TOI-2274 b
Astrophysical Synthesis & Habitability Characterization
TOI-2274 b is a confirmed sub-neptune exoplanet orbiting the star TOI-2274, located approximately 159.4 light-years (48.88 parsecs) from the Solar System. First announced in 2024 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1267% across the stellar disk), this world measures 2.45 Earth radii and has a measured mass of 6.57 Earth masses. Combining its mass and radius yields a mean bulk density of 2.46 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.09 g⊕ (10.69 m/s²), and an escape velocity of 18.3 km/s.
In its orbital architecture around TOI-2274, TOI-2274 b completes one full revolution every 2.68 Earth days at a semi-major axis of 0.05 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 203 km/s (compared to Earth's 29.8 km/s).
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 771 K (+498°C / +928°F) and receiving 83.71 S⊕ (~113,926 W/m²), TOI-2274 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2274 is classified as a low-mass red dwarf of spectral type M with an effective photospheric temperature of 3,943 K, a radius of 0.631 R☉, a mass of 0.612 M☉, an estimated bolometric luminosity of 0.086 L☉. From Earth, TOI-2274 shines at apparent V-band magnitude 11.995 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere.
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) · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-2274 |
| Spectral Type | M |
| Effective Temp (Teff) | 3,943 K |
| Stellar Radius | 0.6310 R☉ |
| Stellar Mass | 0.6120 M☉ |
| Bolometric Luminosity | 0.086 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 11.995 · G: 11.272 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.050000 AU |
| Orbital Period | 2.68 days |
| Mean Orbital Velocity | 203 km/s |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 87.3700° |
| Mean Bulk Density | 2.46 g/cm³ (18.3 km/s vesc) |
| Insolation Flux | 83.7078 S⊕ (~113,926 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 159.400 LY (48.876 pc) |