Tip from Tom Boles. Useful for identifying any strange 'blobs' in your images; http://ned.ipac.caltech.edu/ Regards Roger Dymock Email: roger.dymock at ntlworld.com Tel: 023 92647986 Skype: rogerdymock67 or Skype: rjvdymock MPC Observatory Code: 940 Project Alcock http://www.britastro.org/projectalcock/