OBJECT |
NGC
6888 (Crescent Nebula) and surroundings (image is reduced-size | other sizes:
medium
, original)
Distance:
5,000 light years |
Telescope |
Takahashi FS-60C @ f/6.2 |
Mount |
Takahashi EM200 Temma II |
Camera |
QSI 540wsg @ -15C |
Filters |
Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen
2 |
Guider |
SX Lodestar |
Settings |
6x20min Ha, 2x5min L (bin1x1); 2x5min
ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias) |
Date/Location
Notes |
23 November 2016 - Las Cruces, NM
Published in Amateur
Astronomy Magazine quarterly, Spring 2017 issue, pg 71 (screenshot).
This image is LHaRGB, where Ha was used in combination with
Luminance and Ha:R (60:40) was used for the Red channel.
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Copyright Jeffrey O. Johnson
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