TOI-2285 b
Astrophysical Synthesis & Habitability Characterization
TOI-2285 b is a confirmed super-earth exoplanet orbiting the star TOI-2285, located approximately 138.3 light-years (42.41 parsecs) from the Solar System. First announced in 2021 by Transiting Exoplanet Survey Satellite (TESS) using the Transit detection technique (producing an estimated primary transit depth of 0.1223% across the stellar disk), this world measures 1.77 Earth radii and has a measured mass of 19.5 Earth masses. Combining its mass and radius yields a mean bulk density of 19.39 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 6.22 g⊕ (61 m/s²), and an escape velocity of 37.1 km/s.
In its orbital architecture around TOI-2285, TOI-2285 b completes one full revolution every 13.635 Earth days at a semi-major axis of 0.1363 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 108.7 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.3, swinging from 0.0954 AU at periapsis out to 0.1772 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 358 K (+85°C / +185°F) and receiving 3.91 S⊕ (~5,322 W/m²), TOI-2285 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star TOI-2285 is classified as a stellar host with an effective photospheric temperature of 3,491 K, a radius of 0.464 R☉, a mass of 0.454 M☉, an estimated bolometric luminosity of 0.029 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = -0.05 dex (near-solar heavy-element abundance). From Earth, TOI-2285 shines at apparent V-band magnitude 13.403 (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-2285 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 3,491 K |
| Stellar Radius | 0.4640 R☉ |
| Stellar Mass | 0.4540 M☉ |
| Bolometric Luminosity | 0.029 L☉ |
| Metallicity [Fe/H] | -0.050 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 13.403 · G: 12.431 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.136300 AU |
| Orbital Period | 13.635 days |
| Mean Orbital Velocity | 108.7 km/s |
| Orbital Eccentricity (e) | 0.30000 |
| Orbital Inclination (i) | 89.6600° |
| Mean Bulk Density | 19.39 g/cm³ (37.1 km/s vesc) |
| Insolation Flux | 3.9100 S⊕ (~5,322 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 138.300 LY (42.409 pc) |