Registry · exoplanet

WASP-33 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: 02h 26m 51.06s
Declination: +37° 33′ 01.6″
Galactic l, b: 143.1, -21.56
Magnitude V: 8.14
Distance: 121.94 pc

Planet

NASA Exoplanet Archive, composite parameters

Host star	WASP-33 · A
Discovery	Transit, 2010 · SuperWASP
Orbital period	1.21987 d
Semi-major axis	0.0239 au
Eccentricity	0
Radius	17.856 R⊕ · 1.593 R♃
Mass	665.22 M⊕ · 2.093 M♃
Density	0.689 g/cm³
Equilibrium temperature	2,781.7 K
System distance	121.94 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 4 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
665.2182	M_earth	± 44.18	Transit	NASA Exoplanet Archive	Chakrabarty & Sengupta 2019	2019
371.8611	M_earth	± 368.7	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
1,042.482	M_earth	± 232	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
1,303	M_earth		Transit	NASA Exoplanet Archive	Collier Cameron et al. 2010	2010

Radius 5 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
17.85594	R_earth	± 0.8295	Transit	NASA Exoplanet Archive	Chakrabarty & Sengupta 2019	2019
17.9344	R_earth	± 0.6725	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
18.81991	R_earth	± 0.213	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
18.21793	R_earth	± 0.6672	Transit	NASA Exoplanet Archive	ExoFOP	2010
16.78	R_earth	± 0.504	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2010	2010

Orbital period 8 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
1.219871	d	± 3.80e-07	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
1.21987	d	± 1.00e-06	Transit	NASA Exoplanet Archive	Chakrabarty & Sengupta 2019	2019
1.219871	d	± 1.50e-07	Transit	NASA Exoplanet Archive	Zhang et al. 2018	2018
1.21987	d	± 4.50e-07	Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
1.21987	d	± 0.00014	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
1.219868	d	± 1.10e-06	Transit	NASA Exoplanet Archive	von Essen et al. 2014	2014
1.219838	d	± 1.67e-05	Transit	NASA Exoplanet Archive	ExoFOP	2010
1.219867	d	± 1.20e-06	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2010	2010

Semi-major axis 3 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.0239	au	± 0.00063	Transit	NASA Exoplanet Archive	Chakrabarty & Sengupta 2019	2019
0.0259	au	± 0.0005	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
0.02555	au	± 0.00017	Transit	NASA Exoplanet Archive	Collier Cameron et al. 2010	2010

Eccentricity 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0			Transit	NASA Exoplanet Archive	Stassun et al. 2017	2017
0			Transit	NASA Exoplanet Archive	Turner et al. 2016	2016

Equilibrium temperature 3 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2,781.7	K	± 41.1	Transit	NASA Exoplanet Archive	Chakrabarty & Sengupta 2019	2019
2,723	K	± 37	Transit	NASA Exoplanet Archive	Turner et al. 2016	2016
2,510.79	K		Transit	NASA Exoplanet Archive	ExoFOP	2010

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
WASP-33	Star	0″	—
HD 15082	EclBin	0.1385″	8.14
HD 15082b	Planet	0.1386″	—
TYC 2831-1138-1	Star	48.83″	11.27
BD+36 488	EmLine*	247.3″	9.37
EP 250827b	Transient	419.2″	—

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-33-b · Registry entry updated 2026-08-14.