WASP-20 Overview

WASP-20 1.24 R_⦿ 5873.53 K

WASP-20 b

1.380 R_Jup

WASP-20 B 5235.00 K

Overview Notes 3 Parameters Nearby Data Bibliography 14 Legend Expand All

WASP-20 Architecture & Discovery Information

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
WASP-20
WASP-20 b	---	15.47 R_⨁	Transit	2015	Anderson et al. 2015	Confirmed Planet
WASP-20 B

Exoplanet Archive Notes (3)

WASP-20

This reference contains discussion regarding the stellar multiplicity of this system. (Evans et al. 2016)
This reference contains discussion regarding the stellar multiplicity of this system. (Bohn et al. 2020)
This reference contains discussion regarding the stellar multiplicity of this system. (Southworth et al. 2020)

WASP-20 Stellar Parameters (7 Solutions)

RA: 00h20m38.53s

Dec: -23d56m08.84s

Distance: 211.877 pc

Parallax: ---

Ecliptic Latitude: -23.88712 deg

Ecliptic Longitude: 354.60193 deg

Galactic Latitude: -82.35676 deg

Galactic Longitude: 55.91524 deg

Total Proper Motion: 18.3534738±1.9000000 mas/yr

Proper Motion (RA): -1.4±1.9 mas/yr

Proper Motion (Dec): -18.3±1.9 mas/yr

Photometry: m_V
10.675±0.007; m_TESS
10.2480±0.0062; m_J
9.701±0.021; m_H
9.417±0.021; m_Ks
9.390±0.024; m_W1
9.328±0.022; m_W2
9.364±0.019; m_W3
9.324±0.033; m_W4
8.336; m_Gaia
10.650300±0.000727; m_B
11.203±0.104

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; TOI; Stellar Hosts

Source	Alexoudi 2022	TICv8	Gaia DR2	Bonomo et al. 2017	Evans et al. 2016	Anderson et al. 2015	ExoFOP
R_✶ (R_⦿)	1.242±0.044	1.5037	---	1.392±0.044	1.142±0.085	1.392±0.044	1.5
T_eff (K)	---	5775.7	5873.533+377.850-209.233	5940±100	---	5940±100	5940
Metallicity (dex)	---	0.040±0.100 [M/H]	---	-0.0080±0.0600 [Fe/H]	---	-0.008±0.060 [Fe/H]	---
v sin i (km/s)	---	---	---	4.75±0.51	---	4.75±0.51	---
Age (Gyr)	---	---	---	7.0+2.0-1.0	3.6+2.1-3.6	7 +2-1	---
M_✶ (M_⦿)	---	---	---	1.200±0.041	1.089±0.050	1.200±0.041	---
ρ_✶ (g/cm³)	---	---	---	---	1.03±0.24	0.630±0.046	---
log g (log₁₀(cm/s²))	---	---	---	---	4.360±0.066	4.231±0.020	4.23158
γ (km/s)	---	---	---	---	---	1.316300±0.000089	---
Sp. T	---	---	---	---	---	F9	---

WASP-20 b Planetary Parameters (8 Solutions)

Status: Confirmed Planet

Detected By: Radial Velocity, Transit

Tools: Planetary Systems; Transit Prediction Service; TOI; Transit; NExoList: JWST

Source	Alexoudi 2022	Kokori et al. 2023	Ivshina & Winn 2022	Kokori et al. 2022	Bonomo et al. 2017	Evans et al. 2016	Anderson et al. 2015	ExoFOP
S (S_⨁)	---	---	---	---	---	---	---	259.864
P (days)	---	4.89964477±0.00000051	4.89964485±0.00000055	4.8996461±0.0000016	4.8996284±0.0000033	---	4.8996284±0.0000033	4.8996461±0.0000010
R_p (R_⨁)	15.5±0.4	---	---	---	16.39±0.66	14.3±1.7	16.388±0.661	15.9746
R_p (R_Jup)	1.38±0.04	---	---	---	1.462±0.059	1.28±0.15	1.462±0.059	1.42516
δ (%)	---	---	---	---	---	---	1.164±0.023	1.0957000±0.0115235
T₁₄ (hours)	---	---	---	---	---	---	3.4032±0.0336	3.070±0.031
T_C (days)	2455715.66591±0.00034 (BJD-TDB)	2458087.08446±0.00013 (BJD-TDB)	2458356.56496±0.00015 (BJD-TDB)	2456367.3093±0.0004 (BJD-TDB)	2455715.65640±0.00029 (BJD-TDB)	---	2455715.65562±0.00029	2460198.8317160±0.0002599 (BJD)
a/R_✶	9.50±0.17	10.60±0.08	---	---	---	10.94+0.88-0.76	9.28±0.23	---
i (deg)	85.82±0.16	86.8±0.9	---	---	85.56±0.22	87.46±0.88	85.56±0.22	---
R_p/R_✶	0.09963±0.00047	0.101±0.005	---	---	---	0.1148±0.0057	---	---
M_p (M_⨁)	---	---	---	---	98.8+6.0-5.7	120±7	98.841±5.403	---
M_p (M_Jup)	---	---	---	---	0.311+0.019-0.018	0.378±0.022	0.311±0.017	---
e	---	---	---	---	<0.039	---	0	---
ρ (g/cm³)	0.156±0.016	---	---	---	0.123+0.018-0.015	0.225±0.086	0.132±0.016	---
K (m/s)	---	---	---	---	32.9±1.8	---	32.8±1.7	---
a (au)	---	---	---	---	0.05999+0.00069-0.00068	0.0581±0.0009	0.06000±0.00069	---
T_eq (K)	1362±26	---	---	---	---	1282±52	1379±31	---
b	0.691±0.028	---	---	---	---	---	0.718±0.018	---
λ (deg)	---	---	---	---	---	---	12.7±4.2	---

WASP-20 B Stellar Parameters (1 Solution)

RA: ---

Dec: ---

Distance: ---

Parallax: ---

Ecliptic Latitude: ---

Ecliptic Longitude: ---

Galactic Latitude: ---

Galactic Longitude: ---

Total Proper Motion: 3.965±1.790 mas/yr

Proper Motion (RA): 2.4660736491703266±1.9867580886975706 mas/yr

Proper Motion (Dec): -3.1048520862636342±1.6543573710256712 mas/yr

Photometry: m_V
---; m_TESS
---; m_J
---; m_H
---; m_Ks
---; m_W1
---; m_W2
---; m_W3
---; m_W4
---; m_Gaia
---; m_B
---

Tools: Planetary Systems; Stellar Hosts

Source	Southworth et al. 2020
T_eff (K)	5235+242-272
Age (Gyr)	4.3+1.2-1.8
M_✶ (M_⦿)	0.89+0.06-0.07

WASP-20 Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 1 Confirmed Planets; 1 2MASS Point Source Catalog

Data Files: 4 KELT Time Series; 1 Associated Literature Data

WASP-20 B Nearby Data (within 30 arcseconds) Browse Nearby Data

+

Known Objects: 1 Confirmed Planets; 1 2MASS Point Source Catalog

Data Files: 4 KELT Time Series; 1 Associated Literature Data

Bibliography (14 References)

ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
Kokori et al. 2023 Reference Overview
TESS Transit Timing of Hundreds of Hot Jupiters
Ivshina & Winn 2022 Reference Overview
On the parameter refinement of inflated exoplanets with large radius uncertainty based on TESS observations
Alexoudi 2022 Reference Overview
ExoClock Project. II. A Large-scale Integrated Study with 180 Updated Exoplanet Ephemerides
Kokori et al. 2022 Reference Overview
A multiplicity study of transiting exoplanet host stars. II. Revised properties of transiting planetary systems with companions
Southworth et al. 2020 Reference Overview
A multiplicity study of transiting exoplanet host stars. I. High-contrast imaging with VLT/SPHERE
Bohn et al. 2020 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
ExoFOP TOI Table
ExoFOP
The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
Bonomo et al. 2017 Reference Overview
WASP-20 Is a Close Visual Binary with a Transiting Hot Jupiter
Evans et al. 2016 Reference Overview
WASP-20b and WASP-28b: a hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars
Anderson et al. 2015 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview

System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
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Transit Prediction Service
Time Series
Kepler | K2

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