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Contains:  M 16, Eagle nebula, NGC 6611
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M16 in Oiii with Hyperstar and ASI183MC OSC camera, using only B and G pixels, 





    
        

            Freestar8n
M16 in Oiii with Hyperstar and ASI183MC OSC camera, using only B and G pixels

M16 in Oiii with Hyperstar and ASI183MC OSC camera, using only B and G pixels

Technical card

Resolution: 5496x3672

Dates:June 30, 2018

Frames: 30x120"

Integration: 1.0 hours

Avg. Moon age: 16.82 days

Avg. Moon phase: 95.31%

Astrometry.net job: 2122925

RA center: 274.733 degrees

DEC center: -13.859 degrees

Pixel scale: 0.892 arcsec/pixel

Orientation: 358.840 degrees

Field radius: 0.819 degrees

Locations: Patio, Melbourne, Victoria, Australia

Data source: Backyard

Description

This is largely an experiment to see how well a narrowband Oiii image could be captured using the B and G pixels of an OSC camera. The B and G pixels receive about equal signal from the Oiii line, which means 3/4 of the pixels are capturing good signal and the loss from using OSC vs. mono are not as great as expected.

In addition, the individual color channels were drizzled to create separate R, G, B channels all co-aligned, and each at full res. because of drizzling and dithering.

The total exposure here is 30x2m or one hour - with a full moon very nearby.

No processing other than levels in photoshop. No cropping or gradient removal. The lack of gradient given the light pollution and moon presence reveals all the benefits of narrowand despite using an OSC camera and fairly wide bandpass Baader high speed filters with hyperstar.

Comments

Author

Freestar8n
Freestar8n
License: None (All rights reserved)
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M16 in Oiii with Hyperstar and ASI183MC OSC camera, using only B and G pixels, 





    
        

            Freestar8n