Key parameters at a glance
- A radius of 1.17 Earth radii
- A mass of 2.32 Earth masses
- Surface gravity around 1.69 g
- An orbital period of 4.314 days
- Equilibrium temperature 944 K (671 °C)
- Distance from Earth 256.82 light-years
- Earth Similarity Index 0.312
- Travel time at Voyager 1 speed 4,529,023 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around TOI-1453
TOI-1453 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-1453 b this | Rocky Terrestrial | 1.17 | 2.32 | 4.314 | 944 | 2025 |
| TOI-1453 c | Sub-Neptune | 2.22 | 2.95 | 6.589 | 820 | 2025 |
TOI-1453 b Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#134of 570
top 23.3%
This planet
1.17R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | TOI-1453 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.17 | 11.21 |
| Mass (M⊕) | 1.00 | 2.32 | 317.83 |
| Density (g/cm³) | 5.51 | 8.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.69 | 2.53 |
| Insolation (S⊕) | 1.00 | 132.60 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2.320 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 198390247
Gaia DR2
Gaia DR2 1433062331332673792
Gaia DR3
Gaia DR3 1433062331332673792
System
TOI-1453
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.31 Earth days (1.2% of a terrestrial year) on a nearly circular orbit.
Transit Fingerprint
Depth
0.027 %
Duration
1.998 h
Impact parameter b
0.569
Rp / R★
0.014960
Transit midpoint (BJD)
2,459,392.9001
Photometric dip
Transit produces a flux drop of 274 ppm lasting ≈ 2.00 h.
Extended Orbital Architecture
Planet / star radius ratio
0.014960
Semi-major axis / stellar radius
13.880
Impact parameter (b)
0.569
RV semi-amplitude (K)
0.610 m/s
Transit mid-time (BJD)
2,459,392.9001
Long. of periastron (ω)
90.00°
Eq. Temperature
944K
(671 °C)
Insolation (S⊕)
132.60
Earth = 1.00
Earth Similarity (ESI)
0.312
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.
Discovery Paper
Primary reference
Stalport et al. 2025Instrument
TESS CCD Array
Publication
2025-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2025 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1453
Spectral Class
K-type orange
Effective Temperature
4,975 K — cooler than the Sun (5,778 K)
Estimated Age
12.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.720 R☉
Stellar Mass
0.715 M☉
Metallicity [Fe/H]
-0.31
Extended Stellar Properties
Surface gravity (log g)
4.576 dex
Stellar density
2.721 g/cm³
Rotational v·sin i
2.00 km/s
Activity index (log R'HK)
-4.910
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
12.671 mas
Total Proper Motion
71.005 mas/yr
PM Right Ascension
-71.01 mas/yr
PM Declination
-0.02 mas/yr
Galactic Cartesian (pc)
x = -0.111 · y = -0.530 · z = 0.841
Equatorial (J2000)
RA 258.22327° · Dec 57.19778°
Galactic ℓ, b
85.576° · 35.751°
Ecliptic λ, β
234.003° · 79.156°
HTM-20 index
330081385
Similar Worlds
Kepler-1902 b
Rocky Terrestrial · K-type orange
Radius 1.18 R⊕ · 1,123.1 ly
Kepler-332 b
Rocky Terrestrial · K-type orange
Radius 1.17 R⊕ · 1,122.6 ly
Kepler-1694 b
Rocky Terrestrial · K-type orange
Radius 1.18 R⊕ · 1,674.3 ly
Kepler-332 d
Rocky Terrestrial · K-type orange
Radius 1.18 R⊕ · 1,122.6 ly
Kepler-1477 b
Rocky Terrestrial · K-type orange
Radius 1.18 R⊕ · 2,220.6 ly
Kepler-847 b
Rocky Terrestrial · K-type orange
Radius 1.18 R⊕ · 1,673.5 ly