Registry · exoplanet

WASP-189 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 02m 44.82s
Declination: −03° 01′ 53.4″
Galactic l, b: 354.49, 46.28
Magnitude V: 6.598
Distance: 99.731 pc

Planet

NASA Exoplanet Archive, composite parameters

Host star	WASP-189
Discovery	Transit, 2020 · CHaracterising ExOPlanets Satellite (CHEOPS)
Orbital period	2.72403 d
Semi-major axis	0.05053 au
Eccentricity	0
Radius	18.147 R⊕ · 1.619 R♃
Mass	632.48 M⊕ · 1.99 M♃
Density	0.622 g/cm³
Equilibrium temperature	3,353 K
System distance	99.731 pc

Recorded parameters

2 quantities with a single published value

Parameter	Value	Unit	Uncertainty	As published	Source	Reference
Mass	632.4785	M_earth	± 50.85	Transit	NASA Exoplanet Archive	Lendl et al. 2020
Equilibrium temperature	3,353	K	± 27	Transit	NASA Exoplanet Archive	Lendl et al. 2020

Published measurements

4 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.

Radius 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
17.93437	R_earth	± 0.1906	Transit	NASA Exoplanet Archive	Deline et al. 2022	2022
18.14734	R_earth	± 0.2354	Transit	NASA Exoplanet Archive	Lendl et al. 2020	2020

Orbital period 3 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
2.724031	d	± 2.80e-06	Transit	NASA Exoplanet Archive	Ivshina & Winn 2022	2022
2.724035	d	± 2.20e-05	Transit	NASA Exoplanet Archive	Deline et al. 2022	2022
2.724033	d		Transit	NASA Exoplanet Archive	Lendl et al. 2020	2020

Semi-major axis 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0.0504	au	± 0.00064	Transit	NASA Exoplanet Archive	Deline et al. 2022	2022
0.05053	au	± 0.00098	Transit	NASA Exoplanet Archive	Lendl et al. 2020	2020

Eccentricity 2 values

Value	Unit	Uncertainty	Band / method	Source	Reference	Year
0			Transit	NASA Exoplanet Archive	Deline et al. 2022	2022
0			Transit	NASA Exoplanet Archive	Lendl et al. 2020	2020

In the same field

within 9 arcmin · wider search

Object	Type	Separation	V
WASP-189	Star	0″	—
HD 133112	HighPM*	0.8643″	6.618
HD 133112b	Planet	0.8643″	—
[SHM2017] J225.78494-03.01724	RRLyrae	356.6″	—

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-189-b · Registry entry updated 2026-08-14.