ASTRO: Sh2-170 in halpha

I am just getting started on this.

I went to the Ranch on Saturday and shot this Saturday night.

I only got 2h 40 minutes total exposure so it is a bit dim right now

http://www.narrowbandimaging.com/sh2...s4_ha_page.htm

Richard Crisp wrote:

I am just getting started on this.

I went to the Ranch on Saturday and shot this Saturday night.

I only got 2h 40 minutes total exposure so it is a bit dim right now

http://www.narrowbandimaging.com/sh2...s4_ha_page.htm


While it looks a bit like SH2-212 I did it is really a heck of a lot
fainter. That is very good for only 40 minutes on something that faint!
I put off doing that one it was so faint.

Though last night I put 3 hours in on something even fainter. It has no
narrow band emission as it is glowing dust not gas. I need several more
nights. 3 hours was all I had between moon set and dawn. Worse tonight
of course. Skies don't look promising either. Good luck on getting
more photons on this Sharpless target.

Smoke a problem at the ranch? I have it some nights here. Calms seeing
and doesn't block all that many photons so rather a good thing for me
when I get some smoke. I don't want the fires however, just enough smoke
to calm seeing.

Rick

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Third character is a zero rather than a capital "Oh".

"Rick Johnson" wrote in message
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Richard Crisp wrote:

I am just getting started on this.

I went to the Ranch on Saturday and shot this Saturday night.

I only got 2h 40 minutes total exposure so it is a bit dim right now

http://www.narrowbandimaging.com/sh2...s4_ha_page.htm


While it looks a bit like SH2-212 I did it is really a heck of a lot
fainter. That is very good for only 40 minutes on something that faint! I
put off doing that one it was so faint.


no no: that is 2 hours 40 minutes.... still quite faint



Though last night I put 3 hours in on something even fainter. It has no
narrow band emission as it is glowing dust not gas. I need several more
nights. 3 hours was all I had between moon set and dawn. Worse tonight
of course. Skies don't look promising either. Good luck on getting more
photons on this Sharpless target.

Smoke a problem at the ranch? I have it some nights here. Calms seeing


the smoke is completely gone. the skies were beautiful but there's a bit of
moon...

and doesn't block all that many photons so rather a good thing for me when
I get some smoke. I don't want the fires however, just enough smoke to
calm seeing.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Richard Crisp wrote:



While it looks a bit like SH2-212 I did it is really a heck of a lot
fainter. That is very good for only 40 minutes on something that faint! I
put off doing that one it was so faint.



no no: that is 2 hours 40 minutes.... still quite faint


Oops, I need to put on my computer glasses! That makes more sense!



the smoke is completely gone. the skies were beautiful but there's a bit of
moon...

Yeah, that is a pain. But the clouds that just covered it up are even
more of a problem! Looks like tonight is a loss.

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

btw Sh2-170 is the "treetop ornament" on this cosmic christmas tree:

http://www.narrowbandimaging.com/ced...2hao3_page.htm

I've been meaning to shoot it in some closeup detail for some time, but only
now have begun to try

btw Sh2-170 is the "treetop ornament" on this cosmic christmas tree:

http://www.narrowbandimaging.com/ced...2hao3_page.htm

I've been meaning to shoot it in some closeup detail for some time, but only
now have begun to try

Richard Crisp wrote:
btw Sh2-170 is the "treetop ornament" on this cosmic christmas tree:

http://www.narrowbandimaging.com/ced...2hao3_page.htm

I've been meaning to shoot it in some closeup detail for some time, but only
now have begun to try


Boy that's a wide field. What is the fov of that 150mm lens with that
CM10XME?

Gorgeous shot!

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

"Rick Johnson" wrote in message
. com...


Richard Crisp wrote:
btw Sh2-170 is the "treetop ornament" on this cosmic christmas tree:

http://www.narrowbandimaging.com/ced...2hao3_page.htm

I've been meaning to shoot it in some closeup detail for some time, but
only now have begun to try


Boy that's a wide field. What is the fov of that 150mm lens with that
CM10XME?

Gorgeous shot!

Rick



glad you like it Rick

the FOV is:

Takumar 150mm f/2.8
used at f/4 with CM10XME, 9.35 arc-sec/pixel
5.68 x 3.81 degrees or 21.69 square degrees FOV

Wow! That is cool!

Richard Crisp wrote:
btw Sh2-170 is the "treetop ornament" on this cosmic christmas tree:

http://www.narrowbandimaging.com/ced...2hao3_page.htm

I've been meaning to shoot it in some closeup detail for some time, but only
now have begun to try






--
John N. Gretchen III
http://www.tisd.net/~jng3