I still have my Pickett rules, A pocket size 6" and two 12", all in leather cases. Surprisingly, after more than fifty years I still remember how to use most of the scales! Richard

When I set up a target in SGP, I'll enter RA and DEC coordinates for the center of the image, as well as rotation angle of the frame. I start the evening with a "closed loop slew" to use TSX

Which mount would that be? Periodic error has nothing to do with Dec, only RA. If your mount requires Dec corrections, that indicates your polar alignment should be adjusted. Dec adjustments should

I have this mount and use it for imaging. Balance seems to be really important but a bit difficult to do. I have backlash of 2 seconds in Dec and when I image with Voyager, it takes a couple of starts

Fantastic! No imaging planned. Thank you! JimP Get Outlook for iOS

Backlash will be on the order of arc second, so it realistically won't have any effect on pointing. It can also be mitigated on that mount with careful adjustment, however it is really only important

Thinking about purchasing an AP 600 E GOTO for visual observations of double stars with my AP 155 F/7. Everything about the Mount sounds good except the seller says it has significant declination

I just let SGP handle the meridian flips on its own (I have these settings disabled in APCC, too lazy to set them up right), it works perfect every time with a Mach2 on a single attempt. The only

SGP sometimes needs three slews to get on target. I have found in the past that my scope did in fact due three meridian flips when trying to plate solve.

Hi Luca, Can you clarify? Are you saying that SGPro needs to slew two or three times in the course of platesolving a new target, and in the process of doing this APCC is doing a pier flip and

Thanks, Ray. So if I read your statement correctly, there is no special setting in APCC that will avoid safety slews within the meridian limits but if the slew issued is close enough in Dec, then APCC

I think the note above Von Braun’s slide rule is appropriate. Recall the movie sequence in APOLLO-13, Tom Hanks is asking mission control to double check his gimbal angle corrections. The scene

Luca, If the SGPro move is 0.5 degrees or less in Declination then there will be no safety slew. -Ray

Ray, How would I set up APCC so that slews within the East limits with CW up from SGP do not invoke safety slews? Is it in the APCC manual? Thanks, Luca

Good find. Nothing like sleeping to clear your mind and find the answer.

Having grown up during the Mercury launches onward, my childhood hero became Wernher von Braun. During a 2016 visit to the Cosmosphere Space Museum in Hutchinson, Kansas, I spotted a slide rule in a

Thanks Roland. So I’ll assume that re-meshing has no effect on PE then. Good to know. Keith

Yes, that is correct. Rolando

Thanks. “ASCOM” didn’t show up as an option, so I installed the MGBoxV2 ASCOM driver. I could swear that I installed it before, but I guess I didn’t. Anyway, it appears to have fixed it.