Technical Information:
Ha:OIII:SII:L:R:G:B: 570:480:480:570:180:180:240 (a total of 45 hours of light-frame exposure time used in this photo); luminance, red and green exposures were all 15-minute exposures;
blue all 20-minute exposures; Ha, SII and OIII were all 30-minute exposures. The luminance layer consists of the combined L images, with Ha and SII data woven in; the red channel has had both Ha and SII woven
into it; the green and blue channels had OIII data woven into them.
Equipment: RC Optical Systems 14.5 inch Ritchey-Chretien carbon fiber truss telescope, with ion-milled optics and RCOS field flattener, at about f/9, and an SBIG STX-16803 camera with
internal filter wheel (SBIG filter set), guided by an SBIG AO-X, all riding on a Bisque Paramount ME German Equatorial Mount.
Image Acquisition/Camera Control: Maxim DL, controlled with ACP Expert/Scheduler, working in concert with TheSky X.
Processing: All images calibrated (darks, bias and sky flats), aligned and combined in Pixinsight. Color combine in Pixinsight. Some finish work (background neutralization,
color calibration, NoiseXTerminator and BlurXTerminator) done in Pixinsight; some cleanup finish work was done in Photoshop CC.
Location: Data acquired remotely using my equipment located at Sierra Remote Observatories, Auberry, California.
Date: Images taken on many nights in May and June of 2021. Image posted August 4, 2021
Date: Image scale of full-resolution image: 0.56 arcseconds per pixel.
Seeing: Generally good, with individual calibrated luminance frames varying from 1.8 to 2.2 arcsecond FWHM.
CCD Chip temperature: -25C
