An apparently asteroidal 17th magnitude object discovered on CCD images taken with the LONEOS 0.59m Schmidt telescope on April 1.20 and posted on the NEOCP was found by other astrometric observers to be cometary on their CCD images.
Gleason with the Spacewatch telescope on 2000 Oct 7 and placed on the NEOCP but removed on Oct 20 for lack of follow-up.
Following placement in the NEOCP, further observations were reported.
Another category of object appearing on the NEOCP is objects that don't do what they are supposed to do.
This was the first confirmed case of such an asteroidal collision, but a second was reported via the NEOCP in December of the same year.
Although unusual objects like these do get put on the NEOCP, the main bulk of objects are Near Earth Asteroids, and amateurs can make useful contributions by helping to follow up newly discovered objects, allowing their orbits to be improved.
Following posting on the NEOCP, numerous CCD observers reported cometary appearance: Feb 5.3 UT, coma diameter about 12", brighter 60" tail in p.a.
Yet another apparently asteroidal LINEAR object, of 19th magnitude, discovered on Feb 2.44, and posted on the NEOCP was noted to have a 15"-16" tail toward the north-northwest on Feb 12 by J.
An apparently asteroidal object of 18th magnitude, discovered by LINEAR on Feb 25.20 and posted on the NEOCP was observed to be cometary by F.
An apparently asteroidal 17th mag object discovered by LINEAR on April 22.31, and noted on the NEOCP, was reported as cometary by Klet and Ondrejov observers [IAUC 7151, 1999 April 23].
An apparently asteroidal 19th mag object discovered by LINEAR on May 12.28, and noted on the NEOCP, was reported as cometary by Klet observers [IAUC 7166, 1999 May 13].
Another asteroidal object reported by LINEAR on May 15.32 UT (mag 18.2-18.8) with unusual motion was noted on the NEOCP, and it was subsequently reported to be cometary in appearance by several observers, including M.