|
Ok, I now understand.
Are you using an off axis guider or separate guidescope? If its the latter then finding a guidestar is a breeze. What is important and should be the primary focus is to center/compose the object on the main imaging chip. Don't worry about the guide chip at the moment. A good pointing model using maxpoint will get you close, but to center the object with sub arcsecond precision repeatedly you'll need to plate solve. The smaller the imaging chip the more valuable the pointing model/plate solve functions are. In fact for remote imaging, it is near impossible to operate without these two functions.
Note, the accuracy of the pointing model is not only going to be limited by your mounts capabilities, but also the optical design. SCT's typically have inherent mirror flop. A pointing model can handle this reasonably well as it maps objects across the sky. However, if the mirror does not flop or flex the same amount every time its a specific area of the sky then accuracy issues will occur. You'll need to work out what works best for your equipment configuration.
Nudging? Why do you need it? If you are plate solving the object or coordinates you enter will be centered on the chip with sub arcsecond precision every time. There will be no need to nudge. If you are nudging because you want to find a suitable guidestar for your off axis guider, then this opens a different discussion around planning the imaging session by enabling FOV indicators.
I'm afraid I've only used CDC a few times so can't comment on its capabilities. I haven't done this before, but try connecting POTH to maxpoint, then CDC to POTH. I've found the two hubs conflict, but it might work in your situation.
|