20080120 Sun

Clear sky!!! We got clear sky today here in Hong Kong, transparency is like 7/10, seeing is 5/10, a pretty good day, the sun surface is very silent, virtually nothing and we got two prominences. Borg 45ED II, SM40/BF10 used at first, and then C5/PST next. I also used the Canon 10x30 IS to have a look in white light, nothing basically.

Let's show three shots first, they're taken at 1525 (GMT+8), 1526 (GMT+8) and 1536 (GMT+8), the first two are taken with Borg 45ED II, SM40/BF10 at prime focus, and the last one is double stacked with a PST etalon. The first one is target at the surface detail and the second one is on the prominences, the last one is taken with exposure suitable for surface detail. You can see that the double stacked shot shows both surface detail and prominences pretty well at the same time.





And as you can see from the 1526 (GMT+8) shot, you can see there're two prominences, and here're two close up taken at 1528 (GMT+8), and 1530 (GMT+8), they're taken with Borg 45ED II at 3x, SM40/BF10:-




Finally, we have five shots taken with the C5/PST setup:-

1551 (GMT+8):-


1553 (GMT+8):-


1600 (GMT+8):-


1606 (GMT+8):-


1613 (GMT+8):-


I really love this kind of prominences especially when we have no surface detail to look at :-)