Date   

Re: Challenge object: Tiny faint galaxy grouping in Ursa Major

Steve Armen
 

That is nice sensitivity with the big Cassegrain. 

Never have seen a satellite look like that. 

Another great target for the big 17" Cass would be Andromeda's Parachute - gravitationally lensed quasar. Not the right time of year just yet. In June in your area will be up late ~ 2am. I've goofed around attempting to image it with my idk10 silly, not enough focal length or mirror.

RA: 1 : 47 : 9.53 
DEC: 46 : 30 : 35


Challenge object: Tiny faint galaxy grouping in Ursa Major

Roland Christen
 

Wanted to see how faint I could go here at my light polluted industrial park. Local amateurs pointed out a tiny grouping of faint galaxies that they haven't been able to get much info on them or any detailed images. I tried with my 130EDF, 10" F8 Mak-Cass and finally with my 17" F8 Astrograph. Main limitation is the amount of background sky brightness here due to severe light pollution, but I'm always up to a challenge. The galaxies showed up in a wide field image in my 130GTX as a tiny little group, showed some small amount of detail in the 10", but it took the 17" to finally reveal some better detail. 
Star resolution last night was 1.5 arc sec FWHM and guiding was under 0.2 arc sec FWHM for the 20 minute exposures. Had some horrific satellite trails that had to be removed, otherwise everything went fairly smoothly.

https://www.astrobin.com/ynxjhk/0/


I had one satellite trail that resembled a corkscrew, never have I seen anything like that. See below.


--
Roland Christen
Astro-Physics


Re: Too Windy to Go Long?

Terry Martin
 

Hi Pete,

It seems that every time I run the NINA tool, and it's easy to run and I can get, what it tells me, very good polar alignment (it will be within small seconds), but when turn on PHD2 guiding, PHD2 suggests that I should perhaps try getting better polar alignment as I'm out by several minutes.  Maybe I'll try running the NINA tool a couple times.

Terry


Re: Too Windy to Go Long?

Pete Tuson
 

Depending on your requirements you can just run the Nina tool once or twice and it will get you very good alignment. You don't need much more than that, and it doesn't need view of Polaris / Southern cross. It will work on whatever bit of sky you are pointing at. 


On Wed, 27 Apr 2022, 21:58 Terry Martin, <terry@...> wrote:
Thanks Dean,

I don't have the RAPAS, so I've been polar aligning using NINA's 3 point polar alignment tool.  It's an easy tool to use, I'm not so sure on how well it's working; I will have to give SharpCap a go.

Terry


Re: Too Windy to Go Long?

Terry Martin
 

Thanks Dean,

I don't have the RAPAS, so I've been polar aligning using NINA's 3 point polar alignment tool.  It's an easy tool to use, I'm not so sure on how well it's working; I will have to give SharpCap a go.

Terry


Re: Too Windy to Go Long?

Dean Jacobsen
 

Hi Terry,  I use the RAPAS first to get close then the polar alignment tool in SharpCap to finish.  Perhaps overkill if doing a pointing/tracking model anyway but it doesn’t take very long to use the SharpCap tool.
--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: Too Windy to Go Long?

Terry Martin
 

Thanks Dean,

Since last November I've had two clear nights (non-consecutive) and I spent both nights trying to remember how to use everything, with not a lot of success.  I also have a Mach2 and I agree that the mount is fantastic.  Over the winter I had the mount set up inside, so I used the time (I had lots of it) and using simulators to learn how to do mapping runs, horizon limit, and meridian limits in APPC/APPM.  Now I need some clear skies to give it real go.

One more question, if you don't mind.  How do you do your polar alignment?

Terry


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Ray Gralak
 

Shailesh,

Ray the Meridien Limits checkbox in APPM has no impact. If I had not relocated my CP5 and left it on the west
side of the pier, it would definitely have collided with the pier/CP5 causing a motor stall. Perhaps something to
investigate.
Can you provide more details? The meridian limits checkbox allows for mapping counterweight-up points by making the last slew in RA only to counterweight-up positions.

I assume this is for mapping counterweight up points with a properly configured the limits on both sides of pier? (which you should have done with the Meridian limits explorer),

It might be helpful if you could share a screenshot of the APPM mapping-points window.

-Ray


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Shailesh Trivedi
 

Thank you all for your feedback. I relocated my CP5 to the south side of the pier as Dean and Greg have. 

After that, I was successfully able to run a 200+ point APPM model.

Ray the Meridien Limits checkbox in APPM has no impact. If I had not relocated my CP5 and left it on the west side of the pier, it would definitely have collided with the pier/CP5 causing a motor stall. Perhaps something to investigate.

Shailesh


Re: Too Windy to Go Long?

Dean Jacobsen
 

Hi Terry, thanks for taking a look.

Yes, it was a temporary setup for the night.  The Mach2 on a Losmandy HD tripod.

I just create a small three line mapping run with APPM for that night's target.  In this case NGC 5005 is at +36 declination so I set up the declination spacing at 2 degrees and set the minimum declination at +34 and the max. declination at 38.  APPM will create three dec lines.  For the FSQ I set the RA spacing at 7 degrees.  I always set the Min Altitude at 45 and so I ended up with a map of 49 points which will run in about 1/2 an hour.  That's it.  It works marvelously well with the FSQ at 530 and 360 mm focal length.  For my longer focal length scope - 1000mm - I have been just using more RA points so I might set the RA spacing up at 6 or 5 degrees.

The AP mounts with the absolute encoders and the software are just fantastic to use. 

Good luck!
--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: Too Windy to Go Long?

Terry Martin
 

Very cool Dean.  Was this a temporary setup?  Did you create a sky model or Dec-Arc model for the imaging session?

Terry


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Dean Jacobsen
 

That is where my CP5 goes too.  My pier extension isn’t as tall though.
--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Greg McCall
 


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Shailesh Trivedi
 

Ray,

Honestly, I have not checked. I will double-check it.

@Greg I will try to image it and attach it here.

@Roland let me see if there is an available slot to screw the CP5 holder.

Shailesh


Re: Too Windy to Go Long?

Dean Jacobsen
 

Here is a link to an annotated version:

https://www.astrobin.com/full/c2dyh3/D/

--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Too Windy to Go Long?

Dean Jacobsen
 

This is what happens when the weather forecast says it is going to be breezy overnight:

https://www.astrobin.com/full/c2dyh3/C/

The original plan was to image NGC 5033 and NGC 5005 last weekend.  Both would have fit nicely in the field of view of my 1000mm fl f/6 Newtonian.  But the National Weather Service said it was going to be breezy.

Time to execute Plan B.  Packed up the short refractor instead and managed to add IC 4182 to the field.  ... and, you guessed it, no wind.

I will try to get a higher resolution shot of NGC 5033 and NGC 5005 again next year.

Imaged with an ASI2600MC Pro OSC camera + an f/5 530mm focal length refractor.   The camera and optics were expertly carried by the Mach2.  69 x 240 second unguided exposures.

--
Dean Jacobsen
Astrobin Image Gallery - https://www.astrobin.com/users/deanjacobsen/


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Roland Christen
 


Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor.
This depends on the camera you plan to use. If it is full frame 35mm, the flattener is the best solution. If you have an APS-C format (ZWO 2600), you can use the .8X Telecompressor to produce a wider field than the flattener, with good corner star shapes.

Rolando

-----Original Message-----
From: Don Anderson via groups.io <jockey_ca@...>
To: main@ap-gto.groups.io
Sent: Tue, Apr 26, 2022 12:18 am
Subject: Re: [ap-gto] Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 

--
Roland Christen
Astro-Physics


Re: APCC issue? Mach2 motor stall error when running APPM #Mach2GTO

Ray Gralak
 

Hi Shailesh,

 

> I redefined my Meridian Limits for my new scope and long imaging train but this does not matter to APPM as it

> does not use the meridian limits (why?)

 

Is the checkbox labeled “Use APCC Meridian Limits” on the "Measurement Points" tab not working? (See screenshot):

 

 

-Ray


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Harley Davidson
 

Thank you Don. Congratulations on getting the 92. It's a great scope.

Here is the link for the DOVEDV10:
https://www.astro-physics.com/dovedv10

tony

On 4/26/2022 1:18 AM, Don Anderson via groups.io wrote:
Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 


Re: Video on other uses for Astro-Physics Dovetail Saddles & Dovetail Bars

Don Anderson
 

Great Video Tony! I just got notified about my name being drawn for a 92 Stoaway! Just going through the store picking my mounting plates so I can fit it to my AP900GOTO. Also trying to decide on 
whether to get the field flattener or the .8X Telecompressor. Can't afford both right now. I don't see the DOV DV10 saddle plate on the AP website. Will have to call George tomorrow.
Don
 

1941 - 1960 of 88034