CONFIRMED EXOPLANET
·
Sub-Neptune
TOI-426 b
Orbits Host Star: TOI-426
(Type G2 V)
· Distance: 370.500 Light-Years (113.590 pc)
Planetary Radius
2.190 R⊕
Planetary Mass
6.700 M⊕
Surface Gravity
1.4 g / g⊕
Equilibrium Temp
1790K (+1517°C / +2763°F)
Orbital Period
1.321 days
Discovery Year
2026 (Transit)
Earth Similarity (ESI)
0.14 / 1.00
Insolation Flux
1,711.00 S⊕
Habitability & Planetary Characterization
⚠️ Thermal Exclusions: High equilibrium temperature (1790 K · +1517°C / +2763°F) places this world well interior to the runaway greenhouse threshold.
Earth Similarity Index (ESI): 0.14
Earth Baseline = 1.00
0.00 Dissimilar
0.50 Mars Scale
0.70 Analog Regime
1.00 Earth
Methodology: Computed using the Schulze-Makuch et al. (2011) weighted metric comparing physical interior (radius, estimated density) and surface thermal regime (escape velocity, equilibrium temperature).
Discovery Facility: Transiting Exoplanet Survey Satellite (TESS).
☀️ Host Star Telemetry
| Host Star Name | TOI-426 |
| Spectral Type | G2 V |
| Effective Temp (Teff) | 5,750 K |
| Stellar Radius | 0.9900 R☉ |
| Stellar Mass | 1.0000 M☉ |
| Metallicity [Fe/H] | 0.160 dex |
| Stellar Age | 1.570 Gyr |
| Apparent Magnitude | V: 10.116 · G: 10.041 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital Dynamics
| Semi-Major Axis (a) | 0.023740 AU |
| Orbital Period | 1.321 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.0000° |
| Insolation Flux | 1711.0000 S⊕ |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 370.500 LY (113.590 pc) |
Other Worlds in the TOI-426 System (1)
NASA EXOPLANET ARCHIVE COMPOSITE PARAMETERS