ZTF J1230-2655 b
Astrophysical Synthesis & Habitability Characterization
ZTF J1230-2655 b is a confirmed gas giant exoplanet orbiting the star ZTF J1230-2655, located approximately 608.9 light-years (186.69 parsecs) from the Solar System. First announced in 2025 by Zwicky Transient Facility using the Transit detection technique (producing an estimated primary transit depth of 10560.1703% across the stellar disk), this world measures 13.787 Earth radii (1.23 Jupiter radii) and has a measured mass of 7024.008 Earth masses (22.1 Jupiter masses). Combining its mass and radius yields a mean bulk density of 14.78 g/cm³ (an iron-enriched, high-compression rocky core), a surface gravity of 36.95 g⊕ (362.36 m/s²), and an escape velocity of 252.5 km/s.
In its orbital architecture around ZTF J1230-2655, ZTF J1230-2655 b completes one full revolution every 0.236 Earth days.
⚠️ Thermal Regime (Irradiated / Hot Zone): At an equilibrium temperature of 2950 K (+2677°C / +4851°F) and receiving 17,889.75 S⊕ (~24,347,943 W/m²), ZTF J1230-2655 b orbits interior to the runaway greenhouse boundary where surface liquid water cannot persist.
The host star ZTF J1230-2655 is classified as a stellar host with an effective photospheric temperature of 10,000 K, a radius of 0.0123 R☉, a mass of 0.646 M☉, an estimated bolometric luminosity of 0.00136 L☉. From Earth, ZTF J1230-2655 shines at apparent V-band magnitude 18.912 (faint and requiring research-grade or CCD telescopic photometry) in the Southern 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: Zwicky Transient Facility · Catalogue Source: NASA Exoplanet Archive (IPAC / Caltech).
☀️ Host Star Telemetry
| Host Star Name | ZTF J1230-2655 |
| Spectral Type | Unclassified |
| Effective Temp (Teff) | 10,000 K |
| Stellar Radius | 0.0123 R☉ |
| Stellar Mass | 0.6460 M☉ |
| Bolometric Luminosity | 0.00136 L☉ |
| Metallicity [Fe/H] | — |
| Stellar Age | — |
| Apparent Magnitude | V: 18.912 · G: 18.887 |
| System Architecture | 1 Star, 1 Planet |
🪐 Orbital & Physical Dynamics
| Semi-Major Axis (a) | — |
| Orbital Period | 0.236 days |
| Orbital Eccentricity (e) | Circular (0.00) |
| Orbital Inclination (i) | 86.7000° |
| Mean Bulk Density | 14.78 g/cm³ (252.5 km/s vesc) |
| Insolation Flux | 17889.7450 S⊕ (~24,347,943 W/m²) |
| Habitable Zone Status | Exterior / Non-HZ |
| Celestial Distance | 608.900 LY (186.690 pc) |