Date   
Re: Wind

Dan Crowson
 

I’m thinking along the same lines. I would say the ASV stuff isn’t even worth referencing because they’re up against the mountains. I’ve seen completely different results from monitors on site and the Weather Underground site in Animas, too. Adding on, with our building, we’re fairly shielded east and west, too but I get all the wind north and south so it can even be more of a challenge. Our high-tech, most reliable method has been looking at our Walmart bag hanging over our warm room door.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Wednesday, April 19, 2017 4:21 PM
To: DarkSkyNewMexico@...
Subject: Re: [DarkSkyNewMexico] Wind

 

 

Wind is a tough one down at Dark Skies.... everyone's monitor can be shielded from the wind based on what direction it's coming from. Until we get to a point where we can have a real central point of reference ( like a wind sensor on a tower or something, we will always have this problem.  My advice for now is gather all the info you can from multiple points and go with that.  No one wind sensor down there right now will be accurate for every building.

 

Al

 

 

On Tue, Apr 18, 2017 at 9:47 PM, Howard Anderson handy13@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Hi Bernard,

I am not...  I am seeing winds on my guage variable of 5 to 11 MPH and that
is from just taking a look over a 10 second period...

This site over in Arizona Sky Village which is relatively nearby has
a really good display of wind speeds: 
http://www.skyimager.net/weather/ASVweather1.html
and can be used as an additional data point perhaps...

http://squall.sfsu.edu/scripts/jetstream_model.html
can be used to see the jetstream and wind vectors...
Not looking good at the moment...

Thanks,

Howard


Bernard Miller bgmiller011@... [DarkSkyNewMexico] wrote:

 

Is anyone imaging? I have two wind monitors and one is registering 20+ mph and the other is saying less than 5mph.

 

 

Re: Wind

Al Acker
 

Pilots have been looking at wind socks for a long time... They are very reliable till some kids toss stones stones into them😁

On Apr 19, 2017 16:37, "'Dan Crowson' dcrowson@... [DarkSkyNewMexico]" <DarkSkyNewMexico@...> wrote:
 

I’m thinking along the same lines. I would say the ASV stuff isn’t even worth referencing because they’re up against the mountains. I’ve seen completely different results from monitors on site and the Weather Underground site in Animas, too. Adding on, with our building, we’re fairly shielded east and west, too but I get all the wind north and south so it can even be more of a challenge. Our high-tech, most reliable method has been looking at our Walmart bag hanging over our warm room door.

 

Dan

----          
Dan Crowson                          dcrowson@crowson.com
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@yahoogroups.com [mailto:DarkSkyNewMexico@yahoogroups.com]
Sent: Wednesday, April 19, 2017 4:21 PM
To: DarkSkyNewMexico@yahoogroups.com
Subject: Re: [DarkSkyNewMexico] Wind

 

 

Wind is a tough one down at Dark Skies.... everyone's monitor can be shielded from the wind based on what direction it's coming from. Until we get to a point where we can have a real central point of reference ( like a wind sensor on a tower or something, we will always have this problem.  My advice for now is gather all the info you can from multiple points and go with that.  No one wind sensor down there right now will be accurate for every building.

 

Al

 

 

On Tue, Apr 18, 2017 at 9:47 PM, Howard Anderson handy13@... [DarkSkyNewMexico] <DarkSkyNewMexico@yahoogroups.com> wrote:

 

Hi Bernard,

I am not...  I am seeing winds on my guage variable of 5 to 11 MPH and that
is from just taking a look over a 10 second period...

This site over in Arizona Sky Village which is relatively nearby has
a really good display of wind speeds: 
http://www.skyimager.net/weather/ASVweather1.html
and can be used as an additional data point perhaps...

http://squall.sfsu.edu/scripts/jetstream_model.html
can be used to see the jetstream and wind vectors...
Not looking good at the moment...

Thanks,

Howard


Bernard Miller bgmiller011@... [DarkSkyNewMexico] wrote:

 

Is anyone imaging? I have two wind monitors and one is registering 20+ mph and the other is saying less than 5mph.

 

 

Re: Arp 303

Bernard Miller
 

Another nice galaxy field Dan.

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Wednesday, April 19, 2017 3:31 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] Arp 303

 

 

Arp 303 consists of IC 564 (UGC 5230 and others), the spiral left (east) of center and IC 563 just below it. Both are approximately 275 million light-years away in Sextans.

 

IC 561 is the odd-looking spiral just above center.

 

UGC 5224 is the low surface brightness galaxy at the bottom center.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged April 14th, 15th and 17th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33988174492/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Asteroid 2014 JO25

Dan Crowson
 

Asteroid 2014 JO25

2017-04-20 - Animas NM

07:33:21 - 08:36:02 UTC

Astro-Tech AT12RCT - SBIG STF-8300M

Luminance:  120x30s binned 2x2

 

Movie - https://www.flickr.com/photos/dcrowson/34006328492

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Asteroid 2014 JO25

Mark Hanson
 

Very cool Dan!

 

Mark

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Thursday, April 20, 2017 2:36 PM
To: 'Dan Crowson'
Subject: [DarkSkyNewMexico] Asteroid 2014 JO25

 

 

Asteroid 2014 JO25

2017-04-20 - Animas NM

07:33:21 - 08:36:02 UTC

Astro-Tech AT12RCT - SBIG STF-8300M

Luminance:  120x30s binned 2x2

 

Movie - https://www.flickr.com/photos/dcrowson/34006328492

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

DSNM Well Represented in the June Astronomy Magazine

Dan Crowson
 

I always like to come home and find the white Astronomy Magazine envelope in my mailbox. That always means they’ve sent me a couple of copies of the magazine because I have an image in it. The June Gallery includes my image of NGC 3201, a globular in Vela that I shot while onsite in in January. The next page includes a nice image of IC 423 and 424 taken by Howard C. Anderson. While I don’t see the image on his website, I believe this is by Howard at DSNM.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: DSNM Well Represented in the June Astronomy Magazine

Howard Anderson
 

Hi Dan,

Thanks!  Yes, that is my image.  I have not put it up on my web page yet.
I was very pleased but quite pleasantly suprised that they are printing my image.
(But they didn't send me any advance copies...  At least not yet...  They just
sent me an email saying it would be in the June issue...)

I have several other images that I have also been dragging my feet on with
respect to posting on my web page.  You guys are all so good that I
have sometimes hesitated wondering if my images were good enough...

Also, too easy for me to get sidetracked with investigations of other stuff
such as RR Lyrae stars.  Since there was a full moon, M3 seemed to
be a suitable object for further work...

I am currently writing Visual Basic software to automate processing
of 74 5-minute M3 images I took a few of days ago to make a movie
hopefully showing RR Lyrae stars as they brighten and dim.  I figured out this morning
how to get them all scaled with respect to brightness and apply other operations
to create a decent movie.  Still doing lots of testing and trying various operations
that Maxim DL makes available in their scripting language.  Discovered VBEdit
a few days ago which has greatly helped in VBS development.

Also have written a script to run in Photoshop to remove red, green, and
blue dots caused, I think, by cosmic ray particles.   Normally, stacking removes
these but the movie needs to be frame-by-frame without stacking.   So far I
think that this operation in Photoshop might alter the brightness of the images
so I am still testing to see what works...

I also wrote a Visual C# program a day or two ago to put sequential numbers
on a collection of images so that the movie images will show sequential numbers. 

I have an earlier movie of M3 images at http://www.astroshow.com/Globulars/M3.html.
I am hoping to improve on that movie but time will tell...  (And as usual, this is taking
MUCH more time than I anticipated originally...)

Thanks!

Howard

'Dan Crowson' dcrowson@... [DarkSkyNewMexico] wrote:

 

I always like to come home and find the white Astronomy Magazine envelope in my mailbox. That always means they’ve sent me a couple of copies of the magazine because I have an image in it. The June Gallery includes my image of NGC 3201, a globular in Vela that I shot while onsite in in January. The next page includes a nice image of IC 423 and 424 taken by Howard C. Anderson. While I don’t see the image on his website, I believe this is by Howard at DSNM.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 


Re: Asteroid 2014 JO25

Howard Anderson
 

Hi Dan,

Both your videos are superb!  Really great!

Thanks,

Howard

'Dan Crowson' dcrowson@... [DarkSkyNewMexico] wrote:

 

Asteroid 2014 JO25

2017-04-20 - Animas NM

07:33:21 - 08:36:02 UTC

Astro-Tech AT12RCT - SBIG STF-8300M

Luminance:  120x30s binned 2x2

 

Movie - https://www.flickr.com/photos/dcrowson/34006328492

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 


wind

Bernard Miller
 

Hi,

 

Is anyone imaging? Wind is all over the place. Zero for a while, then 15mph. Just wondered if anyone else is imaging.

 

Bernard

 

Re: wind

Dan Crowson
 

We’re open as usual. Seeing is not too great.

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Thursday, April 20, 2017 10:31 PM
To: DarkSkyNewMexico@...
Subject: [DarkSkyNewMexico] wind

 

 

Hi,

 

Is anyone imaging? Wind is all over the place. Zero for a while, then 15mph. Just wondered if anyone else is imaging.

 

Bernard

 

Re: DSNM Well Represented in the June Astronomy Magazine

Bernard Miller
 

Congrats both of you. I haven’t gotten my copy yet. Can’t wait to see them.

 

Bernard

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Thursday, April 20, 2017 3:26 PM
To: DarkSkyNewMexico@...
Cc: Michael Hensley
Subject: [DarkSkyNewMexico] DSNM Well Represented in the June Astronomy Magazine

 

 

I always like to come home and find the white Astronomy Magazine envelope in my mailbox. That always means they’ve sent me a couple of copies of the magazine because I have an image in it. The June Gallery includes my image of NGC 3201, a globular in Vela that I shot while onsite in in January. The next page includes a nice image of IC 423 and 424 taken by Howard C. Anderson. While I don’t see the image on his website, I believe this is by Howard at DSNM.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: DSNM Well Represented in the June Astronomy Magazine

Eric Africa <eja24601@...>
 

Congrats, too! There's a lot of great images being churned out lately, keep up the great work!




From: DarkSkyNewMexico@... on behalf of 'Bernard Miller' bgmiller011@... [DarkSkyNewMexico]
Sent: Friday, April 21, 2017 1:03 AM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] DSNM Well Represented in the June Astronomy Magazine
 
 

Congrats both of you. I haven’t gotten my copy yet. Can’t wait to see them.

 

Bernard

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Thursday, April 20, 2017 3:26 PM
To: DarkSkyNewMexico@...
Cc: Michael Hensley
Subject: [DarkSkyNewMexico] DSNM Well Represented in the June Astronomy Magazine

 

 

I always like to come home and find the white Astronomy Magazine envelope in my mailbox. That always means they’ve sent me a couple of copies of the magazine because I have an image in it. The June Gallery includes my image of NGC 3201, a globular in Vela that I shot while onsite in in January. The next page includes a nice image of IC 423 and 424 taken by Howard C. Anderson. While I don’t see the image on his website, I believe this is by Howard at DSNM.

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Arp 225

Dan Crowson
 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Arp 225

Mark Hanson
 

Dan,
Really nice! This is on my list with the 24".
Surely more faint outer shell.
Mark


On Apr 21, 2017, at 1:34 PM, 'Dan Crowson' dcrowson@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Arp 225

Mark Hanson
 

Did you know Adam is not there anymore?

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:51 PM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

Mark,

 

I would think so. A target Adam hasn’t shot with the 32”, too.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 7:22 PM
To: DarkSkyNewMexico@...
Subject: Re: [DarkSkyNewMexico] Arp 225

 

 

Dan,

Really nice! This is on my list with the 24".

Surely more faint outer shell.

Mark


On Apr 21, 2017, at 1:34 PM, 'Dan Crowson' dcrowson@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Arp 225

Dan Crowson
 

Mark,

 

I would think so. A target Adam hasn’t shot with the 32”, too.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 7:22 PM
To: DarkSkyNewMexico@...
Subject: Re: [DarkSkyNewMexico] Arp 225

 

 

Dan,

Really nice! This is on my list with the 24".

Surely more faint outer shell.

Mark


On Apr 21, 2017, at 1:34 PM, 'Dan Crowson' dcrowson@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

NGC 2634 and friends

Mark Hanson
 


This is taken with a 17in Planewave telescope with SBIG 16803 from DSNM.

Such an interesting FOV showing a little bit of everything.


https://static1.squarespace.com/static/57e97e6ab8a79be1e7ae0ae6/t/58edc4223a0411f799fb0490/1491977261598/NGC2634-4.jpg

Mark Hanson

Re: NGC 2634 and friends

Dan Crowson
 

Mark,

 

This is really neat. None of the outer shell shows up at all on the survey images. I definitely need to image this one. I actually see it on my list based on an image Bob Franke did awhile back.

 

Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:56 PM
To: DarkSkyNewMexico@...
Subject: [DarkSkyNewMexico] NGC 2634 and friends

 

 


This is taken with a 17in Planewave telescope with SBIG 16803 from DSNM.

Such an interesting FOV showing a little bit of everything.


https://static1.squarespace.com/static/57e97e6ab8a79be1e7ae0ae6/t/58edc4223a0411f799fb0490/1491977261598/NGC2634-4.jpg

Mark Hanson

Re: Arp 225

Dan Crowson
 

No. Has he moved on? It has been a year or more since I’ve seen him. I got the feeling it was a bit of a labor of love (of getting to use the big scope) that would eventually not work out because it doesn’t pay the bills.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:50 PM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

Did you know Adam is not there anymore?

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:51 PM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

Mark,

 

I would think so. A target Adam hasn’t shot with the 32”, too.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 7:22 PM
To: DarkSkyNewMexico@...
Subject: Re: [DarkSkyNewMexico] Arp 225

 

 

Dan,

Really nice! This is on my list with the 24".

Surely more faint outer shell.

Mark


On Apr 21, 2017, at 1:34 PM, 'Dan Crowson' dcrowson@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Arp 225

Mark Hanson
 

I think they let him go, budget cuts.

 

 

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Saturday, April 22, 2017 12:16 AM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

No. Has he moved on? It has been a year or more since I’ve seen him. I got the feeling it was a bit of a labor of love (of getting to use the big scope) that would eventually not work out because it doesn’t pay the bills.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:50 PM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

Did you know Adam is not there anymore?

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 11:51 PM
To: DarkSkyNewMexico@...
Subject: RE: [DarkSkyNewMexico] Arp 225

 

 

Mark,

 

I would think so. A target Adam hasn’t shot with the 32”, too.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@... [mailto:DarkSkyNewMexico@...]
Sent: Friday, April 21, 2017 7:22 PM
To: DarkSkyNewMexico@...
Subject: Re: [DarkSkyNewMexico] Arp 225

 

 

Dan,

Really nice! This is on my list with the 24".

Surely more faint outer shell.

Mark


On Apr 21, 2017, at 1:34 PM, 'Dan Crowson' dcrowson@... [DarkSkyNewMexico] <DarkSkyNewMexico@...> wrote:

 

Arp 225 (NGC 2655, UGC 4637, VV 1248 and others) is a Seyfert, lenticular galaxy located approximately 66 million light-years away in Camelopardalis.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged March 14th, 16th, 17th and 18th, 2017 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/33371015743/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com