NGC 6309 also known as 'The Box Nebula', is a magnitude 11 planetary nebula located in the constellation Ophiuchus.

ABOUT THE IMAGE

DATE/TIME:  Taken on the evening of June 25th, 2014.

CAMERA:  Canon XSI, 450Da

TELESCOPE:  Celestron C9.25" SCT @ F/10

ISO SETTING:  800

EXPOSURES:  40

EXPOSURE LENGTH:  200sec.

TOTAL EXPOSURE LENGTH:  2hrs, 15min, 20sec.

SUBTRACTIONS: 16 dark frames, 40 flat frames and 16 dark-flat frames.

CAPTURE: MaximDL

STACKING/PRE-PROCESSING: Deep Sky Stacker

PROCESSING: Photoshop CS3