The most recent Fabry-Perot centroid, taken at 12-Jan-09 18:53:00, plotted as diamonds, is:

Data X	Y	Geometry X	Y
298.150	307.900	322.294	289.504

The median Fabry-Perot centroid for the interval is:

192.546

281.740

169.960

281.278

The standard observation before the 1999 upgrade was binned 2 x 2 pixels; the standard since is 1 x 1 binned.