Hemisphere:  Southern  ·  Constellation: Centaurus (Cen)  ·  Contains:  NGC 5139  ·  Omega Centauri
Omega Centauri – Globular Cluster in Centaurus, 



    
        

            Terry Robison
Omega Centauri – Globular Cluster in Centaurus
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Omega Centauri – Globular Cluster in Centaurus

Omega Centauri – Globular Cluster in Centaurus, 



    
        

            Terry Robison
Omega Centauri – Globular Cluster in Centaurus
Powered byPixInsight

Omega Centauri – Globular Cluster in Centaurus

Technical card

Imaging telescopes or lenses: RC Optical Systems RCOS 10" Ritchey-Chrétien

Imaging cameras: SBIG STL-11000M

Mounts: AP900GTO Astro Physics

Guiding telescopes or lenses: RC Optical Systems RCOS 10" Ritchey-Chrétien

Guiding cameras: AOL + SBIG Remote Guide Head

Filters: Astrondon Astrodon

Accessory: FLI CW2-7 Filter wheel 7  ·  SBIG AO-L  ·  SBIG Remote Guide Head


Dates:May 1, 2020

Integration: 0

Avg. Moon age: 8.07 days

Avg. Moon phase: 57.25%


Basic astrometry details

Astrometry.net job: 3476205

RA center: 13h26m46s

DEC center: -47°2902

Pixel scale: 0.803 arcsec/pixel

Orientation: 353.391 degrees

Field radius: 0.528 degrees


Resolution: 3936x2624

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

This spectacular globular cluster is located in the constellation Centaurus. When viewed through an eyepiece, to say that his globular is impressive would be an understatement. The huge extent of pinpoint stars seen appear to go on forever and is beyond description. It is the largest globular cluster in the Milky Way, and a treat to view at the eyepiece or explore within an image. It should be worth noting that Omega Centauri is almost as large as a full moon.

A striking feature is the enormous amount of blue stars visible in the image. These “Blue Straggler Stars” are usually hot bright stars found in the cores of ancient star clusters. However, they appear to violate standard theories of stellar evolution. Typically stars created at the same time should lie on a clearly defined curve plotted in a Hertzsprung Russell diagram. Specifically, their positions on that curve are determined by their initial mass. But for some reason, Blue Stragglers are positioned well off this curve, suggesting that they may have undergone some abnormal stellar evolution. So far, this is not fully understood.

There are stars near the core that are estimated to average only 0.1 light-years away from each other. Gee, that would be a terrible place to try and get a good nights sleep.

Equipment Details:

•10 Inch RCOS fl 9.1

•Astro Physics AP-900 Mount

•SBIG STL 11000m

•FLI Filter Wheel

•Astrodon LRGB Filters

Exposure Details:

•Red 600X7 / 300X24 Binned 1X1

•Green 300X12 Binned 1X1

•Blue 600X6 / 300X24 Binned 1X1

•Lum 600X23 / 300X12 Binned 1X1

Total Time: 10 hours

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