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 6357
Getting plate-solving status, please wait...
Into the core of NGC6357, 





    
        

            Andrew Klinger
Into the core of NGC6357

Into the core of NGC6357

Technical card

Resolution: 1800x1300

Dates:May 31, 2019

Frames:
Ha 5nm: 35x300" (gain: 200.00) -10C bin 1x1
Astrodon OIII 3nm: 33x300" (gain: 200.00) -10C bin 1x1
Astrodon SII 3nm: 34x300" (gain: 200.00) -10C bin 1x1

Integration: 8.5 hours

Darks: ~64

Flats: ~30

Bias: ~200

Avg. Moon age: 26.57 days

Avg. Moon phase: 9.60%

Bortle Dark-Sky Scale: 3.00

Astrometry.net job: 2990496

RA center: 261.312 degrees

DEC center: -34.231 degrees

Pixel scale: 1.013 arcsec/pixel

Orientation: 300.554 degrees

Field radius: 0.312 degrees

Locations: Atoka dark site, Atoka, Oklahoma, United States

Data source: Backyard

Description

Using my NGC6357 data from May 2019, I heavily cropped and re-processed the core region. This chaotic scene in space holds home to some of the most massive stars, who's stellar winds shape and excite the dust around them to form these intricate glowing nebula.

In this false-color narrowband image, I display the sulfur and hydrogen signal as the warm tones, and oxygen as blue.

Equipment:
OTA: William Optics GT81 w/0.8x reducer (382mm fl at f/4.7)
74mm aperture stop-down ring (brings scope to f/5.2)
Mount: Orion Sirius EQ-G (HEQ-5)
Guidescope: Orion 50mm guidescope
Guiding camera: Orion StarShoot Autoguider
Imaging camera: ZWO ASI1600MM-Cool

Accessories:
QHYCCD PoleMaster

Software:
SGP
PHD2
CdC
PixInsight
Starnet++

Acquisition:
Location: Atoka, OK (Bortle 3)
Dates: 5/31/19, 6/26/19, 6/27/19
Gain: 200 Offset: 50
Camera temp: -10C
Sii: 34x300" Astrodon 3nm
Ha: 35x300" Astrodon 5nm
Oiii: 33x300" Astrodon 3nm
Total integration time: 8hr 30min
64x darks per calibration (master from library)
30x flats per calibration
200x bias per calibration (master from library)

See my previous widefield posting of NGC6357 for processing workflow. The workflow was very similar except all channels were Drizzled 2x for better resolution of the core area.

Comments

Author

ak_astro
Andrew Klinger
License: None (All rights reserved)
1743
Like

Sky plot

Sky plot

Histogram

Into the core of NGC6357, 





    
        

            Andrew Klinger

In these public groups

Narrowband imaging