Registry · exoplanet

WASP-1 b

Exoplanet 135 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: 00h 20m 40.07s
Declination: +31° 59′ 23.9″
Galactic l, b: 115.37, -30.43
Magnitude V: 11.31
Distance: 393.07 pc

Also known as

1 identifiers

WASP-1b

Planet

NASA Exoplanet Archive, composite parameters

Host star	WASP-1 · F7V
Discovery	Transit, 2007 · SuperWASP
Orbital period	2.51995 d
Semi-major axis	0.03889 au
Eccentricity	0
Radius	16.623 R⊕ · 1.483 R♃
Mass	271.42 M⊕ · 0.854 M♃
Density	0.348 g/cm³
Equilibrium temperature	1,812 K
System distance	393.07 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
301.3028	M_earth	± 9.217	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
268.8842	M_earth	± 17.16	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
271.415	M_earth	± 18.12	Transit	NASA Exoplanet Archive	Maciejewski et al. 2014	2014
251.0857	M_earth	± 10.49	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
311.4734	M_earth	± 15.26	Transit	NASA Exoplanet Archive	Southworth 2012	2012
292	M_earth	± 29	Transit	NASA Exoplanet Archive	Simpson et al. 2011	2011
273.3338	M_earth	± 22.88	Transit	NASA Exoplanet Archive	Southworth 2010	2010
291.7679	M_earth	± 28.92	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
282.8687	M_earth	± 44.5	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Radius 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
16.97043	R_earth	± 0.5829	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
16.24184	R_earth	± 0.4596	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
16.623	R_earth	± 0.269	Transit	NASA Exoplanet Archive	Maciejewski et al. 2014	2014
16.73504	R_earth	± 0.6837	Transit	NASA Exoplanet Archive	Southworth 2012	2012
16.97	R_earth	± 0.58	Transit	NASA Exoplanet Archive	Simpson et al. 2011	2011
16.63416	R_earth	± 0.6613	Transit	NASA Exoplanet Archive	Southworth 2010	2010
16.97043	R_earth	± 0.5829	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
17.70019	R_earth	± 0.8912	Transit	NASA Exoplanet Archive	ExoFOP	2007
21.63337	R_earth	± 6.725	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Orbital period 12 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.519947	d	± 3.00e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
2.519946	d	± 3.90e-07	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
2.519947	d	± 2.60e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2022	2022
2.519945	d	± 5.00e-07	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
2.519945	d	± 5.60e-07	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
2.519945	d	± 5.00e-07	Transit	NASA Exoplanet Archive	Maciejewski et al. 2014	2014
2.519946	d	± 8.00e-07	Transit	NASA Exoplanet Archive	Southworth 2012	2012
2.519945	d	± 1.30e-06	Transit	NASA Exoplanet Archive	Simpson et al. 2011	2011
2.519961	d	± 1.80e-05	Transit	NASA Exoplanet Archive	Southworth 2010	2010
2.519961	d		Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
2.519915	d	± 6.52e-05	Transit	NASA Exoplanet Archive	ExoFOP	2007
2.51995	d	± 1.00e-05	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Semi-major axis 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.03958	au	± 0.00047	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.03889	au	± 0.00053	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
0.03889	au	± 0.00053	Transit	NASA Exoplanet Archive	Maciejewski et al. 2014	2014
0.0392	au	± 0.00055	Transit	NASA Exoplanet Archive	Southworth 2012	2012
0.03898	au	± 0.00038	Transit	NASA Exoplanet Archive	Southworth 2010	2010
0.03957	au	± 0.00049	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
0.0382	au	± 0.0013	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Eccentricity 6 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.013		Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0		Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
0		Transit	NASA Exoplanet Archive	Maciejewski et al. 2014	2014
0.0082	± 0.026	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
0		Transit	NASA Exoplanet Archive	Simpson et al. 2011	2011
0		Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Equilibrium temperature 5 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1,812	K	± 14	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
1,830	K	± 33	Transit	NASA Exoplanet Archive	Southworth 2012	2012
1,800	K	± 32	Transit	NASA Exoplanet Archive	Southworth 2010	2010
1,811	K	± 34	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
1,730.94	K		Transit	NASA Exoplanet Archive	ExoFOP	2007

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
WASP-1	Star	0.08897″	11.31
CRTS J002015.0+315823	EclBin	324.4″	15.43
NVSS J002050+315229	Radio	435.8″	—

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-1-b · Registry entry updated 2026-08-14.