When, for obvious reasons, observers and analysts prefer either UN International ID or USSPACECOM Catalog numbers to identify their reports, and also use numbers like 98004, 99008 or numbers starting with 00, which (may soon) appear in real elsets, it is becoming confusing, and difficult to spot the unknowns, and to correlate observations and elsets. I would propose using 4xxxx in elsets, and 4xxxx or 444xxxx in observation reports, which would stand out clearly, and not be confused with real objects for quite some time, or with historical objects. NOSS 1 98004U 99059.82471721 .00000200 00000-0 24274-3 0 02 2 98004 63.3534 29.3918 0324004 26.0843 333.9156 13.46073785 09 0098004 194812.26 093032+524038 7.0 7.0 0 S 0098004 194912.29 101315+352449 6.8 6.8 0 S 9900801 041532.50 062153+583410 6.5 6.5 0 S 9900801 041547.77 065257+582620 6.3 6.3 0 S 99008 99 042MOL 8597 G 19990319105306400 27 25 0740500-722300 48 S+060 05 99008 99 042MOL 8597 G 19990319105551300 27 25 0904100-470600 48 S+060 05 trump1 1 99008L 99042MOL 99 62.50802951 +.00000153 +00000+0 +00000+0 6 00070 2 99008 63.0638 149.8968 6907794 271.6284 8.8938 2.00609473000410 -- bjorn@tt-tech.se (office) b_gimle@algonet.se (home) -- -- http://www.algonet.se/~b_gimle -- -- COSPAR 5918, 59.298 N, 18.104 E, 55 m -- -- SeeSat-L / Visual Satellite Observer Home Page found at -- -- http://www.satellite.eu.org/satintro.html --