Confirmed exoplanet · Database record + computed analysis
GJ 896 A b
A confirmed world orbiting GJ 896 A, 20.4 light-years away.
A gas giant
13.30 Earth radii, Jupiter-class (Jupiter is 11.2). At only 718.3 Earth masses for that size, it must be substantially gas or volatile ices: puffy, not rocky.
The orbit
Its year takes 284 Earth days (0.8 Earth years). The orbit is strongly stretched (eccentricity 0.35), so its distance from the star, and with it the climate, swings dramatically.
Temperature and starlight
Its equilibrium temperature (the airless-world estimate) is about -146 °C. It receives only 0.04 times Earth's starlight.
Its sun
Its star is a red dwarf (3,345 K surface), type M3.5 V: small, dim, flare-prone, and destined to outlive the Sun many times over. The system holds 2 stars, so its skies have more than one sun.
How far is that, really?
At 20 light-years, tonight's light from this system left it around the year 2005. That is close by galactic standards, which makes it a prime target for follow-up telescopes. A Voyager-speed probe would need roughly 361,249 years to get there.
How we found it
It was found by astrometry, which measures the star's tiny sideways drift across the sky. The discovery was announced in 2022 from Very Long Baseline Array.
Everything above is computed from the archive’s measured values for this planet. Where a quantity is missing, the statement is omitted rather than guessed.
About this record
The measured values come from the NASA Exoplanet Archive, and any missing value has not been determined yet; the Atlas never fills gaps with guesses. More standout worlds: Proxima b, TRAPPIST-1e, K2-18 b, 55 Cancri e, and the detection methods that found them all.