Re: Dec Arc APPM mode: any l best practices for field set up

Howard Hedlund

Hi Andrea, for portable setups, the APCC Dec Arc feature is amazing!  It is perfect for your situation. 


I would definitely run 3 arcs if you can spare the time – one right on the target declination, and two more – one a couple degrees north, and the other a couple degrees south of your target dec. 


As for the RA density, I would experiment a little.  You presently do 2 arcs each with 10 or so points giving 20 total.  3 arcs totaling between 25 and 30 should rock!


Mag. 7 or Better Skies!


Howard Hedlund

Astro-Physics, Inc.

AP Phone: 815-282-1513

Direct Phone:  815-315-7015

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From: <> On Behalf Of Andrea Lucchetti
Sent: Thursday, September 30, 2021 6:16
Subject: [ap-gto] Dec Arc APPM mode: any l best practices for field set up


Hi, the new functionality is now more mature and I assume some of you have some good data to share.

I usually shoot one subject per night.
Given the declination, what is the best combination of :

-number of dec arcs
-total number of points
-RA spacing

my present strategy is to run 2 arcs one degree north /south of the object declination for a total of 20 points.
But I wonder if there is a better approach. I think I can increase the number of total points while still investing a reasonable amount of time.
it is better to increase the number of points in the two arcs or may be have one middle arc running on the object declination?

Also, Someone recommended a new feature to easily model these points: I think that it would be very useful for people with a nomad set up.

Thank you,

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