GJ 273 b — GJ 273 System
Cataloged by the NASA Exoplanet Archive TAP service, GJ 273 b orbits host star GJ 273 every 18.65 days at a distance of 3.786 parsecs (12.35 light-years). With a planetary radius of 1.51 R⊕, equilibrium temperature of 259 K, and habitability index of 0.91, it represents a premier target for transmission spectroscopy of water vapor, carbon dioxide, and biosignature disequilibrium gases.
Caltech / NASA Exoplanet Archive TAP Parameters
Habitable-Zone Frequently Asked Questions
How far away is exoplanet GJ 273 b from Earth?
GJ 273 b is located 3.79 parsecs (12.35 light-years) from Earth, completing one full orbit around GJ 273 every 18.65 days.
What makes GJ 273 b a primary AstroTale habitable-zone candidate?
With a radius of 1.51 R⊕ and an equilibrium temperature of 259 K, GJ 273 b achieves a 91% Earth Similarity Score—placing it inside the circumstellar zone where liquid water can persist under moderate atmospheric pressure.
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