Key parameters at a glance
- A radius of 1.56 Earth radii
- A mass of 3.05 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 0.649 days
- Equilibrium temperature 1,311 K (1038 °C)
- Distance from Earth 301.24 light-years
- Earth Similarity Index 0.218
- Travel time at Voyager 1 speed 5,312,349 years
- Almost certainly tidally locked to its host star given the close orbit
TOI-5736 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#636of 1176
top 54.0%
This planet
1.56R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | TOI-5736 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.56 | 11.21 |
| Mass (M⊕) | 1.00 | 3.05 | 317.83 |
| Density (g/cm³) | 5.51 | 4.41 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 493.48 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 310380289
Gaia DR2
Gaia DR2 1508499824114581504
Gaia DR3
Gaia DR3 1508499824114581504
System
TOI-5736
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 15.6 hours long.
Transit Fingerprint
Depth
0.062 %
Duration
1.135 h
Impact parameter b
0.435
Rp / R★
0.024700
Transit midpoint (BJD)
2,458,738.8968
Photometric dip
Transit produces a flux drop of 616 ppm lasting ≈ 1.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024700
Semi-major axis / stellar radius
4.530
Impact parameter (b)
0.435
Transit mid-time (BJD)
2,458,738.8968
Eq. Temperature
1,311K
(1038 °C)
Insolation (S⊕)
493.48
Earth = 1.00
Earth Similarity (ESI)
0.218
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Gomez Barrientos et al. 2025Instrument
TESS CCD Array
Publication
2025-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-5736
Spectral Class
K-type orange
Effective Temperature
3,949 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.580 R☉
Stellar Mass
0.570 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
4.669 dex
Stellar density
4.136 g/cm³
Systemic radial velocity
-1.76 km/s
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
10.798 mas
Total Proper Motion
89.336 mas/yr
PM Right Ascension
-33.28 mas/yr
PM Declination
-82.91 mas/yr
Galactic Cartesian (pc)
x = -0.540 · y = -0.361 · z = 0.760
Equatorial (J2000)
RA 213.75840° · Dec 49.50094°
Galactic ℓ, b
92.861° · 62.462°
Ecliptic λ, β
183.031° · 57.269°
HTM-20 index
-890451646
Similar Worlds
Kepler-1317 b
Super-Earth · K-type orange
Radius 1.56 R⊕ · 2,375.4 ly
Kepler-190 b
Super-Earth · K-type orange
Radius 1.56 R⊕ · 1,413.5 ly
TOI-238 b
Super-Earth · K-type orange
Radius 1.56 R⊕ · 262.7 ly
K2-383 b
Super-Earth · K-type orange
Radius 1.56 R⊕ · 664.7 ly
K2-136 d
Super-Earth · K-type orange
Radius 1.57 R⊕ · 193.2 ly
K2-165 c
Super-Earth · K-type orange
Radius 1.55 R⊕ · 439.0 ly