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2021 RG19
#29
Hi BMD,

How do you decide which positions are the correct one to use to find these MPs? It seems that the epoch of the elements is key. If I'm checking the CNEOS website & clock on one of the MPs in the list, the elements are frequently for July 1 or July 5. Way off the mark for a close approach. Just downloaded the MPC's NEAs at Today's Epoch file & 2021 TZ is the last one on the list. I'll run the DBPS in ST4v next & see if anything turns up.

Check out 2015 TQ21. I had it reaching 22.6 mag & Re 0.04 AU on Oct 9 using elements for 2021 Oct 4, but today CNEOS shows it at close approach of 0.002 AU on Oct 7. Time to repeat the calculations & report back.

Good hunting,

Phil S.

I see that I've been misinterpreting the CNEOS table. I should use the 'Nominal' distance for the approach instead of the 'Minimum' distance. The 'Minimum' distance seems to be the distance that's calculated using the element values within the uncertainties that yields the closest approach distance. The elements for 2015 TQ21 weren't even updated from the 2021 Oct 4 values today, so no change in the estimated trajectory. It's still predicted to be 22.6 mag.

Clicking it in the CNEOS table yields the elements for 2015, too.

The DBPS for MPs <0.05 AU on Oct 7 found 29 objects, a new record! Most were on the list for Oct 3 & 5 of course.

Phil S.
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Messages In This Thread
2021 RG19 - by PMSchu - 2021-09-27, 04:20 PM
RE: 2021 RG19 - by razvan - 2021-09-27, 07:54 PM
RE: 2021 RG19 - by PMSchu - 2021-09-27, 10:30 PM
RE: 2021 RG19 - by razvan - 2021-09-28, 12:09 AM
RE: 2021 RG19 - by PMSchu - 2021-09-28, 12:53 AM
RE: 2021 RG19 - by razvan - 2021-09-28, 03:54 AM
RE: 2021 RG19 - by PMSchu - 2021-09-28, 03:33 PM
RE: 2021 RG19 - by razvan - 2021-09-28, 09:32 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-09-28, 10:23 PM
RE: 2021 RG19 - by razvan - 2021-09-29, 04:16 AM
RE: 2021 RG19 - by bigmasterdrago - 2021-09-29, 11:51 AM
RE: 2021 RG19 - by PMSchu - 2021-09-29, 03:50 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-09-30, 03:05 AM
RE: 2021 RG19 - by PMSchu - 2021-09-30, 04:24 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-09-30, 05:01 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-09-30, 09:55 PM
RE: 2021 RG19 - by razvan - 2021-10-02, 11:19 PM
RE: 2021 RG19 - by PMSchu - 2021-10-03, 12:03 AM
RE: 2021 RG19 - by razvan - 2021-10-03, 02:04 AM
RE: 2021 RG19 - by bigmasterdrago - 2021-10-03, 02:38 PM
RE: 2021 RG19 - by PMSchu - 2021-10-03, 04:33 PM
RE: 2021 RG19 - by razvan - 2021-10-04, 12:18 AM
RE: 2021 RG19 - by bigmasterdrago - 2021-10-03, 09:44 PM
RE: 2021 RG19 - by PMSchu - 2021-10-04, 12:53 AM
RE: 2021 RG19 - by razvan - 2021-10-04, 02:37 AM
RE: 2021 RG19 - by bigmasterdrago - 2021-10-04, 04:40 PM
RE: 2021 RG19 - by PMSchu - 2021-10-04, 04:52 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-10-04, 11:18 PM
RE: 2021 RG19 - by PMSchu - 2021-10-05, 03:26 PM
RE: 2021 RG19 - by bigmasterdrago - 2021-10-06, 03:51 AM

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