A new PACO based method to push the exoplanets detection limits and to estimate their orbital parameters simultaneously by combining multi-epoch direct imaging observations In the Spirit of Lyot J. Dallant, M. Langlois, O. Flasseur, É. Thiébaut May 4, 2022 Astronomy Orbits of exoplanets HR 8799b, c, d and e estimated by the proposed method.