M9 (RGB) - 15 May 2020 (Geof Lewis)

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: M 9 · NGC 6333

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M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

Powered byPixInsight

M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

I continue to work through the low down southerly Messier targets with the data for M9 being capture over 2 nights, mostly in astro, or even nautical twilight so there were lots of bright sky gradients to process away. Most of the captures on 12 May were in a very bright sky so the green data captured between 03:20am and 03:50am was awful, hence I shot some more a bit earlier on the 15th.

Imaging low down in a bright sky certainly compromised guiding performance, hence the egg shaped stars, however, M9 never reaches even 20 deg altitude from my location and is only visible from my observatory for a few weeks in the year, when there is limited astronomical darkness, so it's a case of use whatever opportunity I can muster.

Original
Final
B

B

Title: Reprocessed using PixInsight.

Description: Another attempto to salvage something from some pretty awful data full of sky gradients and other artefacts. I will probably need to shoot this again, but it's always going to be a very challenging target from my location.

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Status	Advanced success
Started	...
Astrometry.net job	9420538
PixInsight job	E75CUWIKKARE0EKIEE9CFXL7QAH0OLIX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	17h19m11s.459
RA (top/left)	17h19m41s.780
RA (top/right)	17h19m42s.672
RA (bottom/right)	17h18m41s.726
RA (bottom/left)	17h18m40s.220

Dec (center)	-18°31′01″.100
Dec (top/left)	-18°41′08″.24
Dec (top/right)	-18°21′11″.81
Dec (bottom/right)	-18°20′53″.53
Dec (bottom/left)	-18°40′51″.15

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M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

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M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

M9 (RGB) - 15 May 2020

Revision title: Reprocessed using PixInsight.

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