Date: September 9, 2015
Telescope: CDK20N
Filters: griz
Observer: John Kielkopf
Processing: dark, flat, wcs, png with sqrt display zoom 4

Indentified using Sky & Telescope Neptune javascript application
 

neptune_00018_i_dfw.fits
TARGET  =  Neptune
EXPTIME  =  100.0
FILTER  =   i_(700-825)
DATE-OBS  =  2015-09-17T02:35:17.896
INSTRUME  =