Key parameters at a glance
- A radius of 13.00 Earth radii
- A mass of 572.07 Earth masses
- Surface gravity around 3.38 g
- An orbital period of 3.577 days
- Semi-major axis 0.0446 AU
- Equilibrium temperature 1,233 K (959 °C)
- Distance from Earth 1,281.11 light-years
- Earth Similarity Index 0.124
- Travel time at Voyager 1 speed 22,592,399 years
WASP-37 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#959of 1771
top 54.1%
This planet
13.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-37 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.00 | 11.21 |
| Mass (M⊕) | 1.00 | 572.07 | 317.83 |
| Density (g/cm³) | 5.51 | 1.53 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.38 | 2.53 |
| Insolation (S⊕) | 1.00 | 545.33 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 572.070 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 368805700
Gaia DR2
Gaia DR2 3652176997218325888
Gaia DR3
Gaia DR3 3652176997218325888
System
WASP-37
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.58 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0446 AU.
Transit Fingerprint
Depth
1.427 %
Duration
3.130 h
Rp / R★
0.119500
Transit midpoint (BJD)
2,455,338.6188
Photometric dip
Transit produces a flux drop of 14,270 ppm lasting ≈ 3.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.119500
Semi-major axis / stellar radius
9.600
RV semi-amplitude (K)
241.000 m/s
Transit mid-time (BJD)
2,455,338.6188
Angular separation (arcsec)
0.11400
Eq. Temperature
1,233K
(959 °C)
Insolation (S⊕)
545.33
Earth = 1.00
Earth Similarity (ESI)
0.124
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
Simpson et al. 2010Instrument
iKon-L CCD Camera
Publication
2011-01
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at SuperWASP (12 shown).
Host System: WASP-37
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,800 K — hotter than the Sun (5,778 K)
Estimated Age
11.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.003 R☉
Stellar Mass
0.925 M☉
Metallicity [Fe/H]
-0.40
Extended Stellar Properties
Surface gravity (log g)
4.250 dex
Stellar density
1.237 g/cm³
Systemic radial velocity
13.03 km/s
Rotational v·sin i
2.40 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.518 mas
Total Proper Motion
33.365 mas/yr
PM Right Ascension
-28.08 mas/yr
PM Declination
18.02 mas/yr
Galactic Cartesian (pc)
x = -0.744 · y = -0.668 · z = 0.019
Equatorial (J2000)
RA 221.94389° · Dec 1.06502°
Galactic ℓ, b
354.774° · 51.823°
Ecliptic λ, β
219.160° · 16.432°
HTM-20 index
-540281747
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