Kepler-1016 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1016 b is a confirmed sub-neptune exoplanet orbiting the star Kepler-1016, located approximately 4575.4 light-years (1402.82 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0399% across the stellar disk), this world measures 2.18 Earth radii and has a measured mass of 5.39 Earth masses. Combining its mass and radius yields a mean bulk density of 2.87 g/cm³ (an intermediate density indicative of a deep water-ice mantle or dense volatile envelope), a surface gravity of 1.13 g⊕ (11.08 m/s²), and an escape velocity of 17.6 km/s.
In its orbital architecture around Kepler-1016, Kepler-1016 b completes one full revolution every 1.955 Earth days at a semi-major axis of 0.03044 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 169.4 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.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 1540 K (+1267°C / +2313°F) and receiving 1,445.20 S⊕ (~1,966,923 W/m²), Kepler-1016 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1016 is classified as a stellar host with an effective photospheric temperature of 5,821 K, a radius of 1 R☉, a mass of 0.99 M☉, an estimated bolometric luminosity of 1.03 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.89 Gyr and a metallicity of [Fe/H] = -0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1016 shines at apparent V-band magnitude 15.531 (faint and requiring research-grade or CCD telescopic photometry) in the Northern celestial hemisphere. The Kepler-1016 system is a multi-planet architecture hosting 2 confirmed worlds, with Kepler-1016 b sharing its stellar neighborhood alongside Kepler-1016 c.
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-1016 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 5,821 K |
| Stellar Radius | 1.0000 R☉ |
| Stellar Mass | 0.9900 M☉ |
| Bolometric Luminosity | 1.03 L☉ |
| Metallicity [Fe/H] | -0.030 dex |
| Stellar Age | 3.890 Gyr |
| Apparent Magnitude | V: 15.531 · G: 15.319 |
| System Architecture | 1 Star, 2 Planets |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.030440 AU |
| Orbital Period | 1.955 days |
| Mean Orbital Velocity | 169.4 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 82.9800° |
| Mean Bulk Density | 2.87 g/cm³ (17.6 km/s vesc) |
| Insolation Flux | 1445.2040 S⊕ (~1,966,923 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 4575.400 LY (1402.820 pc) |