Date   

Re: Seeing

Rex Groves
 

Hi Bernard

I felt the same.  I thought my autofocus was way off and I spent an evening doing it manually to double check. I couldn’t get below 3 arches/pixel.  Last night my subs returned to sort of normal sub 3

Rex

On Jan 16, 2021, at 11:52 AM, Brian Ottum <ottum@...> wrote:

Bernard,
Do NOT question your equipment.  I just looked at every one of 80 subs I took throughout last night.  I’ve NEVER seen such huge variation in seeing, resulting in not only bloated stars, but stars that were COMPLETELY out of focus.  So out of focus that each diffraction spike was doubled! 
I attribute this to large air masses that drift over DSNM, which are significantly cooler or warmer (I don’t know which).  Huge air masses, with high columns.
I’m only at 1250mm so I cannot imagine what destruction in focus you were seeing.
Brian
 
 
From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Bernard Miller
Sent: Saturday, January 16, 2021 11:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Seeing
 
Hi,
 
I am starting to think there is something wrong with my setup. I am still struggling to get subs with FWHM less than 3. What are others getting and what are you using to measure? I can’t figure out if my problem is the seeing, my focus, or my guiding.
 
Thanks,
 
Bernard
 
 
 
 

 


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DSNM Seeing Monitor and Other Instruments

Dan Crowson
 

Continuing on Bernard’s message today (and the others from the previous few weeks) on seeing. I could be wrong but I think an on-site seeing monitor would help end some of the frustration. Several people have mentioned having a DSNM suite of these things. In the past, my group has attempted this using information from various other setups (and some of our own) on this page - https://adgsoftware.com/rh/boltwood/current.php. Most if not all of these devices just output a text file that we can securely copy or for lack of a better term web post back to a server and then display. You might notice that at one time there was access to an SQM.  

 

DSNM is wanting to move forward on doing something and I believe the seeing monitor is the most important piece that is currently lacking. If you have any recommendations on what and where to source one of these from (or would be willing, if only temporarily to provide and have integrated), please give a reply. Within reason, DSNM will fund the endeavor to have a suite of environmental instruments on site and available for all to see online.

 

Recommendations will be put together and a small team that has been formed will decide the shortlist and present to the DSNM owners to approve and move forward.


Dan

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

 


Re: Seeing

Dan Crowson
 

Bernard,

 

I would second what Brian said about it not being your equipment. I was right where you are last night. The first several hours I was seeing terrible stars and really strange oddities. I use FocusMax and I would see it see it get to the ‘first step’ where it would try to get to 10 HFD and then it moves to focus and the stars would get bigger (and really out of focus). It was totally strange. I spent the better part of a few hours, this is after chalking up the first several to just bad seeing and not imaging at all, thinking I had something broke. I punted and started a script and went to bed real late and woke up to some decent data. I looked and FocusMax had started working as normal and the runs were normal.

 

I do not know what is going on but it is beyond frustrating. On bad seeing nights, the numbers used to tend to come close to David Churchill’s monitor that is online over in ASV but all these bad nights we’ve had here recently haven’t really matched up. Here’s what his said for last night:

 

 

Dan

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

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Bernard Miller
Sent: Saturday, January 16, 2021 10:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Seeing

 

Hi,

 

I am starting to think there is something wrong with my setup. I am still struggling to get subs with FWHM less than 3. What are others getting and what are you using to measure? I can’t figure out if my problem is the seeing, my focus, or my guiding.

 

Thanks,

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 

 


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Re: Comet 141P Machholz and fragment

Gregg Ruppel
 

Bernard:
By stacking on the main comet's nucleus, stars and galaxies all get trailed.  The fragment is moving roughly the same as the parent (plus it is in about the same relative position as on other images).

Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/

On 1/16/2021 10:45 AM, Bernard Miller wrote:
Gregg,

How can you tell that is a fragment and not a star?

Bernard


-----Original Message-----
From: DarkSkyNewMexico@groups.io On Behalf Of Gregg Ruppel
Sent: Saturday, January 16, 2021 10:40 AM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Comet 141P Machholz and fragment

Hi all:

I think I was able to find one of the fragments (141Pb) recently broken off from 141P Machholz:

http://www.greggsastronomy.com/IMAGES/141P-Machholz-Lfrag.jpg

Luminance only, 20 x 60sec from Dark Sky New Mexico

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/







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Re: Comet 141P Machholz and fragment

Bernard Miller
 

Gregg,

How can you tell that is a fragment and not a star?

Bernard

-----Original Message-----
From: DarkSkyNewMexico@groups.io On Behalf Of Gregg Ruppel
Sent: Saturday, January 16, 2021 10:40 AM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Comet 141P Machholz and fragment

Hi all:

I think I was able to find one of the fragments (141Pb) recently broken off from 141P Machholz:

http://www.greggsastronomy.com/IMAGES/141P-Machholz-Lfrag.jpg

Luminance only, 20 x 60sec from Dark Sky New Mexico

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/







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Re: Seeing

Bernard Miller
 

Thanks Brian. I am at about 2.5x your FL so you can imagine what I am seeing. I think I am experiencing the same focus issue. Usually when the seeing is bad, my guide graph looks like a scatter plot and I just shut down. Recently, my guiding looks great, but I still end up with FWHM of 3-4. It is like I am guiding well on an out of focus image.

 

What do you use to measure your FWHM? I have found CCDInspector, CCDStack and Maxim to be completely different for the same image. I don’t know which one to believe.

 

Bernard

 

 

From: DarkSkyNewMexico@groups.io On Behalf Of Brian Ottum
Sent: Saturday, January 16, 2021 9:52 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Seeing

 

Bernard,

Do NOT question your equipment.  I just looked at every one of 80 subs I took throughout last night.  I’ve NEVER seen such huge variation in seeing, resulting in not only bloated stars, but stars that were COMPLETELY out of focus.  So out of focus that each diffraction spike was doubled!

I attribute this to large air masses that drift over DSNM, which are significantly cooler or warmer (I don’t know which).  Huge air masses, with high columns.

I’m only at 1250mm so I cannot imagine what destruction in focus you were seeing.

Brian

 

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Bernard Miller
Sent: Saturday, January 16, 2021 11:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Seeing

 

Hi,

 

I am starting to think there is something wrong with my setup. I am still struggling to get subs with FWHM less than 3. What are others getting and what are you using to measure? I can’t figure out if my problem is the seeing, my focus, or my guiding.

 

Thanks,

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 

 


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Comet 141P Machholz and fragment

Gregg Ruppel
 

Hi all:

I think I was able to find one of the fragments (141Pb) recently broken off from 141P Machholz:

http://www.greggsastronomy.com/IMAGES/141P-Machholz-Lfrag.jpg

Luminance only, 20 x 60sec from Dark Sky New Mexico

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/


Re: Seeing

Brian Ottum
 

Bernard,

Do NOT question your equipment.  I just looked at every one of 80 subs I took throughout last night.  I’ve NEVER seen such huge variation in seeing, resulting in not only bloated stars, but stars that were COMPLETELY out of focus.  So out of focus that each diffraction spike was doubled!

I attribute this to large air masses that drift over DSNM, which are significantly cooler or warmer (I don’t know which).  Huge air masses, with high columns.

I’m only at 1250mm so I cannot imagine what destruction in focus you were seeing.

Brian

 

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Bernard Miller
Sent: Saturday, January 16, 2021 11:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Seeing

 

Hi,

 

I am starting to think there is something wrong with my setup. I am still struggling to get subs with FWHM less than 3. What are others getting and what are you using to measure? I can’t figure out if my problem is the seeing, my focus, or my guiding.

 

Thanks,

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 

 


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Seeing

Bernard Miller
 

Hi,

 

I am starting to think there is something wrong with my setup. I am still struggling to get subs with FWHM less than 3. What are others getting and what are you using to measure? I can’t figure out if my problem is the seeing, my focus, or my guiding.

 

Thanks,

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 




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Re: PHD2 Multi-Star Guiding

William McLaughlin <IC5070@...>
 

Yes, We have been using it for weeks and find it does improved guiding stability noticeably. 
--
******************
My images can be found at:

and


Re: Seeing

Dan Crowson
 

Mine were really bad as well. Even my small, portable 600mm refractor had poor stars.

 

I’d rather it just be cloudy than clear skies with terrible seeing.


Dan

 

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

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Friday, January 15, 2021 11:53 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Seeing

 

My images from the whole night varied a lot...FWHM 4-5 at best, better in early AM.

 

 

 

Gregg

 

Visit my astronomy & astrophotography site



On Jan 15, 2021, at 8:28 AM, Brian Ottum <ottum@...> wrote:



My rig was down for a week, but miracle workers Dan and MJ got me up and running yesterday.  Was shooting all night and my images look very good. 

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of William McLaughlin
Sent: Friday, January 15, 2021 10:01 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Seeing

 

Lots of haze from high clouds the night of 13-14.  Tossed out maybe 75% of the images. Have not checked the data from 14-15 but it did look better as I gathered it.
--

******************
My images can be found at:

and


Re: Seeing

Gregg Ruppel
 

My images from the whole night varied a lot...FWHM 4-5 at best, better in early AM.




Gregg

Visit my astronomy & astrophotography site
www.greggsastronomy.com

On Jan 15, 2021, at 8:28 AM, Brian Ottum <ottum@...> wrote:



My rig was down for a week, but miracle workers Dan and MJ got me up and running yesterday.  Was shooting all night and my images look very good. 

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of William McLaughlin
Sent: Friday, January 15, 2021 10:01 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Seeing

 

Lots of haze from high clouds the night of 13-14.  Tossed out maybe 75% of the images. Have not checked the data from 14-15 but it did look better as I gathered it.
--

******************
My images can be found at:

and


Re: PHD2 Multi-Star Guiding

Yizhou Zhang
 

It’s indeed a pretty nice feature (long time wanted!) and I feel it helps. We’ve been using it since it’s rolled out.

 

Yizhou

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Michael Gratiot
Sent: Friday, January 15, 2021 7:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] PHD2 Multi-Star Guiding

 

I ran across this the other day and it looks like a pretty cool new feature going through the dev cycle for PHD2.

 

 

I ran across it while watching this youtube video about it.

 

 

Thought I would share.

 

Thanks,

Michael


Re: PHD2 Multi-Star Guiding

Brian Ottum
 

One of the developers of PHD2, Andy Galasso, was a tenant of DSNM until recently.

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Michael Gratiot
Sent: Friday, January 15, 2021 10:45 AM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] PHD2 Multi-Star Guiding

 

I ran across this the other day and it looks like a pretty cool new feature going through the dev cycle for PHD2.

 

 

I ran across it while watching this youtube video about it.

 

 

Thought I would share.

 

Thanks,

Michael


PHD2 Multi-Star Guiding

Michael Gratiot
 

I ran across this the other day and it looks like a pretty cool new feature going through the dev cycle for PHD2.


I ran across it while watching this youtube video about it.


Thought I would share.

Thanks,
Michael


Re: Seeing

Brian Ottum
 

My rig was down for a week, but miracle workers Dan and MJ got me up and running yesterday.  Was shooting all night and my images look very good. 

 

From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of William McLaughlin
Sent: Friday, January 15, 2021 10:01 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Seeing

 

Lots of haze from high clouds the night of 13-14.  Tossed out maybe 75% of the images. Have not checked the data from 14-15 but it did look better as I gathered it.
--

******************
My images can be found at:

and


Re: Seeing

William McLaughlin <IC5070@...>
 

Lots of haze from high clouds the night of 13-14.  Tossed out maybe 75% of the images. Have not checked the data from 14-15 but it did look better as I gathered it.
--
******************
My images can be found at:

and


Re: Seeing

Dan Crowson
 

I preface this with the forecast last night was clear. The ones I’m looking at are showing clearing around 7 PM.


Dan

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

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Bernard Miller
Sent: Thursday, January 14, 2021 5:40 PM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Seeing

 

Hi,

 

I am guessing tonight is another wash out seeing wise. Looks like lots of high clouds just like last night.

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 

 


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Seeing

Bernard Miller
 

Hi,

 

I am guessing tonight is another wash out seeing wise. Looks like lots of high clouds just like last night.

 

Bernard

 

 

http://www.azstarman.net/CDK/index.html

 

 




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Re: Arp 23

Bernard Miller
 

Gregg,

Beautiful color and nice job pulling out the detail in the larger galaxy.

Bernard

-----Original Message-----
From: DarkSkyNewMexico@groups.io On Behalf Of Gregg Ruppel
Sent: Thursday, January 14, 2021 1:38 PM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Arp 23

Hi

Arp 23 consists of NGC 4618 and 4625, both cataloged by Arp as 'one-armed spirals':

http://www.greggsastronomy.com/IMAGES/arp23-LRGB.jpg

NGC 4625 appears to have an almost complete ring, as well as a faint companion just to its east (NGC 4625A?).

1.3X crop
http://www.greggsastronomy.com/IMAGES/arp23-LRGBcrop.jpg

LRGB, 6 hours total exposure from Dark Sky New Mexico.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/







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