Messier 106 and Friends
Place cursor over image to identify numerous faint
galaxies
Characteristics:
Position Angle: 90 degrees
RA: 12h 18m 58s (J2000)
Dec: +47degrees 18' 41" (J2000)
Description:
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)
Please
note: Graphics on this website
may not be reproduced without author permission.
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