SEARCHING DT Lyr updated O-C (very poor observations last 10 years)

Collaboration Rob Garofalo

STAR	RA2000	DE2000	TYPE
DT Lyr	19 3 22.48	+29° 53 14.3	(14.0 - 14.9 Mv P=0.7879075)

Newton 300 mm F4, Sbig 8300 CCD , V filter

Integ. 70 sec.

photometric run July 20, 2010, calculated TOM was for 21:16 UT

observed Minimum 20:57 UT

O-C = - 0.0130 d (e= +/- 0.00078)

Red point si O-C position of July 20, 2010 observations, referred to O-C gateway from 1928 (courtesy BRNO Obs)

photometric run Sept. 10, 2010, calculated TOM was for 21:19 UT

observed Minimum 21:06 UT

O-C = -0.009 d

Red point si O-C position of Sept 10, 2010 observations, referred to O-C gateway from 1928 (courtesy BRNO Obs)