Friday, November 09, 2012

learned more about Orion

Read Unk's article on the Orion mount... Share some words with Manuel.

"Apparently the problem was me, not the SynScan. Choosing alignment stars for this hand control is a different proposition compared to what it is with the NexStar. With the Celestron firmware, 'good stars' are usually stars as far apart in azimuth as possible. The mount chooses the stars for you, anyway, so unless they are blocked by an obstacle and you have to pick alternates, it’s a no-brainer.

"SynScan is different. The azimuth separation between the two initial stars matters somewhat, but what really makes a difference is R.A. For a good go-to alignment, the first two stars should be separated by at least several hours of Right Ascension. Third star? Not as critical, but it should be on the other side of the Meridian and between 30 and 70 degrees declination north or south.

"The real kicker? The SynScan presents you with a list of alignment stars. B-U-T these are not given in order of how good they are. It is just a list of possible stars, and the first two in the list may be the WORST alignment choices for your time and date. You have to scroll through this list and pick three stars that meet the above requirements."

As I suspected.

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