Key parameters at a glance
- A radius of 15.92 Earth radii
- A mass of 772.33 Earth masses
- Surface gravity around 3.05 g
- An orbital period of 1.847 days
- Semi-major axis 0.0315 AU
- Equilibrium temperature 2,020 K (1747 °C)
- Distance from Earth 753.95 light-years
- Earth Similarity Index 0.059
- Travel time at Voyager 1 speed 13,295,828 years
WASP-3 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#166of 1771
top 9.3%
This planet
15.92R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-3 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 15.92 | 11.21 |
| Mass (M⊕) | 1.00 | 772.33 | 317.83 |
| Density (g/cm³) | 5.51 | 0.89 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,845.30 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 772.327 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 27848472
Gaia DR2
Gaia DR2 2095108312831835648
Gaia DR3
Gaia DR3 2095108312831835648
System
WASP-3
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.85 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0315 AU.
Transit Fingerprint
Depth
1.100 %
Duration
2.788 h
Impact parameter b
0.511
Rp / R★
0.105000
Transit midpoint (BJD)
2,455,554.8332
Photometric dip
Transit produces a flux drop of 11,000 ppm lasting ≈ 2.79 h.
Extended Orbital Architecture
Planet / star radius ratio
0.105000
Semi-major axis / stellar radius
5.180
Impact parameter (b)
0.511
RV semi-amplitude (K)
290.500 m/s
Transit mid-time (BJD)
2,455,554.8332
Long. of periastron (ω)
79.00°
Sky-projected obliquity (λ)
15.00°
Angular separation (arcsec)
0.13600
Eq. Temperature
2,020K
(1747 °C)
Insolation (S⊕)
1,845.30
Earth = 1.00
Earth Similarity (ESI)
0.059
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
Pollacco et al. 2008Instrument
iKon-L CCD Camera
Publication
2008-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 2007 at SuperWASP (3 shown).
Host System: WASP-3
Spectral Class
F-type yellow-white
Effective Temperature
6,400 K — hotter than the Sun (5,778 K)
Estimated Age
2.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.440 R☉
Stellar Mass
1.620 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.250 dex
Stellar density
0.770 g/cm³
Systemic radial velocity
-5.49 km/s
Rotational v·sin i
13.40 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
4.297 mas
Total Proper Motion
22.576 mas/yr
PM Right Ascension
-6.07 mas/yr
PM Declination
-21.74 mas/yr
Galactic Cartesian (pc)
x = 0.122 · y = -0.803 · z = 0.583
Equatorial (J2000)
RA 278.63174° · Dec 35.66143°
Galactic ℓ, b
64.175° · 18.611°
Ecliptic λ, β
283.569° · 58.695°
HTM-20 index
-1124106715
Observation Record
Photometric series
32
RV measurements
3
Emission spectra
7
Archive notes
4
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