Observable Comets
NASA and non NASA astronomers work collectively to maintain a list managed by the Minor Planet Center (MPC), which includes observable comets, comet ephemerides, orbit data and observation dates. The MPC is based at the Smithsonian Astrophysical Observatory and operates with support from the International Astronomical Union. This resource can be accessed at http://www.minorplanetcenter.net/iau/Ephemerides/Comets/. Website: [...]