Date   

Re: Sadr Region - HA

Dan_Paris
 

Very nice Bill, it seems that your collimation is spot on !

Dan


Re: Iris Nebula

Dan_Paris
 

Spectacular image Bill with lots of signal !

regards,

Dan


Re: #ASCOM_V2_Driver alpaca move rate #ASCOM_V2_Driver

fantei@...
 

Thank you for your help Ray,
i will contact Ascom for more details.
yan

 


Another failed meridian post - APCC, SGP and AP900 Mount

John Kazanas
 

Hi guys,

Seem to be experiencing some ongoing issues with meridian flips - Using SGP 3.1.0.544, APCC Pro V. 1.8.0.9 and and AP900 mount with CP3 gear.

Last night could not do a meridian flip (around 23:50) or get to a new object (around 3:30 which also required a meridian flip) which I found really odd.

I am not sure if I have mucked up the APCC settings and have these wrong in the meridian tab, but have followed the instructions on the AP video for SGP although I am using an older version of APCC.

Attached are links to two log files - AP ASCOM and SGP and hoping that someone can shed some light to the whole thing for me.

https://drive.google.com/file/d/1CFkVQN3x0kJx0ZRMUp-2HEy9huYNW0US/view?usp=sharing

https://drive.google.com/file/d/1zfNUmfQ3bbWis1xbYhePOsXKaS5zpxk_/view?usp=sharing

I am not prepared to upgrade to the latest APCC version as there is no need, and in fact I am thinking that I can simply use SGP and the latest V2 driver if that avoids any more conflict between APCC and SGP.

I previously had no issues with meridian flips but the current version of SGP might be the issue.

Clear skies,
John K.





 


Re: Problem with meridian flip #Mach2GTO #APCC

 

David, wow that's a great widefield image. so much detail! well done

Brian


Re: quartz crown and plate glass

Christopher M
 

My apologies - I posted this in the GTO group and not the regular group


quartz crown and plate glass

Christopher M
 

In a recent post (87010) Roland C mentions that Linwood's Celestron C11 optics is made with "normal" glass.
"Do you find the C11 to need a lot of focusing with temperature change? It would seem to me that would be the case since the tube is aluminum and the optics are normal glass, not quartz or zero expansion materials. Maybe where you are in Florida the temps are pretty stable?"

While I think I understand the concept of low or no thermal expansion glass as used for mirrors (fused quartz, zerodur, etc) reduces surface distortions during temperature changes, I noticed that AP's 254mm MC uses crown glass for the corrector plate (and fused quartz for the mirror).  Would not crown glass have an optically significant coefficient of thermal expansion, ie introduce some distortions during cool down?  For that matter, would not any of our refractors do the same to some degree?  Would lenses or correctors made of low thermal expansion optical material like quartz glass (?) not be better in this regards?  Or is it a matter of trade-offs again?  I do know that a Maksutov corrector is a very large piece of deeply curved glass, so proably difficult to make.  I'm just curious
Thanks
C


Re: Problem with meridian flip #Mach2GTO #APCC

David Johnson
 

Thanks


SH2-112

Mike Dodd
 

Resend. Sorry, I forgot change the subject line.

We had a few clear and steady nights here in central Virginia, and I managed to get 13 hours of Ha and RGB on Sharpless 112.

<http://astronomy.mdodd.com/nebulae-32.html>

Comments are welcome. Is there too much reflected blue from the star? I tried to keep it from overpowering the nearby red.

--- Mike


Re: Iris Nebula

Bill Long
 

Thanks Andrea!



From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Andrea Lucchetti <andlucchett@...>
Sent: Tuesday, July 5, 2022 1:59 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula
 
Much better! 
Very nice

Il giorno lun 4 lug 2022 alle 03:31 Bill Long <bill@...> ha scritto:

I fully reprocessed the data


Much happier with this result. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of AaronW <aaron.wilhelm@...>
Sent: Sunday, July 3, 2022 3:36 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula
 
Beautiful.  Would never have guessed this is only 3 hours.  What Bortle scale are these skies?  I’m trying to figure out what’s possible for me in broadband from Bortle 7…

On Jul 3, 2022, at 10:53, Bill Long <bill@...> wrote:


Hi Friends,

While I am trying to step away from backyard imaging, I did some testing of gear the other night and got about 3 hours of data on the Iris Nebula in my LP rats nest of a backyard. 


I used the Mach 2 and my Takahashi Epsilon reflector scope. Unguided with APCC. I used the high gain mode on the camera, so the center star is completely blown out. I was trying to get the dust to pop though, and I think that came out pretty well.

Have a look. I am working on my remote site now, but will from time to time share some of my test data in the yard. 

Take care friends.

-Bill 


Re: #ASCOM_V2_Driver alpaca move rate #ASCOM_V2_Driver

Mike Dodd
 

We had a few clear and steady nights here in central Virginia, and I managed to get 13 hours of Ha and RGB on Sharpless 112.

<http://astronomy.mdodd.com/nebulae-32.html>

Comments are welcome. Is there too much reflected blue from the star? I tried to keep it from overpowering the nearby red.

--- Mike


Re: Iris Nebula

Andrea Lucchetti
 

Much better! 
Very nice

Il giorno lun 4 lug 2022 alle 03:31 Bill Long <bill@...> ha scritto:
I fully reprocessed the data


Much happier with this result. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of AaronW <aaron.wilhelm@...>
Sent: Sunday, July 3, 2022 3:36 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula
 
Beautiful.  Would never have guessed this is only 3 hours.  What Bortle scale are these skies?  I’m trying to figure out what’s possible for me in broadband from Bortle 7…

On Jul 3, 2022, at 10:53, Bill Long <bill@...> wrote:


Hi Friends,

While I am trying to step away from backyard imaging, I did some testing of gear the other night and got about 3 hours of data on the Iris Nebula in my LP rats nest of a backyard. 


I used the Mach 2 and my Takahashi Epsilon reflector scope. Unguided with APCC. I used the high gain mode on the camera, so the center star is completely blown out. I was trying to get the dust to pop though, and I think that came out pretty well.

Have a look. I am working on my remote site now, but will from time to time share some of my test data in the yard. 

Take care friends.

-Bill 


Re: Ocean-side location corrosion precautions

Steve Wilkins
 

Understood, thanks Roland


Re: Thanks to Mike, Roland and others that reached out to me this 4th of July weekend

Karen Christen
 

Holy frijoles, Batman, there are some nice images over the last few days from you guys!  Thanks for sharing, Steve!

Karen

AP

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of steven ho
Sent: Monday, July 4, 2022 2:18 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Thanks to Mike, Roland and others that reached out to me this 4th of July weekend

 

It speaks volumes to the dedication of the AP family. The situation has been address and I thank you all.

I don't post my stuff here often enough so here's an image of the Tulip Nebula in NB SHO - https://astrob.in/a4bohj/C/
Thanks to the AP1600AE for carrying the heavy CDK17 load.

All the best 
Steve


--
Karen Christen
Astro-Physics


Re: M27 in LRGB + SHO (Dumbbell)

Karen Christen
 

Dang, Linwood.  That’s really striking.  Great work.

Karen

AP

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of ap@...
Sent: Monday, July 4, 2022 11:39 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] M27 in LRGB + SHO (Dumbbell)

 

While I'm here posting, here is one I put up yesterday and welcome suggestions and criticism. 

Full size here:  https://www.astrobin.com/92m59x/

All credit to the AP1100AE for the round stars of course.

I love getting data across all filters, it shows so much hidden detail viewed separately; I absolutely HATE trying to turn it into images. Picking colors, blending colors just drives me insane.  After a while I become a sort of color blind zombie just trying pallets at random.  This was after taking a day off and changing approaches. 

There is about 18 hours of data at 2800mm/F10 through all 7 filters (no luminance).  The stars are RGB only, the red on the bright part of the nebula comes mostly from the RGB (blended after stretching with square of value), and the halo and blue/cyan mostly from the NB colors, which were combined in a ForaxX type formula.  I first tried blending Red + Sii, Green + Ha, etc. but that did not work well, so I built the BB and NB images separately and combined.  I'm still not happy with the powder blue color but making it darker or more saturated just seemed to make it worse.   I'm even more unhappy with the dark part of the background which is blotchy from combing narrow and broad band backgrounds, but attempts to fix it made star replacement look even more strange. 

As I said, criticism and suggestions more than welcome, here or on Astrobin. 

Linwood


--
Karen Christen
Astro-Physics


Re: Iris Nebula

Bill Long
 

Thanks Karen. That Epsilon is a photon vacuum.



From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Karen Christen <karen@...>
Sent: Tuesday, July 5, 2022 9:22 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula
 

Wow, that’s gorgeous, Bill.

Karen

AP

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Bill Long
Sent: Sunday, July 3, 2022 8:31 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Iris Nebula

 

I fully reprocessed the data

 

 

Much happier with this result. 

 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of AaronW <aaron.wilhelm@...>
Sent: Sunday, July 3, 2022 3:36 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula

 

Beautiful.  Would never have guessed this is only 3 hours.  What Bortle scale are these skies?  I’m trying to figure out what’s possible for me in broadband from Bortle 7…



On Jul 3, 2022, at 10:53, Bill Long <bill@...> wrote:



Hi Friends,

 

While I am trying to step away from backyard imaging, I did some testing of gear the other night and got about 3 hours of data on the Iris Nebula in my LP rats nest of a backyard. 

 

 

I used the Mach 2 and my Takahashi Epsilon reflector scope. Unguided with APCC. I used the high gain mode on the camera, so the center star is completely blown out. I was trying to get the dust to pop though, and I think that came out pretty well.

 

Have a look. I am working on my remote site now, but will from time to time share some of my test data in the yard. 

 

Take care friends.

 

-Bill 

 


--
Karen Christen
Astro-Physics


Re: Iris Nebula

Karen Christen
 

Wow, that’s gorgeous, Bill.

Karen

AP

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Bill Long
Sent: Sunday, July 3, 2022 8:31 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Iris Nebula

 

I fully reprocessed the data

 

 

Much happier with this result. 

 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of AaronW <aaron.wilhelm@...>
Sent: Sunday, July 3, 2022 3:36 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Iris Nebula

 

Beautiful.  Would never have guessed this is only 3 hours.  What Bortle scale are these skies?  I’m trying to figure out what’s possible for me in broadband from Bortle 7…



On Jul 3, 2022, at 10:53, Bill Long <bill@...> wrote:



Hi Friends,

 

While I am trying to step away from backyard imaging, I did some testing of gear the other night and got about 3 hours of data on the Iris Nebula in my LP rats nest of a backyard. 

 

 

I used the Mach 2 and my Takahashi Epsilon reflector scope. Unguided with APCC. I used the high gain mode on the camera, so the center star is completely blown out. I was trying to get the dust to pop though, and I think that came out pretty well.

 

Have a look. I am working on my remote site now, but will from time to time share some of my test data in the yard. 

 

Take care friends.

 

-Bill 

 


--
Karen Christen
Astro-Physics


Re: How feasible is tandem imaging with AP1100 with or without AE and 2 1000mm refractors with ~0.8"/px image scale?

Dean Jacobsen
 

On Tue, Jul 5, 2022 at 08:39 AM, Karen Christen wrote:

Pretty cool little rollaway observatory shed thingy, Peter.  Don’t think I’ve seen one like that before.

Karen

Yes, a very innovative adaptation.  That is probably something I could adapt for my back yard.
 
--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: 400GTO

Roland Christen
 

I would not use this on astronomical equipment.

Rolando

-----Original Message-----
From: Chris White <chris.white@...>
To: main@ap-gto.groups.io
Sent: Mon, Jul 4, 2022 6:53 pm
Subject: Re: [ap-gto] 400GTO

This is the grease I have on hand: https://www.duniway.com/images/_pg/datasheet-DC-150.pdf

It is Dow Corning High Vacuum Grease. 

Silicone Base and rated for -40C to 204C degrees.

I remember reading something from Roland about avoiding sulfur, and I dont see that this contains any.

--
Roland Christen
Astro-Physics


Re: Ocean-side location corrosion precautions

Roland Christen
 

All boards in the AP mounts are already conformal coated. Do not add more willy nilly since you can mess up the connector pins!

Roland

-----Original Message-----
From: Brian Valente <bvalente@...>
To: main@ap-gto.groups.io
Sent: Mon, Jul 4, 2022 6:43 pm
Subject: Re: [ap-gto] Ocean-side location corrosion precautions

Hi Steve

I had to deal with this recently. One of the things I added was conformal coating to the circuit boards/electronics. It shields the boards from corrosion


On Mon, Jul 4, 2022 at 3:09 PM Steve Wilkins <stevewilkinsmail@...> wrote:
Yes that was my understanding. Good suggestion on the stainless, thanks, I do see some signs of corrosion on the small level on the baseplate; not too worrying as it’s not core to the mount’s function, looks like it might be plated steel. 


--

--
Roland Christen
Astro-Physics

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