Overview
- The confirmation appears in The Astrophysical Journal Letters, with an independent identification published in Astronomy & Astrophysics.
- HD 143811 AB b is estimated at about 5.6 Jupiter masses, roughly 13 million years old, near 1,042 K, and on an orbit of about 300 years.
- Its host stars form a spectroscopic binary with an 18-day stellar period in a system about 446 light-years away in the Sco-Cen association.
- Researchers found the planet by reanalyzing 2016–2019 Gemini Planet Imager observations and verifying co-motion against background stars.
- This is the closest directly imaged planet known around a binary, offering a rare chance to map both planetary and stellar orbits as teams plan continued monitoring.