Here is a gif from the Sept. 20 transit and shadow transit. This covers about half an hour of rotation. #astrophotography 🔭🧪

For a holiday treat, I made some NI3 for my class. It's a morning class; the batch I made the night before went off overnight. This was pretty damp so I had to hit it a little harder. Still, always a fun bang. Between 500mg and a gram. #chemsky

On Saturday (16 Nov) evening. I found a cute lineup of three of Jupiter's moons. I imaged them once per minute for an hour and made a short video. That video repeats here several times. Europa moving quick, Callisto the dimmest. Jupiter is the blown out disk. 🔭 #astrophotography

This is the same video as the original, but annotated so that you can see a label for Uranus and the four minor planets. The stars flicker more than in the file on my computer. Data compression? Just flickering isn't the planet - must be motion.

Uranus is at opposition tonight. I'd hoped to image it, but...clouds. So, here is a two frame blink from Dec 11/13, 2023. Uranus' motion is fairly obvious but there are 4 minor planets as well. Can you find them? Annotated video (and alt-text) as a reply. 🔭 #astrophotography #uranus

Tethys emerging from Saturn's shadow on October 2, 2023. Dione is to the lower right. Imaged with a 15" scope in IR light. You can see the disk's shadow on the rings. Saturn is visible in the evenings now for a bit longer. Go take a look, it'll do your heart good. 🔭 #astrophotography

I tried to post this as a gif several weeks ago and it failed. Trying again as a video. I practiced and practiced automated imaging for the April 8 TSE and then made a change in the field just before. Computer crashed 10s after 2nd contact. Alas. This is the last 0.5s before. 🔭 #astrophotography

Europa passing behind Ganymede as seen from my driveway, 24 Mar 2015. There is something funky in the sharpening that makes it hard to tell which is behind, but it is definitely Europa. More in the alt text. IR (>685nm) light, 382mm reflector. 🔭 #astrophotography