Kepler-1455 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1455 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1455, located approximately 1166.4 light-years (357.62 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.1089% across the stellar disk), this world measures 2.16 Earth radii and has a measured mass of 5.31 Earth masses. Combining its mass and radius yields a mean bulk density of 2.91 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.14 g⊕ (11.18 m/s²), and an escape velocity of 17.5 km/s.
In its orbital architecture around Kepler-1455, Kepler-1455 b completes one full revolution every 49.277 Earth days at a semi-major axis of 0.2149 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 47.4 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.
✓ Classified as a Temperate Habitable Zone Candidate.
With an estimated equilibrium temperature of 298 K (+25°C / +77°F) and an incident stellar irradiance of 1.53 S⊕ (~2,086 W/m²), Kepler-1455 b orbits within the empirical circumstellar habitable zone where a rocky surface under sufficient atmospheric pressure can maintain liquid surface water.
The host star Kepler-1455 is classified as a stellar host with an effective photospheric temperature of 4,075 K, a radius of 0.6 R☉, a mass of 0.62 M☉, an estimated bolometric luminosity of 0.089 L☉. Stellar evolution modeling indicates an estimated stellar age of 4.17 Gyr and a metallicity of [Fe/H] = -0.02 dex (near-solar heavy-element abundance). From Earth, Kepler-1455 shines at apparent V-band magnitude 16.06 (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-1455 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 4,075 K |
| Stellar Radius | 0.6000 R☉ |
| Stellar Mass | 0.6200 M☉ |
| Bolometric Luminosity | 0.089 L☉ |
| Metallicity [Fe/H] | -0.020 dex |
| Stellar Age | 4.170 Gyr |
| Apparent Magnitude | V: 16.060 · G: 15.866 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.214900 AU |
| Orbital Period | 49.277 days |
| Mean Orbital Velocity | 47.4 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.6930° |
| Mean Bulk Density | 2.91 g/cm³ (17.5 km/s vesc) |
| Insolation Flux | 1.5330 S⊕ (~2,086 W/m²) |
| Habitable Zone Status | ★ Temperate Zone |
| Celestial Distance | 1166.400 LY (357.621 pc) |