Editing Comet (section)

=== Lost ===
{{Main|Lost comet}}

A number of periodic comets discovered in earlier decades or previous centuries are now [[lost comet]]s. Their orbits were never known well enough to predict future appearances or the comets have disintegrated. However, occasionally a "new" comet is discovered, and calculation of its orbit shows it to be an old "lost" comet. An example is Comet [[11P/Tempel–Swift–LINEAR]], discovered in 1869 but unobservable after 1908 because of perturbations by Jupiter. It was not found again until accidentally rediscovered by [[LINEAR]] in 2001.<ref name="kronk">{{cite web |last=Kronk |first=Gary W. |title=11P/Tempel–Swift–LINEAR |url=http://cometography.com/pcomets/011p.html |work=Gary W. Kronk's Cometography |access-date=27 April 2009}}</ref> There are at least 18 comets that fit this category.<ref name="Meyer">{{cite web |url=http://www.comethunter.de/lost.html |title=Lost periodic comets |work=The Catalogue of Comet Discoveries |last=Meyer |first=M. |date=2013 |access-date=18 July 2015}}</ref>