Date   

Re: AIC 2019 Photos - including some of the Mach 2

Karen Christen
 

Yes, folks, that’s Astrophysicist Barbie!  She came out this summer as part of a series sponsored by National Geographic (others include Wildlife Conservationist Barbie, Polar Marine Biologist Barbie, etc).  I’ve attached a pic of AP Barbie at AIC.  We altered her Newtonian to be an AP Mak-Cass ‘cause Barbie’s cool like that.

Marj, Roland, and I are all passionate about education for girls, most especially in STEM fields and were delighted when Astro Barbie came out!  She’s not rare at all.  Check out Amazon as a great gift idea for the girls in your life.  For those who want to meet AP Barbie in person, she’ll be joining us at NEAIC/NEAF in April.

Karen, AP

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via Groups.Io
Sent: Thursday, November 21, 2019 10:18 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AIC 2019 Photos - including some of the Mach 2

 

Yes, That's an Astro-Barbie, complete with telescope.

 

Rolando

 

 

 

-----Original Message-----
From: mhambrick563 <mhambrick563@...>
To: main <main@ap-gto.groups.io>
Sent: Thu, Nov 21, 2019 6:57 am
Subject: Re: [ap-gto] AIC 2019 Photos - including some of the Mach 2

OK I have to ask. Is that an Astrophysicist Barbie in image 10/83 ? They must be very rare :>)


--
Karen Christen
Astro-Physics


Re: Precise Polar Alignment by Roland #Polar_Alignment

jimmyjujames
 

 
I do the same thing but in a different order and seldom need a second iteration.
 
First I move star half way back to crosshair with the N-S buttons and 
if on laptop I use a mm ruler to find half way. 
If I go exactly half way the second iteration is not needed.
 
 Then I goto mount and 50-50 chance of going the correct way.
If I go the wrong way no problem the crosshair is my destination not some subjective half way point.
 
The subjective half way point is seldom half way (for me) and causes me to do multiple iterations.
 
Jimmy 


Re: Precise Polar Alignment by Roland #Polar_Alignment

Roland Christen
 

Altitude is really quite simple. Go to a star near the meridian (within an hour), center the star N-S on a crosshair and Recal. Ignore E-W offset. Then via meridian Delay, enter the same star, press GoTo which will flip the scope to the other side. Now simply bring the star 1/2 way to the crosshair via the altitude adjuster and the rest of the way via the N-S buttons (again ignore E-W offset). Press Rcal and you are basically done.

You can of course repeat this by going back and forth a few times repeating the process, but it should be quite accurate the first time. If you have floppy optics it may not converge.

Rolando



-----Original Message-----
From: John Thompson via Groups.Io <jbtgolfer@...>
To: main <main@ap-gto.groups.io>
Sent: Thu, Nov 21, 2019 9:30 am
Subject: [ap-gto] Precise Polar Alignment by Roland

On November 1st 2019 Roland provided some instructions on Precise polar alignment of the azimuth axis. The guidance was straight forward and rarely simple but I have used it to great benefit on three mounts. At the end of the post Roland said his next post would be on Precise Alignment of the Altitude Axis. I have been looking for that next post but can not find it. Has anyone seen it or is it to come? If you read this Roland please let us know. 


Re: [ap-ug] Problems with goto accuracy with Mac1/cp4

Roland Christen
 

Please post your questions in the AP-GTO group.

Your GoTos may not always work even with modeling if you have mirror flop. This kind of thing is not possible to model because it is random in nature.

Rolando



-----Original Message-----
From: Peter Bresler via Groups.Io <PABresler@...>
To: main <main@ap-ug.groups.io>
Sent: Thu, Nov 21, 2019 9:06 am
Subject: Re: [ap-ug] Problems with goto accuracy with Mac1/cp4

I was able to generate the point model, but still am not clear on how to install the file into APCC to make it work? I woujd  appreciate advice on that.

Gotos still were a little off after I just generated the point model file.


Re: Orthogonality question

Roland Christen
 

We have our keypad specialist working day and night to get this done as soon as possible. I will be doing extensive testing next week at my Hawaiian observatory, where the weather is better than here. We will soon have beta software for those who want to do some testing on their end. I want to caution you all that the new features will require the CP4, which has the extended memory and faster computer chips needed for these features.

Rolando



-----Original Message-----
From: John Thompson via Groups.Io <jbtgolfer@...>
To: main <main@ap-gto.groups.io>
Sent: Thu, Nov 21, 2019 8:41 am
Subject: Re: [ap-gto] Orthogonality question

This is exciting, at least for me. I have struggled with the orthogonality issue for many years. Any keypad aid would be much appreciated. Can you give us some solid hope by giving us an approximate release date for the next Keypad update ? 


Re: AIC 2019 Photos - including some of the Mach 2

Roland Christen
 

Yes, That's an Astro-Barbie, complete with telescope.

Rolando



-----Original Message-----
From: mhambrick563 <mhambrick563@...>
To: main <main@ap-gto.groups.io>
Sent: Thu, Nov 21, 2019 6:57 am
Subject: Re: [ap-gto] AIC 2019 Photos - including some of the Mach 2

OK I have to ask. Is that an Astrophysicist Barbie in image 10/83 ? They must be very rare :>)


Precise Polar Alignment by Roland #Polar_Alignment

John Thompson <jbtgolfer@...>
 

On November 1st 2019 Roland provided some instructions on Precise polar alignment of the azimuth axis. The guidance was straight forward and rarely simple but I have used it to great benefit on three mounts. At the end of the post Roland said his next post would be on Precise Alignment of the Altitude Axis. I have been looking for that next post but can not find it. Has anyone seen it or is it to come? If you read this Roland please let us know. 


Re: Orthogonality question

John Thompson <jbtgolfer@...>
 

This is exciting, at least for me. I have struggled with the orthogonality issue for many years. Any keypad aid would be much appreciated. Can you give us some solid hope by giving us an approximate release date for the next Keypad update ? 


Re: Power Supply for Imaging at Remote Locations

Joel Short
 

If you can afford it, LiFePO4 batteries are the way to go.  Traditional lead acid batteries shouldn't be discharged more than 50%; LiFePO4 batteries can be discharged to about 90% so you can a lot of capacity with the same amp hour rating.  They are also significantly lighter and easier to carry around.  I have an 80AH LiFePO4 battery and built a nice box for it based on an Apache 3800 case found at Harbor Freight.  This battery will power my whole setup for about 11hrs and discharge 70%.
joel
LiFePO4 Battery 1.jpg
LiFePO4 Battery 2.jpg
LiFePO4 Battery 3.jpg


On Thu, Nov 21, 2019 at 6:47 AM <mhambrick563@...> wrote:
Hi to All

Up until now, all of my imaging has been dome from my back yard where I have a reliable source of 110 VAC power. I am starting to investigate what is required to run everything off of 12V deep cycle batteries, and I would like to get some input from other users who do a lot of imaging from remote locations (or maybe California :>)) where there is no reliable source of power.

My imaging system is pretty typical of what most users have; Mount (1100GTO), Camera (SBIG STXL16200 with filter wheel), Dew heaters, Laptop, Electronic focuser, and Icron Ranger. I can easily imagine that such a system might require three separate batteries.

How are other users managing this ?


Re: Starting plate solve with APPM, error message

Ray Gralak
 

Hi Peter,

"Image path does not point to a valid file"

I am getting this error message when I start the plate solve on APPM. How do I fix?
I assume you are using your DSLR with SGPro and using PlateSolve2 in SGPro? Is this correct?

If so, can you check that the image is being saved by SGPro as a monochrome FITS image instead of in the DSLR's native RAW format. The error message doesn't appear to be something that APPM generates so I think the plate solver you are using (PlateSolve2?) does not understand the image's format.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): http://www.astro-physics.com/index.htm?products/accessories/software/apcc/apcc
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver


-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Peter Bresler via Groups.Io
Sent: Wednesday, November 20, 2019 8:23 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Starting plate solve with APPM, error message

"Image path does not point to a valid file"

I am getting this error message when I start the plate solve on APPM. How do I fix?


Re: AIC 2019 Photos - including some of the Mach 2

M Hambrick
 

OK I have to ask. Is that an Astrophysicist Barbie in image 10/83 ? They must be very rare :>)


Re: Mach2 update?

Terri Zittritsch
 

Thanks Karen and David for the replies, picture and links.    I'm trying to get everything together ahead of time.      My current setup has wires everywhere (no through mount wiring) and I am looking forward to having a neat and tidy setup.   

Terri


Power Supply for Imaging at Remote Locations

M Hambrick
 

Hi to All

Up until now, all of my imaging has been dome from my back yard where I have a reliable source of 110 VAC power. I am starting to investigate what is required to run everything off of 12V deep cycle batteries, and I would like to get some input from other users who do a lot of imaging from remote locations (or maybe California :>)) where there is no reliable source of power.

My imaging system is pretty typical of what most users have; Mount (1100GTO), Camera (SBIG STXL16200 with filter wheel), Dew heaters, Laptop, Electronic focuser, and Icron Ranger. I can easily imagine that such a system might require three separate batteries.

How are other users managing this ?


Re: Mach2 update?

Suresh Mohan
 

It’s on the website , my bad
Suresh 


On 21-Nov-2019, at 7:39 AM, Suresh Mohan via Groups.Io <drsureshmohan@...> wrote:

Has the final price been determined ?
Suresh


On 21-Nov-2019, at 7:14 AM, Jerome Allison <jallison@...> wrote:

Thanks everyone for the pictures and info.  I was really puzzled by the early pictures which showed a blue box with a lot of I/O connectors, including power and USB, mounted on top.  The box had a bright blue "screen" that looked like it had power, but its cables seemed to disappear into the Dec axis.  I see now that the (unused at the time) PowerPole and USB connectors are at the rear end of the RA axis, as I thought they would be. :)  Plus, I discovered some interesting new hardware, the Pegasus Astro Power Box.


Starting plate solve with APPM, error message

Peter Bresler
 

"Image path does not point to a valid file"

I am getting this error message when I start the plate solve on APPM. How do I fix?


Re: Mach2 update?

Karen Christen
 

Yes, Suresh. The price is $8940.
Karen, AP

On Nov 20, 2019 8:11 PM, Suresh Mohan <drsureshmohan@...> wrote:
Has the final price been determined ?
Suresh


On 21-Nov-2019, at 7:14 AM, Jerome Allison <jallison@...> wrote:

Thanks everyone for the pictures and info.  I was really puzzled by the early pictures which showed a blue box with a lot of I/O connectors, including power and USB, mounted on top.  The box had a bright blue "screen" that looked like it had power, but its cables seemed to disappear into the Dec axis.  I see now that the (unused at the time) PowerPole and USB connectors are at the rear end of the RA axis, as I thought they would be. :)  Plus, I discovered some interesting new hardware, the Pegasus Astro Power Box.

--
Karen Christen
Astro-Physics


Re: Orthogonality question

Roland Christen
 

Hi Jimmy,

Your analysis is correct.

Best way to address orthogonality is with proper shimming of the telescope so that the optical axis points exactly at the pole when the mount is properly polar aligned and the Dec axis is sent to 90 degrees.  This eliminates the polar donut hole that results if the scope is not mechanically orthogonal and allows the scope to point to all positions in the sky.

Next best way is to compensate for orthogonality with software. We do have a method to do this but have not yet implemented it in our keypad. It is fully tested and works very well for 95% of the sky, but of course cannot compensate for the donut hole of the pole. We are working on a simple keypad modeling routine and should have it done for our next update.

The routine is quite simple and straight forward. The result can be used to either adjust the orthogonality, altitude and azimuth mechanically, or it can be simply added to the CP4/5 controller as a model to compensate for orthogonal, altitude and azimuth errors. The first will get you great pointing + better tracking, the second will get you great pointing.

Beyond that we will also implement a simple tracking model in the keypad that measures the drift rate along a constant Dec line for any object which you wish to image. It will allow unguided imaging for that object over the arc that you measured. In my tests with the 17"F8 astrograph on a 1600 encoder mount I measured only 3 points along a 3 hour image arc and was able to track the object with nice round stars in a series of 30 minute exposures.

Neither of these routines is a full sky model such as you would do with APCC-APPM on a fixed observatory mount, rather they are designed for quick setup in the field with minimal effort.





-----Original Message-----
From: jimmyjujames <jimmy_an@...>
To: main <main@ap-gto.groups.io>
Sent: Wed, Nov 20, 2019 7:45 pm
Subject: Re: [ap-gto] Orthogonality question

[Edited Message Follows]
If OE is short for orthogonality error.
 
An Orthogonality error (OE) is only east-west when pointing at zenith or along meridian.
OE is always in line with the counter-weight shaft.
When pointing at NCP with counter-weight shaft pointing down, OE is north-south.
 
 What is an orthogonality error (OE)?
 
 With the counter-weights down and scope pointing at NCP.
 An orthogonality error will cause the scope's viewing point to be above or below NCP.
 
 To the left or right of NCP is not an error.
 You can move Dec to remove any left or right offset.
 
 Rotating RA from east side to west side will move the scope's
 viewing point around NCP tracing out half of a circle around NCP.
 Scope will hit the pier before the other half of circle completes.
 
 Radius of this circle is your (1x) orthogonality error.
 Diameter of the circle is 2 times (2x) your orthogonality error.
 
 If you move the counter-weight shaft to west side and horizontal/level with ground, the scope's 
 viewing point will be either east or west of NCP by (1x) your orthogonality error.
 
 If you move the counter-weight shaft to east side and horizontal/level with ground,
 you will miss NCP by 1x on the other side of NCP.
 
 1x on one side of NCP, meridian flip and 1x off on other side = 2x orthogonality error when
 flipping from east to west side.
 
 If you move scope from NCP to zenith to Dec=0 to SCP, your scope's viewing point will be east or
 west of meridian by your 1x orthogonality error everywhere along that path.
 
 You will have to shim the front or rear ring to bring your viewing point back to NCP.
 
 After minimizing your orthogonality error,
 future meridian flips should result in star in FOV on both sides.
 
 If not then you may have flexure and/or worm needs re-meshing and/or
 something is loose and needs tightening.
 
As always, I may be wrong again.
Jimmy


Re: Mach2 update?

Yves Laroche
 

Hi all,

The Pegasus Astro Ultimate Powerbox v2 is costly but could be a great add-on for the Mach2 and other mounts.  Don't forget that this unit works at very low temp (-40C/-40F).  Another cheaper solution is to buy a power distribution (PD-4 or PD-8) from Powerwerx and the new USB Control Hub (-40C/-40F) also from Pegasus Astro.


Regards,
Yves


Le 20/11/19 20:44, Jerome Allison <jallison@...> a écrit :
Thanks everyone for the pictures and info.  I was really puzzled by the early pictures which showed a blue box with a lot of I/O connectors, including power and USB, mounted on top.  The box had a bright blue "screen" that looked like it had power, but its cables seemed to disappear into the Dec axis.  I see now that the (unused at the time) PowerPole and USB connectors are at the rear end of the RA axis, as I thought they would be. :)  Plus, I discovered some interesting new hardware, the Pegasus Astro Power Box.


Re: Mach2 update?

Suresh Mohan
 

Has the final price been determined ?
Suresh


On 21-Nov-2019, at 7:14 AM, Jerome Allison <jallison@...> wrote:

Thanks everyone for the pictures and info.  I was really puzzled by the early pictures which showed a blue box with a lot of I/O connectors, including power and USB, mounted on top.  The box had a bright blue "screen" that looked like it had power, but its cables seemed to disappear into the Dec axis.  I see now that the (unused at the time) PowerPole and USB connectors are at the rear end of the RA axis, as I thought they would be. :)  Plus, I discovered some interesting new hardware, the Pegasus Astro Power Box.


Re: Mach2 update?

 

Thanks everyone for the pictures and info.  I was really puzzled by the early pictures which showed a blue box with a lot of I/O connectors, including power and USB, mounted on top.  The box had a bright blue "screen" that looked like it had power, but its cables seemed to disappear into the Dec axis.  I see now that the (unused at the time) PowerPole and USB connectors are at the rear end of the RA axis, as I thought they would be. :)  Plus, I discovered some interesting new hardware, the Pegasus Astro Power Box.

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