56P/Slaughter–Burnham 85D/Boethin Comet NEOWISE 55P/Tempel–Tuttle List of numbered comets 57P/du Toit–Neujmin–Delporte C/2012 E2 (SWAN) 276P/Vorobjov Robert Burnham Jr. NGC 2420 Pioneer Venus Orbiter Peaceful nuclear explosion 2014 in spaceflight
56P/Slaughter–Burnham 85D/Boethin Comet NEOWISE 55P/Tempel–Tuttle List of numbered comets 57P/du Toit–Neujmin–Delporte C/2012 E2 (SWAN) 276P/Vorobjov Robert Burnham Jr. NGC 2420 Pioneer Venus Orbiter Peaceful nuclear explosion 2014 in spaceflight