Kepler-341 d
Astrophysical Synthesis & Habitability Characterization
Kepler-341 d is a confirmed super-earth exoplanet orbiting the star Kepler-341, located approximately 3415 light-years (1047.03 parsecs) from the Solar System. First announced in 2014 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0274% across the stellar disk), this world measures 1.85 Earth radii and has a measured mass of 4.08 Earth masses. Combining its mass and radius yields a mean bulk density of 3.55 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.19 g⊕ (11.67 m/s²), and an escape velocity of 16.6 km/s.
In its orbital architecture around Kepler-341, Kepler-341 d completes one full revolution every 27.666 Earth days at a semi-major axis of 0.182 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 71.6 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 622 K (+349°C / +660°F) and receiving 45.42 S⊕ (~61,821 W/m²), Kepler-341 d orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-341 is classified as a stellar host with an effective photospheric temperature of 6,012 K, a radius of 1.024 R☉, a mass of 0.976 M☉, an estimated bolometric luminosity of 1.229 L☉. Stellar evolution modeling indicates an estimated stellar age of 9.12 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-341 shines at apparent V-band magnitude 14.739 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-341 system is a multi-planet architecture hosting 4 confirmed worlds, with Kepler-341 d sharing its stellar neighborhood alongside Kepler-341 b, Kepler-341 c, Kepler-341 e.
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-341 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,012 K |
| Stellar Radius | 1.0240 R☉ |
| Stellar Mass | 0.9760 M☉ |
| Bolometric Luminosity | 1.229 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 9.120 Gyr |
| Apparent Magnitude | V: 14.739 · G: 14.567 |
| System Architecture | 1 Star, 4 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.182000 AU |
| Orbital Period | 27.666 days |
| Mean Orbital Velocity | 71.6 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.9800° |
| Mean Bulk Density | 3.55 g/cm³ (16.6 km/s vesc) |
| Insolation Flux | 45.4230 S⊕ (~61,821 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3415.000 LY (1047.030 pc) |