Key parameters at a glance
- A radius of 13.67 Earth radii
- A mass of 394.11 Earth masses
- Surface gravity around 2.11 g
- An orbital period of 3.119 days
- Semi-major axis 0.0415 AU
- Equilibrium temperature 1,389 K (1116 °C)
- Distance from Earth 633.18 light-years
- Earth Similarity Index 0.089
- Travel time at Voyager 1 speed 11,166,123 years
WASP-16 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#596of 1771
top 33.6%
This planet
13.67R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-16 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.67 | 11.21 |
| Mass (M⊕) | 1.00 | 394.11 | 317.83 |
| Density (g/cm³) | 5.51 | 0.57 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 481.92 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 394.109 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 46096489
Gaia DR2
Gaia DR2 6283723285046532864
Gaia DR3
Gaia DR3 6283723285046532864
System
WASP-16
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.12 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0415 AU.
Transit Fingerprint
Depth
1.200 %
Duration
2.043 h
Impact parameter b
0.810
Rp / R★
0.107900
Transit midpoint (BJD)
2,456,355.7965
Photometric dip
Transit produces a flux drop of 12,000 ppm lasting ≈ 2.04 h.
Extended Orbital Architecture
Planet / star radius ratio
0.107900
Semi-major axis / stellar radius
9.520
Impact parameter (b)
0.810
RV semi-amplitude (K)
116.700 m/s
Transit mid-time (BJD)
2,456,355.7965
Long. of periastron (ω)
97.00°
Sky-projected obliquity (λ)
11.00°
Angular separation (arcsec)
0.21400
Eq. Temperature
1,389K
(1116 °C)
Insolation (S⊕)
481.92
Earth = 1.00
Earth Similarity (ESI)
0.089
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
Lister et al. 2009Instrument
iKon-L CCD Camera
Publication
2009-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at SuperWASP (6 shown).
Host System: WASP-16
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,700 K — cooler than the Sun (5,778 K)
Estimated Age
8.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.140 R☉
Stellar Mass
1.780 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.490 dex
Stellar density
1.680 g/cm³
Systemic radial velocity
-1.94 km/s
Rotational v·sin i
3.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
5.123 mas
Total Proper Motion
17.257 mas/yr
PM Right Ascension
-0.04 mas/yr
PM Declination
17.26 mas/yr
Galactic Cartesian (pc)
x = -0.771 · y = -0.534 · z = -0.347
Equatorial (J2000)
RA 214.68301° · Dec -20.27544°
Galactic ℓ, b
329.235° · 38.097°
Ecliptic λ, β
219.128° · -6.063°
HTM-20 index
-924623331
Observation Record
Photometric series
1
RV measurements
1
Emission spectra
2
Archive notes
1
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