penumbralBegin property
final
Contacts (Julian days in Terrestrial Time), the same for the whole Earth: the Moon's limb touches the penumbra from outside (P1, P4) and the umbra from outside (U1, U4) and from inside (U2, U3). U1 and U4 are null for a penumbral eclipse, U2 and U3 unless it is total.
Implementation
final double penumbralBegin, penumbralEnd;