Kepler-1468 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1468 b is a confirmed super-earth exoplanet orbiting the star Kepler-1468, located approximately 6194.5 light-years (1899.24 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0228% across the stellar disk), this world measures 1.73 Earth radii and has a measured mass of 3.64 Earth masses. Combining its mass and radius yields a mean bulk density of 3.88 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.22 g⊕ (11.96 m/s²), and an escape velocity of 16.2 km/s.
In its orbital architecture around Kepler-1468, Kepler-1468 b completes one full revolution every 8.24 Earth days at a semi-major axis of 0.0817 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 107.9 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 1093 K (+820°C / +1508°F) and receiving 481.35 S⊕ (~655,120 W/m²), Kepler-1468 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1468 is classified as a stellar host with an effective photospheric temperature of 5,893 K, a radius of 1.05 R☉, a mass of 1.04 M☉, an estimated bolometric luminosity of 1.193 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.55 Gyr and a metallicity of [Fe/H] = 0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1468 shines at apparent V-band magnitude 15.111 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-1468 system is a multi-planet architecture hosting 3 confirmed worlds, with Kepler-1468 b sharing its stellar neighborhood alongside Kepler-1468 c, Kepler-1468 d.
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-1468 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,893 K |
| Stellar Radius | 1.0500 R☉ |
| Stellar Mass | 1.0400 M☉ |
| Bolometric Luminosity | 1.193 L☉ |
| Metallicity [Fe/H] | 0.030 dex |
| Stellar Age | 3.550 Gyr |
| Apparent Magnitude | V: 15.111 · G: 14.952 |
| System Architecture | 1 Star, 3 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.081700 AU |
| Orbital Period | 8.24 days |
| Mean Orbital Velocity | 107.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.9400° |
| Mean Bulk Density | 3.88 g/cm³ (16.2 km/s vesc) |
| Insolation Flux | 481.3520 S⊕ (~655,120 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 6194.500 LY (1899.240 pc) |