Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 2247, NGC 2245, IC 2169, IC 446
Getting plate-solving status, please wait...
IC 2169 and Other Blue Reflections!, 


            Kurt Zeppetello
IC 2169 and Other Blue Reflections!

IC 2169 and Other Blue Reflections!

Technical card

Resolution: 3837x2842

Dates:March 4, 2019March 6, 2019March 9, 2019

ZWO B 1.25" optimized for ASI1600: 50x90" (gain: 139.00) -20C bin 1x1
ZWO G 1.25" optimized for ASI1600: 52x90" (gain: 139.00) -20C bin 1x1
ZWO L 1.25" optimized for ASI1600: 64x90" (gain: 139.00) -20C bin 1x1
ZWO R 1.25" optimized for ASI1600: 47x90" (gain: 139.00) -20C bin 1x1

Integration: 5.3 hours

Darks: ~10

Flats: ~15

Bias: ~20

Avg. Moon age: 19.86 days

Avg. Moon phase: 3.86%

Bortle Dark-Sky Scale: 5.00 job: 2577568

RA center: 6h 31' 35"

DEC center: +10° 11' 13"

Pixel scale: 1.206 arcsec/pixel

Orientation: 284.214 degrees

Field radius: 0.800

Locations: Happy Frog Observatory, Monroe, Connecticut, United States

Data source: Backyard


There are several reflection nebulae as well as dark nebulae in this image from a portion of constellation Monceros. The largest being IC 2169 located in the bottom left. The nebula is blue due scattered light from a nearby star coming in contact with dense grains of interstellar dust, scattered tends to be blue rather than red as in emission nebulae. There is a interesting dark dust lane which begins in the nebula seems to stretch to IC 2167 which is on the middle right. Stellarium has this listed as interstellar matter which it is composed of. On the top are NGC 2245, closer to the center, and NGC 2247 closer to the top edge. Both of these are blue reflection nebula with a bright core than IC 2169 and both seem to have dark dust clouds near by. This whole area has many colorful blue and orange stars of all sizes.

I really like imaging these types reflection nebula but I find processing them to be quite difficult. I had to do a lot of processing in order to make it look presentable and unfortunately every object has its own processing method. I have a loose flow-process that I do but it varies quite a lot from one object to another object. Of course I would have preferred to get more data but my limited viewing window along with poor weather conditions in southern Connecticut prevent that. I would have had another 45 minutes but I must have had dirt on my glasses when I was focusing - oh well - I am happy with what I got. My ASI1600 is back in working order and I am imaging with it again.



Kurt Zeppetello
License: None (All rights reserved)

Sky plot

Sky plot


IC 2169 and Other Blue Reflections!, 


            Kurt Zeppetello