Kepler-1834 c
Astrophysical Synthesis & Habitability Characterization
Kepler-1834 c is a confirmed terrestrial exoplanet orbiting the star Kepler-1834, located approximately 1632.1 light-years (500.4 parsecs) from the Solar System. First announced in 2023 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0201% across the stellar disk), this world measures 1.22 Earth radii and has a measured mass of 1.98 Earth masses. Combining its mass and radius yields a mean bulk density of 6.01 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.33 g⊕ (13.04 m/s²), and an escape velocity of 14.3 km/s.
In its orbital architecture around Kepler-1834, Kepler-1834 c completes one full revolution every 0.767 Earth days at a semi-major axis of 0.015 AU (an ultra-close orbit less than one-seventh of Mercury's 0.387 AU distance from the Sun, where strong stellar tidal forces typically induce synchronous rotation). Its mean orbital velocity is approximately 212.8 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 1541 K (+1268°C / +2314°F) and receiving 1,334.22 S⊕ (~1,815,873 W/m²), Kepler-1834 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1834 is classified as a stellar host with an effective photospheric temperature of 4,821 K, a radius of 0.788 R☉, a mass of 0.765 M☉, an estimated bolometric luminosity of 0.301 L☉. Stellar evolution modeling indicates an estimated stellar age of 12.2 Gyr and a metallicity of [Fe/H] = 0.16 dex (metal-rich relative to the Sun). From Earth, Kepler-1834 shines at apparent V-band magnitude 15.18 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-1834 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-1834 c sharing its stellar neighborhood alongside Kepler-1834 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: Kepler · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | Kepler-1834 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,821 K |
| Stellar Radius | 0.7880 R☉ |
| Stellar Mass | 0.7650 M☉ |
| Bolometric Luminosity | 0.301 L☉ |
| Metallicity [Fe/H] | 0.160 dex |
| Stellar Age | 12.200 Gyr |
| Apparent Magnitude | V: 15.180 · G: 14.905 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.015000 AU |
| Orbital Period | 0.767 days |
| Mean Orbital Velocity | 212.8 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 84.9400° |
| Mean Bulk Density | 6.01 g/cm³ (14.3 km/s vesc) |
| Insolation Flux | 1334.2200 S⊕ (~1,815,873 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1632.100 LY (500.395 pc) |