Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
2023 DZ2
#40
Greg went to a lot of work to get SkyTools to use any element set (epoch) we want. Anytime. If you go to https://ssd.jpl.nasa.gov/horizons/app.html#/, make sure that the element type: is Osculating Orbital Elements, Choose your Target Body: 2023 DZ2, Coordinate Center: Sun, Time you want the element set for, and make sure #5 is set for your custom settings, Output Units: AU and Days. It will give you a set to edit into the MP edit box. Just do a simple copy and paste of the full output like I mentioned above and make sure to enter the name, H & G.

Save it, then go to that date and time for the position ephemeris and object that you edited. Run it for a period within a few hours of that epoch. If the rock is really close (<1LD) stay very close to the elements epoch time.

Here is a sample output for the small rock 2023 FY3 when it was less than 1.5LD away.    

Use the 1:00TDB time, not the one marked in blue (sample time only). You can paste it in, then run an ephem for that time and compare to the position output at Horizons.

My ephem in ST4v is only a few seconds off. Although it is a bit time consuming and condifluted to manage, it works very well for those stinking small close pass rocks.

Just to show how precise or accurate ST4 can be with a lot of massaging and additional input, I ran the ephemeris for 2023 FY3 just now for the date very near the close pass (March 24 20:00CDT) when just 1.456751LD (559977.8Km) away from my yard. Compare those from ST4v and those from Horizons:

   
Reply


Messages In This Thread
2023 DZ2 - by bigmasterdrago - 2023-03-17, 05:02 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-17, 07:05 PM
RE: 2023 DZ2 - by Dennis - 2023-03-18, 12:35 AM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-18, 03:24 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-18, 05:39 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-19, 03:41 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-19, 06:03 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-19, 10:51 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-20, 08:20 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-21, 02:39 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-21, 05:51 PM
RE: 2023 DZ2 - by Dennis - 2023-03-23, 03:13 AM
RE: 2023 DZ2 - by Bobbo - 2023-03-23, 09:43 AM
RE: 2023 DZ2 - by Dennis - 2023-03-23, 10:21 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-23, 05:42 PM
RE: 2023 DZ2 - by Dennis - 2023-03-23, 09:39 PM
RE: 2023 DZ2 - by Dennis - 2023-03-23, 10:48 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-24, 04:50 PM
RE: 2023 DZ2 - by Dennis - 2023-03-24, 09:15 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-24, 09:40 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-25, 05:52 PM
RE: 2023 DZ2 - by Bobbo - 2023-03-26, 11:05 AM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-26, 06:35 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-27, 04:49 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-27, 07:28 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-28, 02:30 AM
RE: 2023 DZ2 - by Dennis - 2023-03-28, 05:31 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-28, 06:30 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-28, 09:58 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-29, 03:40 AM
RE: 2023 DZ2 - by Dennis - 2023-03-29, 04:05 AM
RE: 2023 DZ2 - by Dennis - 2023-03-29, 08:29 AM
RE: 2023 DZ2 - by Dennis - 2023-03-29, 09:35 AM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-29, 01:06 PM
RE: 2023 DZ2 - by Dennis - 2023-03-29, 08:31 PM
RE: 2023 DZ2 - by PMSchu - 2023-03-29, 08:43 PM
RE: 2023 DZ2 - by Dennis - 2023-03-29, 11:12 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-30, 02:53 AM
RE: 2023 DZ2 - by PMSchu - 2023-03-30, 06:27 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-30, 07:18 PM
RE: 2023 DZ2 - by bigmasterdrago - 2023-03-30, 08:22 PM

Forum Jump:


Users browsing this thread: 1 Guest(s)