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Contains:  NGC 6530, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, The star 9Sgr, The star 7Sgr
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M8 with ASI183MC OSC camera and Ha filter - Hyperstar.  Looks like mono., 





    
        

            Freestar8n
M8 with ASI183MC OSC camera and Ha filter - Hyperstar.  Looks like mono.

M8 with ASI183MC OSC camera and Ha filter - Hyperstar. Looks like mono.

Technical card

Resolution: 5496x3672

Dates:July 1, 2018

Frames: 7x240"

Integration: 0.5 hours

Avg. Moon age: 17.71 days

Avg. Moon phase: 90.50%

Astrometry.net job: 2128007

RA center: 271.039 degrees

DEC center: -24.375 degrees

Pixel scale: 0.896 arcsec/pixel

Orientation: 358.953 degrees

Field radius: 0.823 degrees

Locations: Patio, Melbourne, Victoria, Australia

Data source: Backyard

Description

This is another test of using OSC with Hyperstar and Ha filter.

In this case only 1/4 of the pixels are active - but with dithering and drizzling there is no loss of resolution. This is only 7x4m exposures and it shows good resolution and depth - despite using an OSC camera and only 1/4 of its pixels.

No processing other than levels in photoshop. No cropping, no sharpening. No gradient removal. Full moon nearby, and suburban location with darkest sky being about 18.5 mag/arc-sec^2.

Another thing different here is that I used a 1.25" Custom Scientific 10nm Ha filter - instead of the Baader fast f/2 filters I normally use with hyperstar. This is partly to see if 10nm has any impact in this mode - but clearly it works pretty well.

Comments

Author

Freestar8n
Freestar8n
License: None (All rights reserved)
9021
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Revisions

  • M8 with ASI183MC OSC camera and Ha filter - Hyperstar.  Looks like mono., 





    
        

            Freestar8n
    Original
  • Final
    M8 with ASI183MC OSC camera and Ha filter - Hyperstar.  Looks like mono., 





    
        

            Freestar8n
    B

Sky plot

Sky plot

Histogram

M8 with ASI183MC OSC camera and Ha filter - Hyperstar.  Looks like mono., 





    
        

            Freestar8n