Key parameters at a glance
- A radius of 17.13 Earth radii
- A mass of 473.55 Earth masses
- Surface gravity around 1.61 g
- An orbital period of 0.926 days
- Semi-major axis 0.0199 AU
- Equilibrium temperature 2,508 K (2235 °C)
- Distance from Earth 1,225.20 light-years
- Earth Similarity Index 0.042
- Travel time at Voyager 1 speed 21,606,317 years
WASP-103 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#106of 1771
top 5.9%
This planet
17.13R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-103 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 17.13 | 11.21 |
| Mass (M⊕) | 1.00 | 473.55 | 317.83 |
| Density (g/cm³) | 5.51 | 0.55 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.61 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 473.547 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 276754403
Gaia DR2
Gaia DR2 4439085988769170432
Gaia DR3
Gaia DR3 4439085988769170432
System
WASP-103
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 22.2 hours long on a nearly circular orbit at a mean orbital distance of 0.0198 AU.
Transit Fingerprint
Depth
1.195 %
Duration
2.593 h
Impact parameter b
0.190
Rp / R★
0.109300
Transit midpoint (BJD)
2,456,459.5996
Photometric dip
Transit produces a flux drop of 11,950 ppm lasting ≈ 2.59 h.
Extended Orbital Architecture
Planet / star radius ratio
0.109300
Semi-major axis / stellar radius
2.978
Impact parameter (b)
0.190
RV semi-amplitude (K)
271.000 m/s
Transit mid-time (BJD)
2,456,459.5996
Sky-projected obliquity (λ)
3.00°
Angular separation (arcsec)
0.05280
Eq. Temperature
2,508K
(2235 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.042
0 = alien, 1 = Earth-identical
Insufficient insolation data — 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
Gillon et al. 2014Instrument
iKon-L CCD Camera
Publication
2014-02
Observation locale
Ground
Discovery cohort
Planets confirmed in 2014 at SuperWASP (12 shown).
Host System: WASP-103
Spectral Class
F-type yellow-white
Effective Temperature
6,110 K — hotter than the Sun (5,778 K)
Estimated Age
4.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.436 R☉
Stellar Mass
1.220 M☉
Metallicity [Fe/H]
0.06
Extended Stellar Properties
Surface gravity (log g)
4.220 dex
Stellar density
0.583 g/cm³
Systemic radial velocity
-42.00 km/s
Rotational v·sin i
10.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
1.137 mas
Total Proper Motion
9.279 mas/yr
PM Right Ascension
-8.85 mas/yr
PM Declination
2.77 mas/yr
Galactic Cartesian (pc)
x = -0.350 · y = -0.928 · z = 0.125
Equatorial (J2000)
RA 249.31486° · Dec 7.18338°
Galactic ℓ, b
23.410° · 33.022°
Ecliptic λ, β
246.388° · 28.943°
HTM-20 index
1424431952
Observation Record
Transmission spectra
5
Emission spectra
9
Archive notes
1
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