M5 Globular Cluster (Mark Germani)

Celestial hemisphere: Northern · Constellation: Serpens (Ser) · Contains: 5 Ser · HD136202 · IC 4537 · M 5 · NGC 5904 · The star 5 Ser

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M5 Globular Cluster

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M5 Globular Cluster

After the cloudiest spring in recent memory, I had a few clear nights with a full-ish moon and a few hours each of actual darkness. So I figured it was time to tackle a globular cluster, and having (sort of) done M3 and M13 last year, I decided to have a go at M5, which was at its peak height at the time.

My usual 120s exposures with the L-Pro yielded disappointing results as far as detail was concerned when processing M51, so I figured I'd cut my exposure length down to 60s, which would help prevent core blow-out as well. I imaged over 2 nights with just shy of 2 hours each night. I figured I'd keep the sharpest 50% of the subs, but they were all reasonably sharp so I went with 90% in an effort to bring out the fainter stars.

I'm a little confused as to why 5 Serpentis is yellow instead of blue, but that might have to do with light pollution and/or overexposure. Anyone who wants to weight in on this strange discolouration is welcome to do so - I've noticed it in other shots for very bright stars. Either way, I think this is about as good as I can get with my FOV and a DSLR on a globular. I look forward to having another go at M13 later this summer.

Light Polluted skies
Optolong L-Pro filter
The refractors!
Broadband under Bortle 7/8/9
iOptron Skyguider Pro
Canadian Astrophotography
Pacific Northwest Astrophotographers
Musical Imagers
William Optics ZenithStar Z61/Z81
DSLR/Mirrorless Imagers from the World
DSLR and mirrorless astrophotography

* All *
Globular Clusters
Messier Objects
New General Catalogue Objects
William Optics Zenithstar 61

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Status	Advanced success
Started	...
Astrometry.net job	5806147
PixInsight job	BV1HEX5J12JH5NM64KU38VTDPTWHU81B
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	15h18m32s.82
RA (top/left)	15h17m25s.29
RA (top/right)	15h16m42s.64
RA (bottom/right)	15h19m39s.98
RA (bottom/left)	15h20m22s.71

Dec (center)	+02°04′51″.6
Dec (top/left)	+02°32′18″.7
Dec (top/right)	+01°47′59″.1
Dec (bottom/right)	+01°37′19″.0
Dec (bottom/left)	+02°21′38″.4

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M5 Globular Cluster

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