Re: Question about numbering

From: Brad Young via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 23 Nov 2019 18:23:12 +0000 (UTC)
Re-posting what I actually used as I think even on this list there are some folks that may be confused. Included Charles' comments (thanks) and some more corrections->
I think a quick note about satellite numbering would be useful:
NORAD (US numbering) =
1-44792 as of today, normal catalog of all objects as published by space-track. This numbering is temporally sequential; each object is numbered as it is found with next available number.
The International numbering for each is based on launch and will be
58-002B to 19-077C
e.g. 58-002B is B object from 2nd launch of 1958
Note this may lead to a situation where the 2 systems do not parse in sequence, e.g. 44792 is 98067QX, as it is a piece of debris from ISS that has just now been cataloged 21 years after launch.
81000-89496 as of today is a “analyst” catalog maintained by space track (see site for explanation)
They do not assign INTL numbers to these
The few times I have seen these, I use the number and “T” at the end for the INTL designation, I can’t remember who suggested that
You may notice a “Y2K - like” issue coming up with the numbering scheme with all the planned launches, but that is for another post…
ISON catalog:
10200-134640 as of today
The ones I see, I list as ISON with number if it overlaps NORAD
On my personal list, I add a 0 on the end if it is 5 digits to make it unique
I have assigned INTL ID of 50-XXXA to the ones I track, hoping the system will be fixed by 2050
Mike McCants’ classfd.tle:
Uses NORAD and INTL if it has been identified by analysts and observers
If unknown, uses 90xxx or 96xxx and the year + (DOY+500) + A,B,etc. for INTL
e.g.Unknown 07091490177 07757A meaning listed in 2007 on 257th day of year, “A” object
Notice that for this one, the listing date is included in name (Sep 14 2007)
90xxx and 96xxx originated as separate lists of unknowns, I believe 90xxx was hobbyist discovered and 96xxx was based on the COGO (CLASSIFICATION OF GEOSYNCHRONOUS OBJECTS) catalog published by ESA.
Test on Friday…

Brad Young Visual: Oberwerk 8 x 40 Mariner binocularsMeade ETX-125 22" f/4.2 UC ObsessionCOSPAR 8336 =TULSA1 +36.139208,-95.983429 660ft, 201mCOSPAR 8335 =TULSA2 +35.8311  -96.1411 1083ft, 330mRemote Imaging:MPC I89 COSPAR 7777 38.165653 -2.326735 5150ft, 1650m Nerpio, SpainMPC Q62 COSPAR 7778 -31.2733 149.0644 3400ft, 1122m Siding Spring, NSW, Australia MPC H06 COSPAR 7779 32.92 -105.528 7298ft, 2225m Mayhill, New Mexico USA MPC 323 COSPAR 7782 -32.008 116.135 984ft, 300m Perth, WA, Australia
 

    On Saturday, November 23, 2019, 10:18:54 AM CST, Charles Phillips via Seesat-l <seesat-l_at_satobs.org> wrote:  
 
 Brad wrote:


>    Date: Sat, 23 Nov 2019 01:39:44 +0000 (UTC)
>    From: Brad Young < allenb_young_at_yahoo.com mailto:allenb_young_at_yahoo.com >To: Seesat List < seesat-l_at_satobs.org mailto:seesat-l_at_satobs.org >
>    Subject: Question about numbering
>    Message-ID: < 2019249705.2812627.1574473184406_at_mail.yahoo.com mailto:2019249705.2812627.1574473184406_at_mail.yahoo.com >
>    Content-Type: text/plain; charset=UTF-8
>    I want to post to TruSat a description of the numbering scheme, comments appreciated:
>    I think? a quick note about numbering would be useful:
>    NORAD (US numbering) =
>    1-44792 as of today, normal catalog of all objects as published by space-track
>    The International numbering for each is based on launch and will be
>    58-002B to 19-077C
>    Note this may lead to a situation where the 2 systems do not parse in sequence, e.g. 44792 is 98067QX, as it is a piece of debris from ISS that has just now been cataloged 21 years after launch.
>    81000-89496 as of today is a "hobbyist" catalog maintained by space track (see site for explanation)
> 
Note that Space Track uses (mostly internally) the 8x,xxx numbers for "analyst" satellites. We can all grab copies of the analyst satellites from Space Track, they do catalog those objects from time to time. When I was an orbital analyst there I created analyst satellites mostly if I was not sure that they would be trackable objects - if they were reliably tracked for a day or so I would catalog them.


Charles Phillips
Spaceflight Research, LLC
Houston, Texas
713-882-4578
sites.google.com/site/spaceflightresearchprojects/
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Received on Sat Nov 23 2019 - 12:24:27 UTC

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