Kepler-1754 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1754 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1754, located approximately 2344.9 light-years (718.95 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0897% across the stellar disk), this world measures 2.44 Earth radii and has a measured mass of 6.53 Earth masses. Combining its mass and radius yields a mean bulk density of 2.48 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.1 g⊕ (10.79 m/s²), and an escape velocity of 18.3 km/s.
In its orbital architecture around Kepler-1754, Kepler-1754 b completes one full revolution every 8.196 Earth days at a semi-major axis of 0.0718 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 95.3 km/s (compared to Earth's 29.8 km/s). The orbit is modeled as circular (e = 0.00), maintaining a constant stellar distance throughout its year.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 672 K (+399°C / +750°F) and receiving 48.20 S⊕ (~65,600 W/m²), Kepler-1754 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1754 is classified as a stellar host with an effective photospheric temperature of 4,723 K, a radius of 0.747 R☉, a mass of 0.734 M☉, an estimated bolometric luminosity of 0.249 L☉. Stellar evolution modeling indicates a metallicity of [Fe/H] = 0.08 dex (metal-rich relative to the Sun). From Earth, Kepler-1754 shines at apparent V-band magnitude 16.007 (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: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Kepler-1754 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,723 K |
| Stellar Radius | 0.7470 R☉ |
| Stellar Mass | 0.7340 M☉ |
| Bolometric Luminosity | 0.249 L☉ |
| Metallicity [Fe/H] | 0.080 dex |
| Stellar Age | — |
| Apparent Magnitude | V: 16.007 · G: 15.858 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.071800 AU |
| Orbital Period | 8.196 days |
| Mean Orbital Velocity | 95.3 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.3400° |
| Mean Bulk Density | 2.48 g/cm³ (18.3 km/s vesc) |
| Insolation Flux | 48.2000 S⊕ (~65,600 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2344.900 LY (718.945 pc) |