Registry · exoplanet

WASP-2 b

Exoplanet 113 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: 20h 30m 54.13s
Declination: +06° 25′ 45.6″
Galactic l, b: 50.774, -18.71
Magnitude V: 11.73
Distance: 153.24 pc

Also known as

1 identifiers

WASP-2b

Planet

NASA Exoplanet Archive, composite parameters

Host star	WASP-2 · K1.5
Discovery	Transit, 2007 · SuperWASP
Orbital period	2.15218 d
Semi-major axis	0.03144 au
Eccentricity	0.0054
Radius	12.117 R⊕ · 1.081 R♃
Mass	295.9 M⊕ · 0.931 M♃
Density	0.914 g/cm³
Equilibrium temperature	1,311 K
System distance	153.24 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 10 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
295.8997	M_earth	± 19.07	Transit	NASA Exoplanet Archive	Addison et al. 2019	2019
293.9928	M_earth	± 25.74	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
291.7679	M_earth	± 8.581	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
279.6904	M_earth	± 12.08	Transit	NASA Exoplanet Archive	Southworth 2012	2012
269.202	M_earth	± 14.3	Transit	NASA Exoplanet Archive	Southworth 2010	2010
275.2408	M_earth	± 24.16	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
269.202	M_earth	± 14.3	Transit	NASA Exoplanet Archive	Southworth et al. 2010	2010
290.484	M_earth	± 29.24	Transit	NASA Exoplanet Archive	Daemgen et al. 2009	2009
290.802	M_earth	± 28.6	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
279.68	M_earth	± 25.43	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Radius 11 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
12.11693	R_earth	± 0.4596	Transit	NASA Exoplanet Archive	Addison et al. 2019	2019
12.00484	R_earth	± 0.8967	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
11.91517	R_earth	± 0.3139	Transit	NASA Exoplanet Archive	Southworth 2012	2012
11.69099	R_earth	± 0.3699	Transit	NASA Exoplanet Archive	Southworth 2010	2010
12.07209	R_earth	± 0.6165	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
11.69099	R_earth	± 0.3587	Transit	NASA Exoplanet Archive	Southworth et al. 2010	2010
12.52	R_earth	± 0.919	Transit	NASA Exoplanet Archive	Daemgen et al. 2009	2009
12.005	R_earth	± 0.897	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
11.635	R_earth	± 0.56	Transit	NASA Exoplanet Archive	Charbonneau et al. 2007	2007
10.705	R_earth	± 3.419	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007
11.99944	R_earth	± 0.6179	Transit	NASA Exoplanet Archive	ExoFOP	2007

Orbital period 15 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.152222	d	± 1.30e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2023	2023
2.152222	d	± 1.50e-07	Transit	NASA Exoplanet Archive	Kokori et al. 2022	2022
2.152222	d	± 7.90e-07	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
2.152175	d	± 1.20e-05	Transit	NASA Exoplanet Archive	Addison et al. 2019	2019
2.152222	d	± 4.20e-07	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
2.152222	d	± 4.20e-07	Transit	NASA Exoplanet Archive	Baluev et al. 2015	2015
2.152221	d	± 3.90e-07	Transit	NASA Exoplanet Archive	Southworth 2012	2012
2.152221	d	± 3.90e-07	Transit	NASA Exoplanet Archive	Southworth 2010	2010
2.152225	d	± 1.50e-06	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
2.152221	d	± 3.90e-07	Transit	NASA Exoplanet Archive	Southworth et al. 2010	2010
2.15226	d	± 4.00e-06	Transit	NASA Exoplanet Archive	Daemgen et al. 2009	2009
2.152226	d		Transit	NASA Exoplanet Archive	Torres et al. 2008	2008

Show the remaining 3

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.152226	d		Transit	NASA Exoplanet Archive	Charbonneau et al. 2007	2007
2.152226	d	± 4.00e-06	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007
2.152163	d	± 3.98e-05	Transit	NASA Exoplanet Archive	ExoFOP	2007

Semi-major axis 9 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.03144	au	± 0.00088	Transit	NASA Exoplanet Archive	Addison et al. 2019	2019
0.0314	au	± 0.0013	Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.03092	au	± 0.0006	Transit	NASA Exoplanet Archive	Southworth 2012	2012
0.03033	au	± 0.00074	Transit	NASA Exoplanet Archive	Southworth 2010	2010
0.0307	au	± 0.0013	Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010
0.03033	au	± 0.00074	Transit	NASA Exoplanet Archive	Southworth et al. 2010	2010
0.03138	au	± 0.00142	Transit	NASA Exoplanet Archive	Daemgen et al. 2009	2009
0.03138	au	± 0.0013	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
0.0307	au	± 0.0011	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2007	2007

Eccentricity 3 values

Value	Uncertainty	Band / method	Source	Reference	Year
0.013		Transit	NASA Exoplanet Archive	Bonomo et al. 2017	2017
0.0054	± 0.009	Transit	NASA Exoplanet Archive	Knutson et al. 2014	2014
0.07		Transit	NASA Exoplanet Archive	Triaud et al. 2010	2010

Equilibrium temperature 7 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1,311	K	± 52	Transit	NASA Exoplanet Archive	Addison et al. 2019	2019
1,286	K	± 17	Transit	NASA Exoplanet Archive	Southworth 2012	2012
1,281	K	± 21	Transit	NASA Exoplanet Archive	Southworth 2010	2010
1,281	K	± 21	Transit	NASA Exoplanet Archive	Southworth et al. 2010	2010
1,300	K	± 54	Transit	NASA Exoplanet Archive	Daemgen et al. 2009	2009
1,304	K	± 54	Transit	NASA Exoplanet Archive	Torres et al. 2008	2008
1,189.67	K		Transit	NASA Exoplanet Archive	ExoFOP	2007

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
WASP-2	Variable*	0.7565″	11.98
WASP-2B	Star	0.8925″	—
V* MS Del	LongPeriodV*	411.3″	8.38
IRAS 20278+0617	LongPeriodV*	513.6″	—

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-2-b · Registry entry updated 2026-08-14.