Rectangle over San Dimas, CA

The report, as filed

On March 26, 2023, I was traveling eastbound up a hill on Avenida Ladera in San Dimas, CA, just after 2:00 pm. The day was a clear, cloudless day. I was in a convertible with the top down so I could easily see high in the sky. I notice the waxing crescent moon and a very bright object that was as bright as Venus usually is in the evening sky. I knew I should not see a star or planet that brightly at that time of day so I pulled over to observe it. At first, the object appeared to be still but I realized it was moving slowly. It appeared as a single bright object but appeared to be a reflection rather than lights. I thought it might be a satellite but still was not sure. It was moving much slower than any satellite I have observed before, especially the ISS. I pulled out my phone to take some pictures of the object. I also took a picture of a passing jet, the moon, and tree as I was getting use to the setting on my phone camera. I zoomed in as far as the camera would allow me, stable my phone against the car, and took a picture. I then zoomed in on the object in the photo. The object appeared to be a rectangular object with a very bright reflection or light on it. I saw no appendages like solar panels or balloon. As I continued to observe the object it eventually lost brilliance and faded away, much like a satellite disappears into the darkness of the sky except it just disappeared. The object appeared to be travelling toward the west or west-southwest direction. My total observation time was approximately 4 minutes. The phone camera used was on a Samsung S23 Ultra with settings present in the meta-data of each picture. In one of the photos the object is about 1130 position relative to the moon. Another photo the object is at the 0930 position relative to the moon.

Held as-reported from National UFO Reporting Center (record NUFORC #175458). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.