Kepler-1841 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1841 b is a confirmed super-earth exoplanet orbiting the star Kepler-1841, located approximately 2060.3 light-years (631.7 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0231% across the stellar disk), this world measures 1.489 Earth radii and has a measured mass of 2.82 Earth masses. Combining its mass and radius yields a mean bulk density of 4.71 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.27 g⊕ (12.45 m/s²), and an escape velocity of 15.4 km/s.
In its orbital architecture around Kepler-1841, Kepler-1841 b completes one full revolution every 25.886 Earth days at a semi-major axis of 0.1606 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 67.5 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 542 K (+269°C / +516°F) and receiving 20.35 S⊕ (~27,696 W/m²), Kepler-1841 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1841 is classified as a stellar host with an effective photospheric temperature of 5,190 K, a radius of 0.899 R☉, a mass of 0.823 M☉, an estimated bolometric luminosity of 0.526 L☉. Stellar evolution modeling indicates an estimated stellar age of 11.6 Gyr and a metallicity of [Fe/H] = 0.12 dex (metal-rich relative to the Sun). From Earth, Kepler-1841 shines at apparent V-band magnitude 14.855 (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-1841 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,190 K |
| Stellar Radius | 0.8990 R☉ |
| Stellar Mass | 0.8230 M☉ |
| Bolometric Luminosity | 0.526 L☉ |
| Metallicity [Fe/H] | 0.120 dex |
| Stellar Age | 11.600 Gyr |
| Apparent Magnitude | V: 14.855 · G: 14.527 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.160600 AU |
| Orbital Period | 25.886 days |
| Mean Orbital Velocity | 67.5 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 87.1600° |
| Mean Bulk Density | 4.71 g/cm³ (15.4 km/s vesc) |
| Insolation Flux | 20.3500 S⊕ (~27,696 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2060.300 LY (631.700 pc) |