2021-11-16, 12:08 AM
Greg, you struggled to make me aware/understand this process many moons ago. Very long ago. I finally got it and have been using the procedure you outlined for me in using the creation of osculating elements from Horizons for a distinct hour of observation. This has worked marvelously ever since. And just to reiterate, doing it this way will allow the creation of an ephemeris and chart plot that matches those positions gleaned at Horizons. Since I'm a visual star hopper observer, I've needed good paper charts at the scope. Thanks for that. Thanks for your new explanation.