Messier 33 with van Maanen Data

Messier 33 with van Maanen Data - Gendler

2003 Photograph courtesy of Robert Gendler

A Microsoft Excel file with van Maanen's data and scaling calculations is m33GendL.xls.

Dr. Gendler's image has been rotated 90 degrees counter-clockwise and van Maanen's
reference stars have been rotated one degree clockwise with respect to the center of M33.

The circle marked '367' represents the projected position of van Maanen's
"un-used" rapidly moving star which has moved enough to produce a visible
difference in its' position since 1922.

Reference

van Maanen, A., "Investigations on Proper Motion - Tenth Paper: Internal Motion
in the Spiral Nebula Messier 33, N.G.C. 598" - ApJ 57, 264-278 (1923) - NADS
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