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General Astronomy => Beginners Forum => Topic started by: ndesevtenzio on December 24, 2017, 01:44:18 AM

Title: How do various GOTO alignment techniques impact GOTO and tracking performance on
Post by: ndesevtenzio on December 24, 2017, 01:44:18 AM
Hello Everybody,

I've been looking around the internet trying to find an answer to a question I have regarding GOTO equatorial mounts.  I own an iOptron SmartEQ Pro with a little, light refractor usually mounted onto it.  This mount comes with two delegated processes, a "one celebrity align" plus a "multi-star align".  The former just uses one celebrity to align the bracket, while the latter could utilize many celebrities.  I believe, in doing my research before making my purchase, that many GOTO mounts contain similar patterns.

What I'd like to know is this: how does the use of a single celebrity and multi-star alignment impact GOTO pointing (the capability to precisely slew to and stage at a target in the sky) and monitoring functionality (the ability to keep the target centered in the eye piece)?  Or, put another way, how does using more celebrities affect GOTO and monitoring functionality?  Assume a "normal" level of polar alignment error for a beginner.  My intuition is that the more stars added to the bracket's internal pointing model, the more precise the GOTOs will be.  I don't have any intuition yet on how it would affect monitoring, however.

This leads to a few more followup questions:
What is the objective of a one star alignment if 2 (or more) celebrity alignment is obviously better (assuming it is)?
Does the quality of the internal pointing model affect the monitoring performance (the ability to stay centered on a goal) on a GEM?
Can a high quality pointing model (with, say, six well-centered celebrities) compensate for less than stellar polar alignment or collimation of the extent along with the mount's polar axis?  Either w.r.t. GOTO accuracy or monitoring functionality?
Thanks!
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