NGC 2997 is a face-on
unbarred spiral galaxy about 40 million
light-years away in the faint southern
constellation of
Antlia. It was discovered March 4, 1793 by German-born astronomer
William Herschel.
J. L. E. Dreyer described it as, "a remarkable object, very faint, very large, very gradually then very suddenly bright middle and 4 arcsec nucleus. This is the brightest galaxy of the [url=mw-redirect=https://en.wikipedia.org/wiki/NGC_2997_group]NGC 2997 group[/url] of galaxies.
From ATRIA observatory with DeepSkyChile in Chile:
ATRIA Team composed of 6 members : Olivier, Fabien , Frédéric . David , Julien , and myself ;-)
The CDK17" gives a lot of details, I kept only 339 subs from 576 taken in Luminance with FWHM below 2.3" .
It is the work to get nice and fine details !
And finally, I selected the 48 subs with FWHM better than 1.6" which give fine details of the galaxy.
Red 20 subs@420s -15°C gain high
Green 20 subs@300s -15°C gain high
Blue 20 subs@300s -15°C gain high
Light 339 subs@180s -15°C, gain high
Total integration : 22h 37′
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