M1 - Crab Nebula (Andres Salaverria)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Crab nebula · LBN 833 · M 1 · NGC 1952 · Sh2-244

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M1 - Crab Nebula

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M1 - Crab Nebula

Why not? This is a 33m integration image of M1. Seeing was Poor (2 out of 5 on the Clear Sky Chart) and Transparency was average (or above - can't remember). I set to work on my guiding with the C8 at f/7 and the RST-135. I have been struggling to get under 1" guiding. It was an interesting experiment. I managed to guide under .85" but as the night progressed it got to 1.5" and above. At some point I lost my PA. Not sure why, and had to restart. I did some imaging, and got about 45 mins worth of subs of M1 at 60s gain 0. Clearly some of them, showed awful star shapes. Using APP I removed the ones that looked the worst and ended with 33 mins. Not bad (for my taste) considering: Bortle 9, average RMS over 1s, short integration time, and uncalibrated integration. You can see the slightly "oblong" stars, but heck, like I said, "why not?".

I thought I would share my experience, hoping that I am not the only aspiring astrophotographer struggling to image from inner city and dealing with bad seeing on a consistent basis.

Processing details: Integration using APP, PS for cropping (also had some issues reframing), and minor level curves touch-up, very small denoising with Topaz.

Enjoy!

Broadband under Bortle 7/8/9
Schmidt-Cassegrain Telescope (SCT) Imagers
Suburban Astrophotography

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	5450350
PixInsight job	OT6EQM7I1JHFP4JQXECP1Q68WJMCB7BA
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h34m28s.799
RA (top/left)	05h34m02s.293
RA (top/right)	05h33m41s.304
RA (bottom/right)	05h34m55s.263
RA (bottom/left)	05h35m16s.400

Dec (center)	+21°59′15″.21
Dec (top/left)	+22°10′12″.22
Dec (top/right)	+21°53′13″.74
Dec (bottom/right)	+21°48′17″.92
Dec (bottom/left)	+22°05′15″.68

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M1 - Crab Nebula

M1 - Crab Nebula

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M1 - Crab Nebula

M1 - Crab Nebula

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