The Iridium 21 satellite passed over my part of Iowa this morning before sunrise. I set the iPad Air 2 on a firm base pointed at an angle toward the NNW sky. At 6:02 am, I started the 102 sec exposure using the NightCap Camera app, same as for the ISS pass three days earlier. The satellite was going north as it entered the frame at the top. After about 30 sec, a highly reflective mirror-like antenna cast a beam of sunlight down toward me. It brightened to several times more than the planets Venus or Jupiter ever get. Then it dimmed and continued north.
Another satellite passed at the same time going toward the upper left from north-to-south. It is very faintly visible to the left of the flare. According to the Heavens Above database for my area, it was either a Russian satellite, or an Ariane rocket body.