2021-09-30, 02:07 AM
(This post was last modified: 2021-09-30, 02:49 AM by bigmasterdrago.)
It's clear from your search that the mag parameters, as Technoking mentioned, is what may have caused the loss of those two rocks. But when using Horizons or other ephemeris generating software, they were within the mag zone. I did notice the inclusion of those 2010 rocks that only had a 10-14 day arc in WISE data. Again lost rocks that I only found in a DBPS but no other. Thanks both of you.
And one other mention. Those 2010 rocks were "no matching bodies found" using Horizons, Lowell, MPC, etc.
Generally, I find the rapid brightness change caused primarily by illumination %. Although tonight 2021 RF2 remains near mag estimate 17.6 from 22:00CDT until dropping below my horizon after 3am after a close pass for me ~00:30 . Beginning high in the south and dropping to 30° in the SW. Phase% changes very little.
On the other hand, 2021 RM5 climbs out of the SE at mag ~19 peaking ~40° @~2am. Again remaining at a steady 93% phase. Both of these rocks are moving under 25"/min and beyond my reach visually.
And one other mention. Those 2010 rocks were "no matching bodies found" using Horizons, Lowell, MPC, etc.
Generally, I find the rapid brightness change caused primarily by illumination %. Although tonight 2021 RF2 remains near mag estimate 17.6 from 22:00CDT until dropping below my horizon after 3am after a close pass for me ~00:30 . Beginning high in the south and dropping to 30° in the SW. Phase% changes very little.
On the other hand, 2021 RM5 climbs out of the SE at mag ~19 peaking ~40° @~2am. Again remaining at a steady 93% phase. Both of these rocks are moving under 25"/min and beyond my reach visually.