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The total duration, shown in minutes, was calculated using the following formula:

$ T + \tau = \frac{P}{\pi}\arcsin\left(\frac{R_*}{a}\sqrt{(1 + \sqrt{\delta})^2 - b^2} \right) $

The ingress/egress time were calculated by subtracting the full width half maximum transit time

$ T = \frac{P}{\pi}\arcsin\left(\frac{R_*}{a}\sqrt{1 - b^2} \right) $

from the total transit time.

Note: these formulae assume a circular orbit.


If the parameters were unknown, the following values were used:

$ R_* = R_{sun} $

$ \delta = 0.01 $

$ b = 0 $

If a or P were unknown, the transit duration was left blank.