Count the expected number of passes for a transit.
Transiting body
Estimated transit duration
Expected number of exact passes (1, 3, or 5)
Fast planets (Sun, Moon, Mercury, Venus, Mars) typically have 1 pass. Slow planets (Jupiter through Pluto) may have 3 passes if the transit spans a retrograde period. Very slow planets or very long transits can have 5 passes.
Count the expected number of passes for a transit.