Diamond over Egan, SD

The report, as filed

This was still going on as of 5 minutes ago, I came in to fill out the report. Appears to the naked eye to be a bright white light but at times you can see red and yellow in it also. Looks about the size of a grapefruit and is at about a 45 degree angle above the horizon. My husband came home and said that there were 3 helicopters in the area which is unusual. About all we ever see for those are medical ones. He started telling me about this big bright light out in the west/southwest. I went out and looked and came in and got the video camera. Looking at the screen on max zoom (75x i.zoom) Panasonic HC-V130 camera) When I first located it, it was more like a bright white light but, as I zoomed in, it took on the shape of a diamond. The diamond looked to be a white or but, milky, not bright white. Other times, in the video it looks different shapes and a darker color like a charcoal gray. The night is clear, stars and moon visible. There are some towers about 6 miles west of here but, they have strobing lights and I am very familiar with them. I do not know what this is but, it is not a plane, helicopter or any other type of aircraft I am familiar with. I took several videos and a couple still pics. I just went to the back door to look out, it was 20:31 and it was gone. Sighting of Sirius?? PD

Held as-reported from National UFO Reporting Center (record NUFORC #117513). Witness text is preserved verbatim, including its spelling; nothing is edited beyond formatting.