2022-09-21, 04:59 PM
Hi BMD,
Do you know the procedure that MPC follows when they produce their 'NEAs at Today's Epoch' data file? They wouldn't just precess their elements for 2022 Aug 9 00:00 UT to the current date would they? The new discoveries wouldn't have elements for the standard date, although they could generate them easily enough.
Here's a description of the perturbing bodies that the MPC considers for their NEO orbit calculations: Perturbing Bodies (minorplanetcenter.net)
They consider a lot of objects. I don't know why MPC & JPL give different positions, unless it's down to different elements.
Phil S.
Do you know the procedure that MPC follows when they produce their 'NEAs at Today's Epoch' data file? They wouldn't just precess their elements for 2022 Aug 9 00:00 UT to the current date would they? The new discoveries wouldn't have elements for the standard date, although they could generate them easily enough.
Here's a description of the perturbing bodies that the MPC considers for their NEO orbit calculations: Perturbing Bodies (minorplanetcenter.net)
They consider a lot of objects. I don't know why MPC & JPL give different positions, unless it's down to different elements.
Phil S.