Kepler-1590 b
Astrophysical Synthesis & Habitability Characterization
Kepler-1590 b is a confirmed terrestrial exoplanet orbiting the star Kepler-1590, located approximately 2515.2 light-years (771.15 parsecs) from the Solar System. First announced in 2016 by Kepler using the Transit detection technique (producing an estimated primary transit depth of 0.0081% across the stellar disk), this world measures 1.14 Earth radii and has a measured mass of 1.55 Earth masses. Combining its mass and radius yields a mean bulk density of 5.77 g/cm³ (a terrestrial silicate-iron composition comparable to Earth (5.51 g/cm³)), a surface gravity of 1.19 g⊕ (11.67 m/s²), and an escape velocity of 13 km/s.
In its orbital architecture around Kepler-1590, Kepler-1590 b completes one full revolution every 7.618 Earth days at a semi-major axis of 0.07116 AU (orbiting interior to Mercury's 0.387 AU benchmark in the Solar System). Its mean orbital velocity is approximately 101.6 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 1020 K (+747°C / +1377°F) and receiving 171.48 S⊕ (~233,382 W/m²), Kepler-1590 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star Kepler-1590 is classified as a stellar host with an effective photospheric temperature of 6,053 K, a radius of 1.16 R☉, a mass of 1.11 M☉, an estimated bolometric luminosity of 1.621 L☉. Stellar evolution modeling indicates an estimated stellar age of 3.39 Gyr and a metallicity of [Fe/H] = 0.03 dex (near-solar heavy-element abundance). From Earth, Kepler-1590 shines at apparent V-band magnitude 14.186 (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-1590 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 6,053 K |
| Stellar Radius | 1.1600 R☉ |
| Stellar Mass | 1.1100 M☉ |
| Bolometric Luminosity | 1.621 L☉ |
| Metallicity [Fe/H] | 0.030 dex |
| Stellar Age | 3.390 Gyr |
| Apparent Magnitude | V: 14.186 · G: 14.077 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | 0.071160 AU |
| Orbital Period | 7.618 days |
| Mean Orbital Velocity | 101.6 km/s |
| Orbital Eccentricity (e) | 0.00000 |
| Orbital Inclination (i) | 89.1700° |
| Mean Bulk Density | 5.77 g/cm³ (13 km/s vesc) |
| Insolation Flux | 171.4780 S⊕ (~233,382 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 2515.200 LY (771.152 pc) |