Key parameters at a glance
- A radius of 12.44 Earth radii
- A mass of 117.60 Earth masses
- Surface gravity around 0.76 g
- An orbital period of 2.782 days
- Semi-major axis 0.0379 AU
- Equilibrium temperature 1,400 K (1127 °C)
- Distance from Earth 634.55 light-years
- Earth Similarity Index 0.081
- Travel time at Voyager 1 speed 11,190,223 years
WASP-49 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1287of 1771
top 72.6%
This planet
12.44R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-49 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.44 | 11.21 |
| Mass (M⊕) | 1.00 | 117.60 | 317.83 |
| Density (g/cm³) | 5.51 | 0.29 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.76 | 2.53 |
| Insolation (S⊕) | 1.00 | 615.47 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 117.597 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 306362738
Gaia DR2
Gaia DR2 2991284369063612928
Gaia DR3
Gaia DR3 2991284369063612928
System
WASP-49
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.78 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0379 AU.
Transit Fingerprint
Depth
1.400 %
Duration
2.140 h
Impact parameter b
0.770
Rp / R★
0.116000
Transit midpoint (BJD)
2,457,377.5969
Photometric dip
Transit produces a flux drop of 14,000 ppm lasting ≈ 2.14 h.
Extended Orbital Architecture
Planet / star radius ratio
0.116000
Semi-major axis / stellar radius
8.370
Impact parameter (b)
0.770
RV semi-amplitude (K)
56.800 m/s
Transit mid-time (BJD)
2,457,377.5969
Long. of periastron (ω)
90.00°
Sky-projected obliquity (λ)
54.00°
Angular separation (arcsec)
0.19500
Eq. Temperature
1,400K
(1127 °C)
Insolation (S⊕)
615.47
Earth = 1.00
Earth Similarity (ESI)
0.081
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
Lendl et al. 2012Instrument
iKon-L CCD Camera
Publication
2012-08
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at SuperWASP (12 shown).
Host System: WASP-49
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,600 K — cooler than the Sun (5,778 K)
Estimated Age
11.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.970 R☉
Stellar Mass
0.920 M☉
Metallicity [Fe/H]
-0.23
Extended Stellar Properties
Surface gravity (log g)
4.500 dex
Stellar density
1.430 g/cm³
Systemic radial velocity
41.73 km/s
Rotational v·sin i
0.90 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.111 mas
Total Proper Motion
57.991 mas/yr
PM Right Ascension
54.77 mas/yr
PM Declination
-19.06 mas/yr
Galactic Cartesian (pc)
x = -0.018 · y = 0.956 · z = -0.292
Equatorial (J2000)
RA 91.08972° · Dec -16.96539°
Galactic ℓ, b
223.265° · -17.860°
Ecliptic λ, β
91.365° · -40.399°
HTM-20 index
-1954472979
Observation Record
Transmission spectra
1
Emission spectra
2
Archive notes
1
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