Key parameters at a glance
- A radius of 12.00 Earth radii
- A mass of 85.30 Earth masses
- Surface gravity around 0.59 g
- An orbital period of 3.439 days
- Semi-major axis 0.0385 AU
- Equilibrium temperature 759 K (486 °C)
- Distance from Earth 590.80 light-years
- Earth Similarity Index 0.159
- Travel time at Voyager 1 speed 10,418,682 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-3757 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1494of 1771
top 84.3%
This planet
12.00R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-3757 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.00 | 11.21 |
| Mass (M⊕) | 1.00 | 85.30 | 317.83 |
| Density (g/cm³) | 5.51 | 0.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.59 | 2.53 |
| Insolation (S⊕) | 1.00 | 55.40 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 85.300 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 445751830
Gaia DR2
Gaia DR2 996878131494639488
Gaia DR3
Gaia DR3 996878131494639488
System
TOI-3757
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.44 Earth days (0.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0384 AU.
Transit Fingerprint
Depth
3.291 %
Duration
1.920 h
Rp / R★
0.176900
Transit midpoint (BJD)
2,458,838.7715
Photometric dip
Transit produces a flux drop of 32,914 ppm lasting ≈ 1.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.176900
Semi-major axis / stellar radius
13.260
RV semi-amplitude (K)
49.240 m/s
Transit mid-time (BJD)
2,458,838.7715
Long. of periastron (ω)
130.00°
Angular separation (arcsec)
0.21200
Eq. Temperature
759K
(486 °C)
Insolation (S⊕)
55.40
Earth = 1.00
Earth Similarity (ESI)
0.159
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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
Kanodia et al. 2022Instrument
TESS CCD Array
Publication
2022-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-3757
Spectral Class
M-type red dwarf
Effective Temperature
3,913 K — cooler than the Sun (5,778 K)
Estimated Age
7.10 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.620 R☉
Stellar Mass
0.640 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.680 dex
Stellar density
3.700 g/cm³
Systemic radial velocity
21.86 km/s
Rotational v·sin i
2.00 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
5.492 mas
Total Proper Motion
44.090 mas/yr
PM Right Ascension
-9.04 mas/yr
PM Declination
-43.15 mas/yr
Galactic Cartesian (pc)
x = -0.010 · y = 0.573 · z = 0.819
Equatorial (J2000)
RA 91.00364° · Dec 55.01998°
Galactic ℓ, b
158.558° · 15.592°
Ecliptic λ, β
90.672° · 31.583°
HTM-20 index
991324886
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