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Contains:  B85, M 20, M 21, M20, M21, NGC 6514, NGC 6531, Sh2-28, Sh2-30, Trifid nebula
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M20 Trifid Nebula and M21 Webb's Cross, 



    
        

            Sven Hoffmann
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M20 Trifid Nebula and M21 Webb's Cross

Technical card

Imaging telescopes or lenses: SkyWatcher Esprit 100ED Super APO Triplet

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: SkyWatcher AZ-EQ5 GT

Guiding telescopes or lenses: SkyWatcher Esprit 100ED Super APO Triplet

Guiding cameras: QHYCCD QHY5L-IIm

Software: Pleaides Astrophoto PixInsight 1.8 Ripley  ·  Sequence Generator Pro  ·  Astro Pixel Processor

Filters: Baader L  ·  B  ·  G  ·  R

Accessory: ZWO OAG  ·  ZWO EFW 8x 1.25"  ·  Skywatcher Field Flattener for Esprit 100  ·  Lacerta Motorfokus


Dates:June 5, 2019June 9, 2019June 29, 2019July 1, 2019

Frames:
B: 106x60" (gain: 76.00) -15C bin 1x1
G: 107x60" (gain: 76.00) -15C bin 1x1
Baader L: 114x60" (gain: 76.00) -15C bin 1x1
R: 107x60" (gain: 76.00) -15C bin 1x1

Integration: 7.2 hours

Darks: ~32

Flats: ~16

Flat darks: ~16

Avg. Moon age: 15.73 days

Avg. Moon phase: 15.66%

Bortle Dark-Sky Scale: 5.00

Mean FWHM: 2.50

Temperature: 20.00


Astrometry.net job: 2788228

RA center: 18h 2' 58"

DEC center: -22° 47' 13"

Pixel scale: 1.412 arcsec/pixel

Orientation: -92.164 degrees

Field radius: 1.075 degrees


Resolution: 4383x3299

Data source: Backyard

Description

Hi guys,

this image was a really hard one for me I have to say. M20 rises only to about 12 degrees maximum where I live which made it really hard to collect all the data for a good image. Nevertheless I kept at it and collect a reasonable amount to edit this image. I tried for about 3 days until I am finally satisfied with it. There are some residual gradients due to the light pollution here and at the low altitude I have to shoot through a lot of it.

I hope you enjoy looking at it as much as I :) I took some special care to making sure you can actually perceive the myriad of stars in the background with all there different colors.

Comments

Author

roofkid
Sven Hoffmann
License: None (All rights reserved)
5441
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M20 Trifid Nebula and M21 Webb's Cross, 



    
        

            Sven Hoffmann