TIC 270471727 b
Astrophysical Synthesis & Habitability Characterization
TIC 270471727 b is a confirmed sub-neptune exoplanet orbiting the star TIC 270471727, located approximately 593.9 light-years (182.1 parsecs) from the Solar System. First announced in 2026 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.0639% across the stellar disk), this world measures 2.75 Earth radii and has a measured mass of 8 Earth masses. Combining its mass and radius yields a mean bulk density of 2.12 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.06 g⊕ (10.4 m/s²), and an escape velocity of 19.1 km/s.
In its orbital architecture around TIC 270471727, TIC 270471727 b completes one full revolution every 10.456 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1147 K (+874°C / +1605°F) and receiving 283.98 S⊕ (~386,495 W/m²), TIC 270471727 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TIC 270471727 is classified as a stellar host with an effective photospheric temperature of 5,271 K, a radius of 0.9971 R☉, a mass of 0.9 M☉, an estimated bolometric luminosity of 0.689 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.09 dex (near-solar heavy-element abundance). From Earth, TIC 270471727 shines at apparent V-band magnitude 11.948 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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 | TIC 270471727 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,271 K |
| Stellar Radius | 0.9971 R☉ |
| Stellar Mass | 0.9000 M☉ |
| Bolometric Luminosity | 0.689 L☉ |
| Metallicity [Fe/H] | -0.090 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 11.948 · G: 11.703 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 10.456 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 88.8109° |
| Mean Bulk Density | 2.12 g/cm³ (19.1 km/s vesc) |
| Insolation Flux | 283.9789 S⊕ (~386,495 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 593.900 LY (182.104 pc) |