Good Observing. I haven't seen Mercury. The Sun goes down in the trees from my yard. Anyway, FYI, what you saw was a Shadow transit, not a Moon transit. Common error. A Moon transit is even better. I've seen that. It's when the Moon itself passes in front of the globe of Jupiter. There's not usually a shadow involved. It's an amazing sight. You see the bright spot of the moon itself against the globe. We watched one night as the Moon approached the globe and went in front of it. Real 3D effect. The Moon looked like a bee-bee. Have to catch that again. It's hard to spot if you didn't see it move from outside the globe to on top of it. Try to catch that sometime, you'll love it!
That's it;
BOB SAL