Kepler-534 c
Astrophysical Synthesis & Habitability Characterization
Kepler-534 c is a confirmed terrestrial exoplanet orbiting the star Kepler-534, located approximately 1861.2 light-years (570.66 parsecs) from the Solar System. First announced in 2021 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0136% across the stellar disk), this world measures 1.227 Earth radii and has a measured mass of 2.02 Earth masses. Combining its mass and radius yields a mean bulk density of 6.03 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.34 g⊕ (13.14 m/s²), and an escape velocity of 14.4 km/s.
In its orbital architecture around Kepler-534, Kepler-534 c completes one full revolution every 7.379 Earth days at a semi-major axis of 0.0761 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 112.2 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 933 K (+660°C / +1220°F) and receiving 178.68 S⊕ (~243,183 W/m²), Kepler-534 c orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-534 is classified as a stellar host with an effective photospheric temperature of 5,936 K, a radius of 0.965 R☉, a mass of 1.075 M☉, an estimated bolometric luminosity of 1.037 L☉. Stellar evolution modeling indicates an estimated stellar age of 1.58 Gyr and a metallicity of [Fe/H] = 0.07 dex (metal-rich relative to the Sun). From Earth, Kepler-534 shines at apparent V-band magnitude 13.387 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-534 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-534 c sharing its stellar neighborhood alongside Kepler-534 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-534 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,936 K |
| Stellar Radius | 0.9650 R☉ |
| Stellar Mass | 1.0750 M☉ |
| Bolometric Luminosity | 1.037 L☉ |
| Metallicity [Fe/H] | 0.070 dex |
| Stellar Age | 1.580 Gyr |
| Apparent Magnitude | V: 13.387 · G: 13.231 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.076100 AU |
| Orbital Period | 7.379 days |
| Mean Orbital Velocity | 112.2 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 88.0000° |
| Mean Bulk Density | 6.03 g/cm³ (14.4 km/s vesc) |
| Insolation Flux | 178.6800 S⊕ (~243,183 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 1861.200 LY (570.659 pc) |