Close Approach of 2015 RN35

[bigmasterdrago]

Correct. I saw your thread and very good advice. Thanks. I've not run across that issue yet. When I want to run an ephem for a close passer that may be in my realm of opportunity, I've learned, with SkyTools to always use the elements supplied by Horizon osculating at that specific date (near close pass). Otherwise it will not take into account the perturbations imposed by the Earth-Moon system.