Does anyone know of a planetarium program, or any other means, which will allow me to plot the positions of comets discovered in a specific year? Regards Roger Dymock Email: roger.dymock at ntlworld.com Tel: 023 92647986 Skype: rogerdymock67 or Skype: rjvdymock Project Alcock http://www.britastro.org/projectalcock/