Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Hourglass nebula  ·  IC 4685  ·  Lagoon nebula  ·  M 20  ·  M 21  ·  M 8  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6531  ·  NGC 6544  ·  NGC 6546  ·  The star 4Sgr  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid nebula
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M8, the Lagoon Nebula and M20, the Trifid Nebula, Roger Clark
M8, the Lagoon Nebula and M20, the Trifid Nebula
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M8, the Lagoon Nebula and M20, the Trifid Nebula

Getting plate-solving status, please wait...
M8, the Lagoon Nebula and M20, the Trifid Nebula, Roger Clark
M8, the Lagoon Nebula and M20, the Trifid Nebula
Powered byPixInsight

M8, the Lagoon Nebula and M20, the Trifid Nebula

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Description

Here is a reprocess of data from 2015. Seeing was poor--I threw out 50% of the frames, sensor was hot: 29 C. 7D Mark II, 300 f/2.8 at f/2.8, iso 1600, 1-minute exposures. No darks, no flats, no bias, no guiding (tracking with and astrotrac).

Last years processing with 38 frames (38 minutes exposure):

http://www.clarkvision.com/galleries/gallery.astrophoto-1/web/m8+m20.rnclark.c08.12.2015.38frames.d-c1-1009s.html

New processing with the best 19 frames is below. Despite half the exposure, noise is lower, sharpness higher and fainter nebulae brought out.

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M8, the Lagoon Nebula and M20, the Trifid Nebula, Roger Clark