2021-08-16, 12:53 PM
Phil,
Did you get it plate solved? I think that https://nova.astrometry.net/ will do it for you.
Since Horizons has the H=99.99 as does Lowell but when doing the single minor planet download in ST, it seems to be 16.60, I thought I would experiment. Horizons does not have "Close Approach Data" for 2010 CA261 and has a "Condition Code" = 9 (highly uncertain orbit). So I played around. Looks as if from my location, the rock is close (0.026AU or 10LD) and well placed (180az, 49° up @2:27CDT) in the early morning hours (5-9 UT) on Sept. 1. It's 98% illuminated and the Moon is under 10° up in the ENE. Similar conditions the last few days of August but slightly more Moon interference. Run it for your location.
Did you get it plate solved? I think that https://nova.astrometry.net/ will do it for you.
Since Horizons has the H=99.99 as does Lowell but when doing the single minor planet download in ST, it seems to be 16.60, I thought I would experiment. Horizons does not have "Close Approach Data" for 2010 CA261 and has a "Condition Code" = 9 (highly uncertain orbit). So I played around. Looks as if from my location, the rock is close (0.026AU or 10LD) and well placed (180az, 49° up @2:27CDT) in the early morning hours (5-9 UT) on Sept. 1. It's 98% illuminated and the Moon is under 10° up in the ENE. Similar conditions the last few days of August but slightly more Moon interference. Run it for your location.