Key parameters at a glance
- A radius of 16.81 Earth radii
- A mass of 254.26 Earth masses
- Surface gravity around 0.90 g
- An orbital period of 2.144 days
- Semi-major axis 0.0344 AU
- Equilibrium temperature 2,035 K (1762 °C)
- Distance from Earth 1,481.22 light-years
- Earth Similarity Index 0.053
- Travel time at Voyager 1 speed 26,121,276 years
WASP-48 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#116of 1771
top 6.5%
This planet
16.81R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-48 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 16.81 | 11.21 |
| Mass (M⊕) | 1.00 | 254.26 | 317.83 |
| Density (g/cm³) | 5.51 | 0.42 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.90 | 2.53 |
| Insolation (S⊕) | 1.00 | 3,410.26 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 254.264 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 284475976
Gaia DR2
Gaia DR2 2141754578242371584
Gaia DR3
Gaia DR3 2141754578242371584
System
WASP-48
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.14 Earth days (0.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0344 AU.
Transit Fingerprint
Depth
0.960 %
Duration
3.154 h
Impact parameter b
0.638
Rp / R★
0.095840
Transit midpoint (BJD)
2,456,176.9899
Photometric dip
Transit produces a flux drop of 9,600 ppm lasting ≈ 3.15 h.
Extended Orbital Architecture
Planet / star radius ratio
0.095840
Semi-major axis / stellar radius
4.250
Impact parameter (b)
0.638
RV semi-amplitude (K)
136.000 m/s
Transit mid-time (BJD)
2,456,176.9899
Angular separation (arcsec)
0.07580
Eq. Temperature
2,035K
(1762 °C)
Insolation (S⊕)
3,410.26
Earth = 1.00
Earth Similarity (ESI)
0.053
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
Enoch et al. 2011Instrument
iKon-L CCD Camera
Publication
2011-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2011 at SuperWASP (8 shown).
Host System: WASP-48
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,920 K — hotter than the Sun (5,778 K)
Estimated Age
7.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.580 R☉
Stellar Mass
0.880 M☉
Metallicity [Fe/H]
-0.12
Extended Stellar Properties
Surface gravity (log g)
4.030 dex
Stellar density
0.320 g/cm³
Systemic radial velocity
-19.68 km/s
Rotational v·sin i
12.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.173 mas
Total Proper Motion
28.635 mas/yr
PM Right Ascension
6.14 mas/yr
PM Declination
-27.97 mas/yr
Galactic Cartesian (pc)
x = 0.205 · y = -0.529 · z = 0.824
Equatorial (J2000)
RA 291.16239° · Dec 55.47303°
Galactic ℓ, b
86.882° · 17.627°
Ecliptic λ, β
322.455° · 75.045°
HTM-20 index
1864203597
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