--- In TAC-imaging@yahoogroups.com, "ancient.sull" <ancient.sull@...> wrote:
>
> --- In TAC-imaging@yahoogroups.com, "Keith Myers" <keith.myers@> wrote:
> > Did the outer envelope mostly come from Ha data?
>
> 80-90% from Ha. From the Lum you can tell there is a hazy cloud there but no
detail. Note that is 14 hours of Ha BTW. And when I say I can see some haziness
with the Lum (before adding Ha) that is a composite lum from adding the L, R, G
and B so it is about 7-8 hours of effective Lum.
>

Drew I did see that exposure length for the Ha. I was wondering if it is
necessary to go that long to even get a glimpse of the outer shells.From your
statement about the hint with just the combined luminance, I guess so. That is
one darn faint element of the Ring.
I don't know when I will get the patience to go that long on one subject. I get
antsy and move on to other targets. So many targets and never enough dark to
satisfy.

Keith