Not all neutron stars are speed demons. 1E 161348–5055, the bright blue dot at the center of the supernova remnant RCW 103, takes 6.67 hours to rotate once. This is the slowest spin among the more than 2,600 known neutron stars in our galaxy. 
X-ray: NASA/CXC/University of Amsterdam/N. Rea et al.; Optical: DSS