[astro-ph.IM] Gaia Data Release 4 (DR4) provides epoch astrometry from which thousands of giant planets and many substellar and stellar companions can be characterised.
![Injection–recovery calibration (173 runs). Left: fraction of truths inside the central credible interval against its level, per parameter; calibrated posteriors follow the diagonal, within the grey 95% binomial range. Right: posterior quantile of the true period against the true period in units of the baseline (1733–1902 d), coloured by the total signal-to-noise ratio S; dashed lines bound the 95% interval. For true periods just below one baseline the posterior tends to lie above the truth (points near q = 0): such periods tend to be overestimated, while q near 1 means it is underestimated.-- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/11/ExoPlanetLab.png?resize=1200%2C719&ssl=1)
[astro-ph.IM] Gaia Data Release 4 (DR4) provides epoch astrometry from which thousands of giant planets and many substellar and stellar companions can be characterised.