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Contains:  IC 1274, IC 1275, IC 4684, IC 4685, NGC 6559
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IC4685, 



    
        

            Gary Imm
IC4685
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IC4685

Technical card


Dates:Aug. 17, 2017

Frames:
Blue: 30x30" (gain: 139.00) -10C bin 1x1
Green: 30x30" (gain: 139.00) -10C bin 1x1
Astrodon Ha 5mm: 12x300" (gain: 139.00) -10C bin 1x1
Luminance: 60x30" (gain: 139.00) -10C bin 1x1
Red: 30x30" (gain: 139.00) -10C bin 1x1

Integration: 2.2 hours

Avg. Moon age: 24.81 days

Avg. Moon phase: 23.20%


Basic astrometry details

Astrometry.net job: 1700192

RA center: 18h 9' 35"

DEC center: -23° 57' 36"

Pixel scale: 0.850 arcsec/pixel

Orientation: 271.108 degrees

Field radius: 0.607 degrees


Resolution: 4480x2520

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard

Description

I love astrophotography for many reasons. One of them is the sense of challenge, frustration, surprise, and wonder when imaging objects that I don't know well. I had very low expectations for this object based on the few other images I had seen. And up until an hour ago, I had regretted spending time on it. But somehow, in the end, the RGB, Lum, and Ha subs all came together into something special, at least for my eyes.

This object is a beautiful emission/reflection/dark nebula complex located in the constellation of Sagittarius, about 4,000 light years away. It is located in the southern sky close to the Lagoon Nebula (M8) and may be an eastern extension of it. The more I study the image, the more I see - the dense colorful star background shining through this dusty region of space, the bright bulbous reddish circular Ha areas, the black areas adjacent to the Ha regions, the interesting bluish reflection nebulae, the dark dust river running through the center of the image, the bright ionization front towards the left, and the smaller intricate bright area even further left.

I really enjoyed this object. Perhaps someday it will earn its own name.

Comments

Author

GaryI
Gary Imm
License: None (All rights reserved)
660
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IC4685, 



    
        

            Gary Imm

In these public groups

Cloudy Nights
The refractors!