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M5 – Globular Cluster in Serpens - SN10, D5300a

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#1 jgraham

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Posted 23 May 2020 - 03:02 PM

Telescope: Meade SN10 @ f/4, Orion Atlas EQ-G
Camera: Full Spectrum Modified Nikon D5300
Filter: Orion Imaging Skyglow Filter
Guide scope: Williams Optics 50mm, Meade DSI Pro II, PHD
Exposure: 61x45sec, ISO 200, saved as RAW
Darks: Internal (Long Exposure Noise Reduction On)
Flats: 32x1/50sec, Tee shirt flats taken at dawn
Average Light Pollution: Red zone, Bortle 8, poor transparency
Lensed Sky Quality Meter: 18.2 mag/arc-sec^2
Stacking: Mean with a 2-sigma clip.
White Balance: Nebulosity Automatic
Software: Backyard Nikon, Deep Sky Stacker, Nebulosity, Photoshop

 

M5 (4-18-2020)-1j.jpg

 

Like many globular clusters M5 is a relic of the early universe with an estimated age of 13 billion years. It is also one of the largest known globular clusters home to as many as 500,000 stars in a region 165 light years across. Its large size has been a major factor in its longevity. Globulars near the galactic plane slowly disperse as they lose stars to the Milky Way. However, M5 is so large that it has been able to hold on to most of its stars. At magnitude 5.7 M5 is an excellent target for small telescopes. In late May M5 is well placed in the southeast as twilight darkens and is visible for most of the night.

 


  • F.Meiresonne, Starman27, chrysalis and 5 others like this

#2 F.Meiresonne

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Posted 23 May 2020 - 03:05 PM

Great image, a ball of diamants.

 

Well done.



#3 Astroman007

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Posted 23 May 2020 - 03:07 PM

Beautiful image. M5 is one of my very favorite summer globulars, right behind the Hercules duo. Small scopes, such as mine, show it very nicely.



#4 Juno18

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Posted 23 May 2020 - 05:46 PM

Very nice M5 John!

 

Dang, your skies are worse than mine! Usually my sky measures 18.5-19.0.

 

I appreciate you posting all of your stats.

 

Very tough conditions and you produced a really  nice image. Excellent work!


Edited by Juno18, 23 May 2020 - 05:46 PM.



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