Dave Mitsky's Doubles for April

I've uploaded a new sheet with the doubles listed for April 2008/2009, with J2000.0 co-ordinates and SAO numbers added by Herbert Kraus.

I've changed the format to include some extra fields that allow filtering and sorting. I maintain this list using Numbers on a Mac. Unfortunately the formulae to convert the RA/Dec coordinates to numerical values (to allow sorting/filtering) could not be exported, so I've just exported the values. The original Numbers sheet is available.

Worth noting is that the co-ordinates are epoch J2000.0, and many of these stars have high proper motion. Good sky chart software should correct for proper motion, parallax and even precession.

I intend eventually to put these lists in a database, allowing me to use the SAO catalogue to add more data such as proper motion.

I double check the coordinates, but there may be errors. Corrections, criticism and comments are gratefully received.

M42 20071230

M42 20071230

Originally uploaded by Stuart Croy

Old image of M42 from 2007 that needs reprocessing