table	2014
15.6775	d	± 5.78e-05	Transit	NASA Exoplanet Archive	Q1-Q17 DR25 Supplemental KOI Table	2014
15.677	d		Transit	NASA Exoplanet Archive	Hadden et al. 2014	2014
15.67756	d	± 6.22e-05	Transit	NASA Exoplanet Archive	Q1-Q12 KOI Table	2014
15.67757	d	± 0.00011	Transit	NASA Exoplanet Archive	Q1-Q8 KOI Table	2014
15.67756	d	± 6.22e-05	Transit	NASA Exoplanet Archive	Q1-Q16 KOI Table	2014

Show the remaining 2

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
15.67756	d	± 6.22e-05	Transit	NASA Exoplanet Archive	Q1-Q17 DR24 KOI Table	2014
15.67756	d	± 9.60e-05	Transit	NASA Exoplanet Archive	Rowe et al. 2014	2014

Semi-major axis 8 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.1164445	au		Transit	NASA Exoplanet Archive	Weiss et al. 2024	2024
0.11646	au	± 0.00095	Transit	NASA Exoplanet Archive	Fulton & Petigura 2018	2018
0.1185	au		Transit	NASA Exoplanet Archive	Q1-Q17 DR25 KOI Table	2014
0.1194	au		Transit	NASA Exoplanet Archive	Q1-Q12 KOI Table	2014
0.117	au		Transit	NASA Exoplanet Archive	Q1-Q8 KOI Table	2014
0.1194	au		Transit	NASA Exoplanet Archive	Q1-Q16 KOI Table	2014
0.1194	au		Transit	NASA Exoplanet Archive	Q1-Q17 DR24 KOI Table	2014
0.119	au		Transit	NASA Exoplanet Archive	Rowe et al. 2014	2014

Eccentricity 7 values

Value	Uncertainty	Band / method	Source	Reference	Year
0		Transit	NASA Exoplanet Archive	Weiss et al. 2024	2024
0.03	± 0.2	Transit	NASA Exoplanet Archive	Van Eylen & Albrecht 2015	2015
0		Transit	NASA Exoplanet Archive	Q1-Q17 DR25 KOI Table	2014
0		Transit	NASA Exoplanet Archive	Q1-Q12 KOI Table	2014
0		Transit	NASA Exoplanet Archive	Q1-Q8 KOI Table	2014
0		Transit	NASA Exoplanet Archive	Q1-Q16 KOI Table	2014
0		Transit	NASA Exoplanet Archive	Q1-Q17 DR24 KOI Table	2014

Equilibrium temperature 5 values

Value	Unit	Band / method	Source	Reference	Year
810	K	Transit	NASA Exoplanet Archive	Q1-Q17 DR25 KOI Table	2014
811	K	Transit	NASA Exoplanet Archive	Q1-Q12 KOI Table	2014
822	K	Transit	NASA Exoplanet Archive	Q1-Q8 KOI Table	2014
811	K	Transit	NASA Exoplanet Archive	Q1-Q16 KOI Table	2014
811	K	Transit	NASA Exoplanet Archive	Q1-Q17 DR24 KOI Table	2014

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
Kepler-197 e	Exoplanet	0.004347″	11.78
Kepler-197 b	Exoplanet	0.004347″	11.78
Kepler-197 c	Exoplanet	0.004347″	11.78
Kepler-197	HighPM*	0.8324″	11.78
Kepler-197B	HighPM*	6.433″	11.85
2MASS J19405341+5033216	Star	14.54″	—
2MASS J19405650+5033312	Star	20.51″	—
2MASS J19410148+5032042	Star	111.8″	—
TYC 3564-2971-1	Star	177″	10.81
2MASS J19405938+5036388	Star	191.6″	—
TYC 3564-2949-1	**	197.4″	10.63

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-197-d · Registry entry updated 2026-08-14.