TOI-2537 c
Astrophysical Synthesis & Habitability Characterization
TOI-2537 c is a confirmed gas giant exoplanet orbiting the star TOI-2537, located approximately 603.3 light-years (184.99 parsecs) from the Solar System. First announced in 2024 by Multiple Observatories using the Radial Velocity detection technique (measuring periodic Doppler reflex motion in the host star's spectrum), this world measures 12.7 Earth radii (1.13 Jupiter radii) and has a measured mass of 2297.899 Earth masses (7.23 Jupiter masses). Combining its mass and radius yields a mean bulk density of 6.19 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 14.25 g⊕ (139.74 m/s²), and an escape velocity of 150.5 km/s.
In its orbital architecture around TOI-2537, TOI-2537 c completes one full revolution every 1920 Earth days (5.26Julian years) at a semi-major axis of 2.78 AU (corresponding to the middle-system regime between Mars at 1.52 AU and Jupiter at 5.20 AU). Its mean orbital velocity is approximately 15.8 km/s (compared to Earth's 29.8 km/s). The planet follows a highly eccentric trajectory (e = 0.287, swinging from 1.9821 AU at periapsis out to 3.5779 AU at apoapsis), pointing to past dynamical scattering or secular gravitational perturbations.
❄️ Thermal Regime (Cryogenic Zone): With an equilibrium temperature of 123 K (-150°C / -238°F) and an incident flux of 0.04 S⊕ (~53 W/m²), surface water and volatile species on TOI-2537 c would remain locked in cryogenic ice phases unless warmed by subsurface tidal or radiogenic heating.
The host star TOI-2537 is classified as a stellar host with an effective photospheric temperature of 4,870 K, a radius of 0.771 R☉, a mass of 0.771 M☉, an estimated bolometric luminosity of 0.3 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.1 Gyr and a metallicity of [Fe/H] = 0.08 dex (metal-rich relative to the Sun). From Earth, TOI-2537 shines at apparent V-band magnitude 13.236 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The TOI-2537 system is a multi-planet architecture hosting 2 confirmed worlds, with TOI-2537 c sharing its stellar neighborhood alongside TOI-2537 b.
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: Multiple Observatories · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | TOI-2537 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,870 K |
| Stellar Radius | 0.7710 R☉ |
| Stellar Mass | 0.7710 M☉ |
| Bolometric Luminosity | 0.3 L☉ |
| Metallicity [Fe/H] | 0.080 dex |
| Stellar Age | 1.100 Gyr |
| Apparent Magnitude | V: 13.236 · G: 12.730 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 2.780000 AU |
| Orbital Period | 1920 days |
| Mean Orbital Velocity | 15.8 km/s |
| Orbital Eccentricity (e) | 0.28700 |
| Orbital Inclination (i) | — |
| Mean Bulk Density | 6.19 g/cm³ (150.5 km/s vesc) |
| Insolation Flux | 0.0389 S⊕ (~53 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 603.300 LY (184.986 pc) |