The latest conjunction of Jupiter and Saturn occurred at an optical distance of 6 arc minutes on 21 December 2020. We re-analysed all encounters of these two planets between -1000 and +3000 CE, as the extraordinary ones (<10′) take place near the line of nodes every 400 years. An occultation of their discs did not and will not happen within the historical time span of ±5,000 years around now. When viewed from Neptune though, there will be an occultation in 2046.
@article{arxiv.2105.02553,
title = {Appulses of Jupiter and Saturn},
author = {Joachim Gripp and Emil Khalisi},
journal= {arXiv preprint arXiv:2105.02553},
year = {2021}
}