Registry · exoplanet

WASP-17 b

Exoplanet

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: 15h 59m 50.94s
Declination: −28° 03′ 42.5″
Galactic l, b: 345.96, 18.67
Magnitude V: 11.59
Distance: 405.91 pc

Planet

NASA Exoplanet Archive, composite parameters

Host star	WASP-17 · F4
Discovery	Transit, 2009 · SuperWASP
Orbital period	3.73543 d
Semi-major axis	0.0515 au
Eccentricity	0
Radius	20.961 R⊕ · 1.87 R♃
Mass	247.91 M⊕ · 0.78 M♃
Density	0.082 g/cm³
Equilibrium temperature	1,755 K
System distance	405.91 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 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
247.9074	M_earth	± 73.1	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
162.729	M_earth	± 11.76	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
162.0933	M_earth		Transit	NASA Exoplanet Archive	Sing et al. 2016	2016
154.4654	M_earth	± 10.17	Transit	NASA Exoplanet Archive	Sedaghati et al. 2016	2016
168.1321	M_earth	± 14.94	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
151.6049	M_earth	± 10.49	Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
154.4654	M_earth	± 10.17	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
143.977	M_earth	± 13.67	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
156	M_earth	± 19	Transit	NASA Exoplanet Archive	Anderson et al. 2010	2010

Radius 10 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
19.16736	R_earth		Transit	NASA Exoplanet Archive	Panek et al. 2023	2023
20.96083	R_earth	± 2.69	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
22.31712	R_earth	± 0.9079	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
21.18501	R_earth		Transit	NASA Exoplanet Archive	Sing et al. 2016	2016
19.58212	R_earth	± 0.8743	Transit	NASA Exoplanet Archive	Sedaghati et al. 2016	2016
21.65579	R_earth	± 0.5941	Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
22.31712	R_earth	± 0.9079	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
22.26107	R_earth	± 0.9976	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
19.5	R_earth	± 2.9	Transit	NASA Exoplanet Archive	Anderson et al. 2010	2010
21.2315	R_earth	± 1.196	Transit	NASA Exoplanet Archive	ExoFOP	2009

Orbital period 13 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
3.735485	d	± 2.60e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
3.735485	d		Transit	NASA Exoplanet Archive	Grant et al. 2023	2023
3.73543	d	± 7.10e-06	Transit	NASA Exoplanet Archive	Patel & Espinoza 2022	2022
3.735483	d	± 1.50e-06	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
3.73543	d	± 8.00e-06	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
3.735485	d	± 1.90e-06	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
3.73	d		Transit	NASA Exoplanet Archive	Sing et al. 2016	2016
3.735438	d		Transit	NASA Exoplanet Archive	Sedaghati et al. 2016	2016
3.735485	d	± 1.90e-06	Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
3.735438	d	± 6.80e-06	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
3.735433	d	± 7.60e-06	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
3.735442	d	± 7.20e-06	Transit	NASA Exoplanet Archive	Anderson et al. 2010	2010

Show the remaining 1

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
3.735484	d	± 2.10e-06	Transit	NASA Exoplanet Archive	ExoFOP	2009

Semi-major axis 6 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.05151	au	± 0.00035	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.0513	au	± 0.0029	Transit	NASA Exoplanet Archive	Sedaghati et al. 2016	2016
0.05125	au	± 0.00103	Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
0.0515	au	± 0.00034	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
0.05	au	± 0.0017	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
0.051	au	± 0.0017	Transit	NASA Exoplanet Archive	Anderson et al. 2010	2010

Eccentricity 8 values

Value	Uncertainty	Band / method	Source	Reference	Year
0		Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
0.02		Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0		Transit	NASA Exoplanet Archive	Sedaghati et al. 2016	2016
0.039	± 0.05	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
0		Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
0.028	± 0.015	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
0.11		Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
0.129	± 0.106	Transit	NASA Exoplanet Archive	Anderson et al. 2010	2010

Equilibrium temperature 5 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1,738	K		Transit	NASA Exoplanet Archive	Barstow et al. 2017	2017
1,740	K		Transit	NASA Exoplanet Archive	Sing et al. 2016	2016
1,755	K	± 28	Transit	NASA Exoplanet Archive	Southworth et al. 2012	2012
1,771	K	± 35	Transit	NASA Exoplanet Archive	Anderson et al. 2011	2011
1,670	K		Transit	NASA Exoplanet Archive	ExoFOP	2009

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
WASP-17	Star	0″	—
CD-27 10695	Star	0.194″	11.59
CD-27 10695b	Planet	0.194″	—
CRTS J155924.5-280241	RRLyrae	356.6″	15.72
CRTS J155921.5-280138	Type2Cep	409.4″	14.18

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