Now I feel like an idiot, I had already produced a perfectly good sequence for this variable, and I forgot about it and produced a new one. The new sequence is satisfactory, but it is unnecessary. Please use the original old sequence at: http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/sumner/tvcol.seq However even the old sequence now needs some corrections. It contains several superfluous comparison stars that should be removed. The stars to remove are stars #5, #6 and #10. Otherwise this sequence is the one to use for this variable. I will be making the above corrections shortly, and replacing the file in the ftp directory show above. Bruce Sumner