This rather unusual solar eruption happened at around 15:10 UTC on the 5th September.
It's unusual in that it appears to erupt out of nowhere with no visible trail. It just seems to be a ball of plasma.
From the start of the event, about 4s in when a small disturbance can be seen on the limb, to the object disappearing was just 18 frames, equivalent to 4m 30s in real time.
Roughly scaling from measuring the PC monitor, it was travelling at about 1.54M km/hr.
Equipment:
Scope: Coronado PST
Camera: Altair GP-CAM3 178M
Mount: Sky-Watcher NEQ6 Pro
Time-lapse images taken every 15s, compiled to video using PiPP and VirtualDub
Thinking this really was something different, I contacted the BAA. BAAs Peter Meadows the director of the Solar Section got in touch. He passed it on to STCE in Belgium and they included it as an addendum to a news letter, along with another observation made by Scott Benavente in the USA.
https://www.stce.be/news/835/welcome.html
(Scroll to the Addendum at the bottom of the article)
Thanks to Peter Meadows (BAA) and Jan (STCE).
Stills of the Sun around midday the same day.
On the left white light image, Sky-Watcher 80ED PRO
On the right Ha image, Coronado PST