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Numerical simulations suggest that Neptune primordial co-orbitals mayoutnumber the equivalent population hosted by Jupiter, yet the objects remainelusive. Since the first discovery in 2001 just 10 minor planets have beenidentified as Neptune co-orbitals. On the other hand, some simulations predictthat a negligible fraction of passing bodies are captured into the 1:1commensurability with Neptune today. Hundreds of objects have been discoveredin the outer solar system during the various wide-field surveys carried outduring the past decade, and many of them have been classified using cuts in thepericentre and other orbital elements. This leads to possiblemisclassifications of resonant objects. Here, we explore this possibility touncover neglected Neptune co-orbitals. We confirm that 4 objects previouslyclassified as Centaurs by the MPC currently are temporary Neptune co-orbitals.(148975) 2001 XA255 is the most dynamically unstable of the four. It appears tobe a relatively recent (50 kyr) visitor from the scattered disk in its way tothe inner solar system. (310071) 2010 KR59 is following a complex horseshoeorbit, (316179) 2010 EN65 is in the process of switching from leading totrailing Trojan, and 2012 GX17 is a promising trailing Trojan candidate inurgent need of follow-up. The four objects move in highly inclined orbits andhave significant eccentricities. These dynamically hot objects are notprimordial 1:1 librators, but are captured and likely originated from beyondNeptune.

Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17