NGC 6888 - Crescent Nebula in Cygnus

Dear group,

I have spent the past couple of evenings pursuing the stunning emission
nebula NGC 6888 in Cygnus with mixed results. Although successful at
capturing the plethora of stars in the region (nearly 8000 stars in my
image), I was partially successful in acquiring the dim portions of the
Crescent Nebula.

For last night's result based on just under five hours total exposure,
please see http://www.perseus.gr/Astro-DSO-NGC-6888.htm .... all
comments and suggestions welcome!

Anthony.

Anthony Ayiomamitis wrote in news:f7qfn2$as$1
@mouse.otenet.gr:

Dear group,

I have spent the past couple of evenings pursuing the stunning emission
nebula NGC 6888 in Cygnus with mixed results. Although successful at
capturing the plethora of stars in the region (nearly 8000 stars in my
image), I was partially successful in acquiring the dim portions of the
Crescent Nebula.

For last night's result based on just under five hours total exposure,
please see http://www.perseus.gr/Astro-DSO-NGC-6888.htm .... all
comments and suggestions welcome!

Its nice looking as usual, but I believe you could do much better on that
one, including catching the nebular ghosts around NGC 6888 itself, if you
used a H-Alpha filter and used that as luminance. I got a higher level of
signal from a an 10x10min exposure in a poorly collimated 200SS under mag
2.5 skies in Belgium.

Give it a try, the area doesn't lack bright guide stars anyway.

--
Pierre Vandevenne - DataRescue sa/nv - www.datarescue.com
The IDA Pro Disassembler & Debugger - world leader in hostile code analysis
PhotoRescue - advanced data recovery for digital photographic media
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Pierre Vandevenne wrote:
Anthony Ayiomamitis wrote in news:f7qfn2$as$1
@mouse.otenet.gr:

Dear group,

I have spent the past couple of evenings pursuing the stunning emission
nebula NGC 6888 in Cygnus with mixed results. Although successful at
capturing the plethora of stars in the region (nearly 8000 stars in my
image), I was partially successful in acquiring the dim portions of the
Crescent Nebula.

For last night's result based on just under five hours total exposure,
please see http://www.perseus.gr/Astro-DSO-NGC-6888.htm .... all
comments and suggestions welcome!


Hi Pierre,

Its nice looking as usual, but I believe you could do much better on that
one,

I agree fully there is much more room for improvement.

including catching the nebular ghosts around NGC 6888 itself, if you
used a H-Alpha filter and used that as luminance. I got a higher level of
signal from a an 10x10min exposure in a poorly collimated 200SS under mag
2.5 skies in Belgium.

I did try h-alpha the first night out (Astronomik 13nm) and 12x15min
exposures but the result was not very much different.


Give it a try, the area doesn't lack bright guide stars anyway.


This is certainly true and even when imaging in h-alpha.

Anthony.

On Jul 20, 3:09 pm, Anthony Ayiomamitis
wrote:
Dear group,

I have spent the past couple of evenings pursuing the stunning emission
nebula NGC 6888 in Cygnus with mixed results. Although successful at
capturing the plethora of stars in the region (nearly 8000 stars in my
image), I was partially successful in acquiring the dim portions of the
Crescent Nebula.

For last night's result based on just under five hours total exposure,
please seehttp://www.perseus.gr/Astro-DSO-NGC-6888.htm.... all
comments and suggestions welcome!

Anthony.

Do try it in Hydrogen Alpha - great fun and lots of fine detail to
tease out.

Martin N

http://www.martin-nicholson.info/index.htm

wrote:
On Jul 20, 3:09 pm, Anthony Ayiomamitis
wrote:
Dear group,

I have spent the past couple of evenings pursuing the stunning emission
nebula NGC 6888 in Cygnus with mixed results. Although successful at
capturing the plethora of stars in the region (nearly 8000 stars in my
image), I was partially successful in acquiring the dim portions of the
Crescent Nebula.

For last night's result based on just under five hours total exposure,
please seehttp://www.perseus.gr/Astro-DSO-NGC-6888.htm.... all
comments and suggestions welcome!

Anthony.


Hi Martin,

Do try it in Hydrogen Alpha - great fun and lots of fine detail to
tease out.

My first stab at NGC 6888 was indeed with an h-alpha (Astronomic 13nm)
but I was disappointed at the result following three hours total
exposure (12x15min subs). It is for this reason last night I revisited
an RRGB approach and the results are virtually the same.

I will give it another shot with h-alpha and this time I will pursue a
greater total exposure (ex. five hours).

Anthony.


Martin N

http://www.martin-nicholson.info/index.htm

Anthony,

Well you promised us this one and you certainly made good
on your promise. Fine work!

Ben

Ben wrote:
Anthony,

Hi Ben,


Well you promised us this one and you certainly made good
on your promise. Fine work!

How about the Iris nebula or the Fireworks Galaxy next? ;-)

Anthony.


Ben

How about the Iris nebula or the Fireworks Galaxy next? ;-)

Anthony.

Either/or..... How about both? I'm sure they will be as
well done as the rest of your captures.

Ben