Messier 106 and Friends
Place cursor over image to identify numerous faint galaxies

All Images Copyright Steve Cannistra

Please click here for a smaller image (35%).

Position Angle: 90 degrees
RA: 12h 18m 58s (J2000)
Dec: +47degrees 18' 41" (J2000)

M106 is the main attraction in this image, but there are so many other galaxies hidden within this deep 18 hour exposure that they are too numerous too count (please place your cursor over the image to identify some of these tiny galaxies).  M106 is the large central galaxy, with NGC 4248 in the lower right, at the 5 o'clock position.  This is an 18 hour total exposure imaged without guiding, at a focal length of 1317mm (Celestron 9.25 standard SCT with 0.63 focal reducer, but spaced to yield focal reduction of 0.56x instead of 0.63x), and with only 20 second subs taken through a low read noise CMOS camera (ASI1600).  More information about M106 may be found on Rob Gendler's website.

Photographic Details:
Dates of image acquistion:  March 19, 20, 21, 22, 2021
Scope:  Celestron 9.25" standard SCT (native f10) with 0.63 focal reducer (spaced to achieve f5.6 out of convenience due to my available spacers = 1317mm effective focal length), on the Takahashi NJP Mount
Autoguider:  None
Camera:  ZWO ASI1600, -20C, 3.8 micron pixel size, image scale 0.59"/pixel given above set up
Filters:  Baader LUM filter; RGB
Exposures:  Total exposure 18 hours (LUM: 12 hours; RGB: 6 hours)
Post-processing:  Calibrated, aligned and stacked in Maxim, followed by DDP in ImagesPlus (IP), mild decon in CCDStack, and processing in Photoshop CS (16 bit format)

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