Hi Leo > Thanks for the alert. > I noticed there is a gap in the TLE's for 18911 between 1962 day 109 > and 1967 day 202. Object lost in 1962 and number re-assigned in 1967? 18911 was only cataloged in 1988. I imagine the observations of this object were sitting unloved in the pile of uncorrelated targets as two sets of data, one correlated to the 1967-14 launch, and some analyst connected the two but didn't realize that the 1961-62 data ruled out the correlation with 1967-14. > 1967-14 E, 02683, has just 3 TLE's, all from 1981 day 232 to 236. (and none of the three TLEs have anything to do with 02683) > > Objects 26076 and 26078 were first assigned to 2000-06 F and H, > Cosmos 2369 Zenit-2 debris. They have tle's from 2000 day 37 > till 2000 day 92 respectively day 37 till day 39. > Then in 2005 they are re-assigned to 1999-40 E and F, Chandra > IUS debris. I'd missed this! Looks like they are associated with the IUS SRM-1 stage. I wonder what they are - maybe bits of solid motor slag or something. Just as long as nothing is falling off our spacecraft... > > Several objects have TLE's from before their actual launchtime. > Sometimes just shortly before, but sometimes days. I've seen these. They are almost certainly 'search elements' issued prelaunch to help radars know where to look. I suggest you will most often find these for US objects. I understand that they are not meant to enter the catalog but sometimes there's a goof. - Jonathan ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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