M5 (John Favalessa)

M5

It's been two years since I imaged a cluster...even with the new tools I forgot how much a bitch-kiddy they are to process! 🤪 I know it's a bit oversaturated, but I really like the star colors and wanted to show them off. I did use luminance at the end of processing and captured those subs without any filter. Data was from dark skies from my eclipse road trip, New Mexico, Colorado and Arizona. I might wait another two years for my next attempt at another cluster 😂 Version F shows the plate solve for the full frame image...looking away from the Milky Way shows tons-o-galaxies. -john

from Wikipedia: Messier 5 also known as NGC 5904 or the Rose Cluster) is a globular cluster in the constellation Serpens. It was discovered by German astronomer Gottfried Kirch in 1702 when he was observing a comet. Charles Messier noted it in 1764 and—a studier of comets—cast it as one of his nebulae. William Herschel was the first to resolve individual stars in the cluster in 1791, counting roughly 200.[9] Messier 5 is receding from the Solar System at a speed over 50 km/s. One hundred and five stars in M5 are known to be variable in brightness, 97 of them belonging to the RR Lyrae type. ] RR Lyrae stars, sometimes referred to as "Cluster Variables", are somewhat similar to Cepheid type variables and as such can be used as a tool to measure distances in outer space since the relation between their luminosities and periods are well known. The brightest and most easily observed variable in M5 varies from magnitude 10.6 to 12.1 in a period of just under 26.5 days. The cluster contains two millisecond pulsars, one of which is in a binary, allowing the proper motion of the cluster to be measured.

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Title: M5 tight crop

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Title: Plate solved full frame image

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Status	Advanced failed
Started	...
Astrometry.net job	9762818
PixInsight job	3FE91EW8MH7L3SX31Y7U96UBKX7T08I7
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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