2025-09-28, 11:31 PM
Hi Dennis,
Does the mount allow you to input your LAT & LON? If not, then it can't use anything but geocentric calculations. That's sort of a short coming, but it likely only matters for these close approaches where parallax becomes important. I've noticed that for really close approaches, the NEO's track is different for different observing locations. Are you using MPC's Elements at Today's Epoch or are you downloading elements from HORIZONS?
Your second image looks great too. Thanks for sharing.
Phil S.
Does the mount allow you to input your LAT & LON? If not, then it can't use anything but geocentric calculations. That's sort of a short coming, but it likely only matters for these close approaches where parallax becomes important. I've noticed that for really close approaches, the NEO's track is different for different observing locations. Are you using MPC's Elements at Today's Epoch or are you downloading elements from HORIZONS?
Your second image looks great too. Thanks for sharing.
Phil S.