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Contains:  M 27, Dumbbell nebula, NGC 6853
Getting plate-solving status, please wait...
The Dumbell Nebula Narrowband, 





    
        

            Don Curry
The Dumbell Nebula Narrowband

The Dumbell Nebula Narrowband

Technical card

Resolution: 2175x2053

Dates:Aug. 18, 2018

Frames:
Astrodon 5nm OIII: 75x1800" -20C bin 1x1
Astrodon Gen2 Ha 3nm: 92x1800" bin 1x1

Integration: 83.5 hours

Darks: ~36

Flats: ~20

Avg. Moon age: 7.54 days

Avg. Moon phase: 51.71%

Bortle Dark-Sky Scale: 3.00

Mean SQM: 20.00

Astrometry.net job: 2258185

RA center: 19h 59' 35"

DEC center: +22° 43' 22"

Pixel scale: 0.406 arcsec/pixel

Orientation: 79.582 degrees

Field radius: 0.169

Locations: Home Observatory, Kingman, Arizona, United States

Data source: Backyard

Description

The updated version finally is calibrated with 18 darks and 16 flats for Ha and OIII in Maxim DL5 and has included my best subs captured so far.

This may be a very interesting challenge for me to do this in narrowband but I like challenges and this will be a work in progress. My goal is trying to recreate what I saw visually through a 40 inch dobsonion telescope a few years ago at Table Mountain Star Party. The outer shell was almost more intense then the M27 itself and much more is there to be captured.
Updated revised version with 50 hours of data collected with some during the monsoon season.
I started this in beginning July with about a 7 hour window of imaging; but now has narrowed down to a 4 hour window and will stop collecting data end of September and possibly revisit next year at another attempt.
I did use PSF function in Pixinsight along with Star Mask and deconvolution to tighten up star structures throughout image and appears to be of benefit capturing at 2650mm.
Really becoming a challenge now to maintain FWHM to lower values as image window shrinks from optimization of altitude available as it transits much earlier each week in September 2018.
Next update probably won't be until the 80 hour mark of data collection.

Comments

Author

trombone76
Don Curry
License: Attribution-NonCommercial-NoDerivs Creative Commons
1650
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Revisions

  • The Dumbell Nebula Narrowband, 





    
        

            Don Curry
    Original
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            Don Curry
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  • Final
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            Don Curry
    G

Sky plot

Sky plot

Histogram

The Dumbell Nebula Narrowband, 





    
        

            Don Curry