An umbrella in a dream usually points to protection -- something you're using to guard yourself against an emotional storm you sense is coming. Forgetting your umbrella in the rain can reflect feeling unprepared for a difficulty, while a sturdy one often names readiness you've quietly built for yourself.
Planets under the Sun's beams, or within twelve degrees thereof, are unfortunate, unless in the same degree with him, but when passed 12 degrees from him (existentes orientales) they are fortunate. - William Lilly (1602.-1681.)