Yesterdays prominence is still developing. I have attached the last 2 days images for comparison.
Author Archives: Roger Samworth
Nothing much astronomical on our recent trip around around the North Coast 500 in Scotland. (https://www.visitscotland.com/see-do/tours/driving-road-trips/north-coast-500/) Fantastic, by the way. Totally lives up to its billing as “Scotland’s stunning answer to Route 66 – – – named one of the top coastal road trips in the world”)
However, lots of nice atmospherics – rainbows and crepescular rays. Here are a few of them.
The last one I couldn’t resist posting – Salmon leaping to get a better view of the sky at the Falls of Shin!
This post (http://spaceweathergallery.com/indiv_upload.php?upload_id=148025&PHPSESSID=ufu9aq45u6ht3gl4rhuesc8jj2)
is entitled “Ionize Calcium / Better Than H-alpha?”
Not sure I’m convinced!
Compare with this a day earlier – http://spaceweathergallery.com/indiv_upload.php?upload_id=147977&PHPSESSID=ufu9aq45u6ht3gl4rhuesc8jj2
(same as this: https://roslistonastronomy.uk/nice-prominences-this-morning-13-09-2018)
Need to see Ha and Ca-K at the same time. Pete? Andy?
Interestingly, although we have no sunspots, prominences are fairly abundant.
To all (both?) of you with Ca-K filters, this says you can see prominences in Ca-K.
If anyone is interested, it looks like the Martian dust storm has subsided.