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Gum 85 & 84 and Sharpless 54, 


            Theodore Arampatz...
Gum 85 & 84 and Sharpless 54
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Gum 85 & 84 and Sharpless 54

Technical card

Dates:June 24, 2017

Frames:Ha 5nm: 35x600" -10C bin 1x1

Integration: 5.8 hours

Darks: ~6

Flats: ~25

Flat darks: ~25

Bias: ~150

Avg. Moon age: 0.45 days

Avg. Moon phase: 0.23%

Bortle Dark-Sky Scale: 9.00

Basic astrometry details job: 3268688

RA center: 18h 17' 52"

DEC center: -11° 49' 8"

Pixel scale: 1.820 arcsec/pixel

Orientation: 358.196 degrees

Field radius: 0.649 degrees

Resolution: 2158x1393

Data source: Backyard


The bright "egg" in this image is nebula Gum 85 in Serpens; surrounding it is Gum 84 and surrounding that is Sharpless 54.Sharpless 54 is a larger object as described in the catalog as a 140 arc minutes which extends well beyond this field.This area of sky is located just north of M16, the Eagle Nebula.

Instruments and exposure data:

W.O FLT110 with dedicated TMB field flattener
FeatherTouch 3'' focuser
Starizona MicroTouch autofocuser
Meade DSI
Filters: 5nm Hα Astrodon
Sky-Watcher EQ6 Pro

Lum:35*10min bin1x1
Total exposure time:5h 50min



Theodore Arampatz...

Sky plot

Sky plot


Gum 85 & 84 and Sharpless 54, 


            Theodore Arampatz...