Registry · exoplanet

HAT-P-17 b

Exoplanet 103 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: 21h 38m 08.63s
Declination: +30° 29′ 17.5″
Galactic l, b: 80.851, -16.18
Magnitude V: 10.38
Distance: 92.383 pc

Also known as

1 identifiers

HAT-P-17b

Planet

NASA Exoplanet Archive, composite parameters

Host star	HAT-P-17 · G0
Discovery	Transit, 2012 · HATNet
Orbital period	10.3385 d
Semi-major axis	0.0892 au
Eccentricity	0.35
Radius	11.769 R⊕ · 1.05 R♃
Mass	184.34 M⊕ · 0.58 M♃
Density	0.44 g/cm³
Equilibrium temperature	800 K
System distance	92.383 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 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
177.3483	M_earth	± 5.721	Transit	NASA Exoplanet Archive	Mancini et al. 2022	2022
171.6273	M_earth	± 6.357	Transit	NASA Exoplanet Archive	Borsato et al. 2021	2021
170.6747	M_earth	± 5.403	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
184.3414	M_earth	± 19.07	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
184.3414	M_earth	± 6.039	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
169.71	M_earth	± 5.72	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

Radius 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
11.37712	R_earth	± 0.4596	Transit	NASA Exoplanet Archive	Mancini et al. 2022	2022
11.65734	R_earth	± 0.2242	Transit	NASA Exoplanet Archive	Borsato et al. 2021	2021
11.32109	R_earth	± 0.3251	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
11.76945	R_earth	± 0.4484	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
11.8729	R_earth	± 0.618	Transit	NASA Exoplanet Archive	ExoFOP	2012
11.321	R_earth	± 0.325	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

Orbital period 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
10.33854	d	± 7.00e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
10.33854	d	± 1.00e-06	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
10.33854	d	± 6.00e-07	Transit	NASA Exoplanet Archive	Mancini et al. 2022	2022
10.33853	d	± 9.00e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2022	2022
10.33852	d	± 9.00e-06	Transit	NASA Exoplanet Archive	Borsato et al. 2021	2021
10.33852	d	± 9.00e-06	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
10.33852	d	± 9.00e-06	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
10.3385	d	± 1.51e-05	Transit	NASA Exoplanet Archive	ExoFOP	2012
10.33852	d	± 9.00e-06	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

Semi-major axis 3 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.0892	au	± 0.0012	Transit	NASA Exoplanet Archive	Mancini et al. 2022	2022
0.0882	au	± 0.0013	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.0882	au	± 0.0014	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

Eccentricity 6 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.342	± 0.006	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
0.342	± 0.005	Transit	NASA Exoplanet Archive	Borsato et al. 2021	2021
0.3417	± 0.0036	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.35	± 0.01	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
0.342	± 0.0039	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
0.342	± 0.006	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

Equilibrium temperature 3 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
800	K	± 11	Transit	NASA Exoplanet Archive	Mancini et al. 2022	2022
903	K		Transit	NASA Exoplanet Archive	ExoFOP	2012
792	K	± 15	Transit	NASA Exoplanet Archive	Howard et al. 2012	2012

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
HAT-P-17 c	Exoplanet	0″	10.38
HAT-P-17	HighPM*	2.329″	10.38
ATO J324.5370+30.5582	RRLyrae	252.4″	—
GALEX J213757.9+303520	WhiteDwarf	388.5″	—
LP 342-4	**	407.5″	12.02
GALEX J213829.4+302150	WhiteDwarf	521.7″	—

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/hat-p-17-b · Registry entry updated 2026-08-14.