Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  M 20  ·  M 21  ·  NGC 6514  ·  NGC 6531  ·  Trifid nebula
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M20 and 21, Tom Robbe
M20 and 21
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M20 and 21

Getting plate-solving status, please wait...
M20 and 21, Tom Robbe
M20 and 21
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M20 and 21

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Acquisition details

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Description

Like the last image I posted here, that of M27, this image is from data collected from successive nights. And like that image, I'm not sure I prefer the result from the additional data. One can see a clear difference, but aesthetically I'm not sure which one I like better. How does one tell when they have collected the right amount of data? I guess I'll have to do a little research to answer that one..., Cheers, Happy Seeing and Good Transparency !

Comments

Revisions

  • M20 and 21, Tom Robbe
    Original
  • M20 and 21, Tom Robbe
    B
  • M20 and 21, Tom Robbe
    C
  • Final
    M20 and 21, Tom Robbe
    D

B

Description: This is the image from combined data, 109 frames from both nights.

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C

Description: I reprocessed this image attempting to leave in more of the detail in the darker regions, and I reduced saturation a bit.

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D

Description: Here's another attempt to make this image better.

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Sky plot

Sky plot

Histogram

M20 and 21, Tom Robbe