Respuesta :
-- the Earth is at perihelion (around January 5)
and
-- the Moon is at perigee (once every 27.32 days)
and
either
-- the Moon is New (once every 29.53 days)
or
-- the Moon is Full (once every 29.53 days)
and
-- the Moon is at perigee (once every 27.32 days)
and
either
-- the Moon is New (once every 29.53 days)
or
-- the Moon is Full (once every 29.53 days)