Friday morning UT this newly discovered asteroid made its closest approach. I had rain all day but it cleared leaving horrid seeing. By 2 a.m. it had cleared up to 5", which was far better than the 8" I had earlier. So I took 20 minutes of data on it ending somewhat into dawn. Due to the severe seeing issue I reduced this to 3.16 seconds per pixel. This is the entire frame. No cropping, so about 32' by 22' in size, same as my normal posts. My astronomy club has kindly posted it to their website as it is far too big for posting here. No guiding was used for the image. The Sky used the orbital data for the asteroid to calculate offset values for normal sidereal tracking allowing the asteroid to remain fixed in my FOV while the stars trailed. This one is coming in from nearly due south so the motion is nearly totally to the north with a slight eastward component. It was moving nearly one second of arc per second. The file is very large. Give it time to load then the animation will run smoothly at 50x real time.
Edit: At the time I took this it was thought it was a rather small asteroid, a block or so in diameter. But now it is seen as being a full kilometer in diameter by radar measurments by Arecibo. But they've now pinned down its orbit well enough to say it won't be a risk for at least 750 years. Beyond that they can't say for sure but that doesn't mean it will then hit us. Far from it. Just that the orbit can't be pinned down enough to make an accurate prediction beyond this.
14" LX200R @ f/10, 20x1', STL-11000XM, Paramount ME