dwc Posted February 22, 2022 Share Posted February 22, 2022 Last week I managed a perfectly average set of images of M42. I used my C9.25/NEQ6, Canon 1100D with APT, guided by ASI120MC/mini guidescope with PHD2 using the onboard capability (ASI direct connected to guide port). Everything worked fine, from the GOTO finding the target, to PHD2 guiding on a random star. Tonight I decided to try to get platesolving and GOTO to work in APT, which requires connecting APT to the mount, and including connecting up Stellarium as well. I’d previously tried this using the various simulators available, and had managed to follow a couple of YouTube tutorials that demonstrated using the same simulators. But, in short, I just couldn’t get any of the programs to work properly together, or to give sensible results. I couldn’t even get PHD2 to successfully find a star to guide. I’m sure I’ve just missed something basic that’s causing the discrepancies, but I can’t figure out what. I was using the ASCOM Telescope Hub, and connecting APT, PHD2, and Stellarium. All the components seemed to think they were pointing at different locations. In the end I went back to just trying to get NEQ6 and EQASCOM to agree on where they were pointing, and couldn’t make sense of the discrepancy. I checked the Lat/Long in the handset and in EQASCOM, they are the same. Here’s what I see. I did a GOTO M44 using the handset, verified that’s what I could see through the eyepiece, checked the Current Position, then put the handset into Direct Mode and connected EQASCOM. The handset is pointing at RA 08h 41m EQASCOM thinks it is pointing at RA 08h 51m. They agree on DEC. Stellarium shows the same as EQASCOM (obviously) and although I didn’t capture it, pointing left of M44 by (I guess) the 10m discrepancy. What am I missing here? I assumed that EQASCOM would take the information directly from the mount. Quote Link to comment Share on other sites More sharing options...
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