A particularly close encounter between Comet Swift–Tuttle and Earth is predicted for 3044.
Long-term orbital calculations forecast that Swift–Tuttle will pass about 0.011 astronomical units from Earth during a close encounter around 3044. That distance is roughly 1.6 million kilometres, making it a notable astronomical approach even though it is not an expected impact.
The comet is also predicted to pass Earth at larger distances during future returns, including its 2126 and 2261 approaches. Early concerns about a possible future collision were reduced after historical observations and modern orbit calculations produced a more stable long-term trajectory.
A close approach does not mean the comet will strike Earth. Small differences in a comet’s orbit can accumulate over many revolutions, so predictions far into the future carry uncertainty. The 3044 encounter is a dynamical forecast, not a forecast of danger to the 2026 Perseid shower.