Kepler-1144 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1144 b is a confirmed super-earth exoplanet orbiting the star Kepler-1144, located approximately 3720 light-years (1140.57 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0361% across the stellar disk), this world measures 1.99 Earth radii and has a measured mass of 4.62 Earth masses. Combining its mass and radius yields a mean bulk density of 3.23 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.17 g⊕ (11.47 m/s²), and an escape velocity of 17 km/s.
In its orbital architecture around Kepler-1144, Kepler-1144 b completes one full revolution every 17.146 Earth days at a semi-major axis of 0.1291 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 81.9 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 811 K (+538°C / +1000°F) and receiving 62.06 S⊕ (~84,465 W/m²), Kepler-1144 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1144 is classified as a stellar host with an effective photospheric temperature of 5,753 K, a radius of 0.96 R☉, a mass of 0.98 M☉, an estimated bolometric luminosity of 0.906 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.98 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1144 shines at apparent V-band magnitude 14.943 (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-1144 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,753 K |
| Stellar Radius | 0.9600 R☉ |
| Stellar Mass | 0.9800 M☉ |
| Bolometric Luminosity | 0.906 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 3.980 Gyr |
| Apparent Magnitude | V: 14.943 · G: 14.913 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.129100 AU |
| Orbital Period | 17.146 days |
| Mean Orbital Velocity | 81.9 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 86.2500° |
| Mean Bulk Density | 3.23 g/cm³ (17 km/s vesc) |
| Insolation Flux | 62.0610 S⊕ (~84,465 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 3720.000 LY (1140.570 pc) |