So this is "discovery" number two. It's pretty neat to see something moving in the images and have no idea what it is until you investigate. Juno is the 11th largest asteroid in the solar system and the third asteroid ever discovered (hence its 3 designation from the MPC). Unlike Mars which moves somewhat obviously against the background of stars from night to night, you would never see Juno without some help - I wouldn't at least. It's even a little challenging to see it on the aligned frames in the second image set. SkyDelta picks it up though (along with some noise).

1. Original frames cropped and processed. 2019-02-03 through 2019-02-06 at approximately 8pm.

2. Aligned original frames. You can see the motion here if you look close enough.

3. SkyDelta motion detection frame by frame. Juno is the only linear sequential feature.

4. Composite motion detection - Juno's motion is highlighted just in case you still couldn't find it.

5. Here's one of the original frames marked up with some references on it. Juno is marked by the arrow.

6. And here's Stellarium's sky configuration for the same evening with the same references. Juno actually looks a little too close to the circled refrences compared to the actual observation, but it is by far the brightest moving object in the sky anywhere in this vicinity so I'm pretty confident it's Juno we're looking at.

Process notes:


Published: April 13, 2019