NGC6820 Emission Nebula in [SII], Ha and [OIII] Light

Click on image to enlarge click here for maximum resolution

Buy this and other photos here

Taken on July 14, 15, 15, 21 and 22, 2004 from my backyard in Castro Valley, California and on July 16 & 23 from Fremont Peak State Park, near San Juan Bautista, Ca.

AP180EDT f/9 imaging scope used at F=1215 (f/6.75)

AP 0.75x photo/visual telecompressor

AP80/900mm guide scope

AP1200GTO mount

SBIG ST10XME  imaging camera @-26C and -20C

FLI CFW1 Filter wheel

FLI DF2 Digital Focuser

ST7E guide camera @ -22C

Custom Scientific Narrowband Emission Line Filters

   [Sulfur II]                     672.4nm  3nm FWHM

   Hydrogen alpha        656.3nm  3nm FWHM

   [Oxygen III]                 500.7nm  3nm FWHM

12 exposures of 600 seconds for Ha

20 exposures of 600 seconds for [SII]

23 exposures of 600 seconds for [OIII]

Total exposure time = 9 hours 10 minutes

Hit Counter