Key parameters at a glance
- A radius of 15.86 Earth radii
- A mass of 366.77 Earth masses
- Surface gravity around 1.46 g
- An orbital period of 0.789 days
- Semi-major axis 0.0165 AU
- Equilibrium temperature 2,113 K (1840 °C)
- Distance from Earth 875.16 light-years
- Earth Similarity Index 0.052
- Travel time at Voyager 1 speed 15,433,412 years
WASP-19 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#172of 1771
top 9.7%
This planet
15.86R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-19 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.86 | 11.21 |
| Mass (M⊕) | 1.00 | 366.77 | 317.83 |
| Density (g/cm³) | 5.51 | 0.51 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.46 | 2.53 |
| Insolation (S⊕) | 1.00 | 3,320.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 366.774 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 360.100 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 35516889
Gaia DR2
Gaia DR2 5411736896952029568
Gaia DR3
Gaia DR3 5411736896952029568
System
WASP-19
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 18.9 hours long on a nearly circular orbit at a mean orbital distance of 0.0165 AU.
Transit Fingerprint
Depth
2.077 %
Duration
1.607 h
Impact parameter b
0.667
Rp / R★
0.144100
Transit midpoint (BJD)
2,456,402.7128
Photometric dip
Transit produces a flux drop of 20,770 ppm lasting ≈ 1.61 h.
Extended Orbital Architecture
Planet / star radius ratio
0.144100
Semi-major axis / stellar radius
3.533
Impact parameter (b)
0.667
RV semi-amplitude (K)
255.400 m/s
Occultation depth
0.048 ppm
Transit mid-time (BJD)
2,456,402.7128
Long. of periastron (ω)
51.00°
Sky-projected obliquity (λ)
1.00°
Angular separation (arcsec)
0.06160
Eq. Temperature
2,113K
(1840 °C)
Insolation (S⊕)
3,320.00
Earth = 1.00
Earth Similarity (ESI)
0.052
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Hebb et al. 2010Instrument
iKon-L CCD Camera
Publication
2010-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at SuperWASP (6 shown).
Host System: WASP-19
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,616 K — cooler than the Sun (5,778 K)
Estimated Age
6.40 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.006 R☉
Stellar Mass
0.965 M☉
Metallicity [Fe/H]
0.04
Extended Stellar Properties
Surface gravity (log g)
4.417 dex
Stellar density
1.339 g/cm³
Systemic radial velocity
20.79 km/s
Rotational v·sin i
4.63 km/s
Rotation period
10.50 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.698 mas
Total Proper Motion
39.402 mas/yr
PM Right Ascension
-35.41 mas/yr
PM Declination
17.29 mas/yr
Galactic Cartesian (pc)
x = -0.595 · y = 0.366 · z = -0.715
Equatorial (J2000)
RA 148.41677° · Dec -45.65911°
Galactic ℓ, b
273.405° · 6.776°
Ecliptic λ, β
175.066° · -53.301°
HTM-20 index
-1431587118
Observation Record
Photometric series
1
RV measurements
1
Transmission spectra
16
Emission spectra
17
Archive notes
1
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