NGC 2419 Intergalactic Wanderer (Vitali)

NGC 2419 Intergalactic Wanderer

NGC2419 is an outstanding globular cluster which orbits the Milky Way every 3 billions years. Its path takes it far beyond the galaxy into the intergalactic space. Its distance from the galaxy center is currently about 300 000 light years, which is farther away than the Magellanic Clouds. Due to the large distance the NGC2419 brightness is only about 10m and its apparent size is about 6 arcmin. However in fact it is a huge cluster nearly 500 light years across, which is almost 3 times larger than the Omega Centauri. Recent studies showed that the NGC2419 star population is unusual for a globular cluster.

This image is a result of an experiment on short exposures, which should have minimized the effect of seeing variability. There are 1434 unguided frames 60 seconds each. The data have been processed using the Pixinsight Weghted Batch Preprocessing script and CFA drizzle integration.

The resulting image has been downsampled from 0.35"/px to 0.7"/px.

The field includes a number of tiny background galaxies and stars up to the 21st magnitude.

Links:

https://cseligman.com/text/atlas/ngc24.htm#2419

https://www.esa.int/ESA_Multimedia/Images/2019/03/The_two_mysterious_populations_of_NGC_2419

https://academic.oup.com/mnras/article/414/4/3381/997839

Original
B
D
Final
E
F

B

Description: An attempt to get more resolution in the cluster's core. This revision is based on the result of Pixinsight Image Integration process and is not downsampled. The original revision is based on CFA Drizzle Integration result. Somehow the Image Integration process produced smaller stars.

Uploaded: ...

D

Description: More PixInsight experiments. This revision is based on the CFA drizzle integration. The integrated color image has been split to the luminance and color components. Deconvolution has been applied to the luminance. Then the luminance was applied to the RGB image with LRGB combination process.

Uploaded: ...

E

Description: Reprocessed from scratch using the same processing steps as with the last "M13 2020" image. I guess this is all I can do with the NGC2419 data. It is a much more difficult object than M13 :)

Uploaded: ...

F

Description: I thought that it would be interesting to put things in perspective and compare the NGC2419 globular cluster with the famous M13. The image scale is the same for both clusters. In fact the radius of NGC2419 is about 3 times greater than the radius of M13: 260 vs 84 light years according to Wikipedia. The full version of M13: The Great Globular Cluster in Hercules, March 2020

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Status	Advanced success
Started	...
Astrometry.net job	3388649
PixInsight job	GVWTFHGI7A0ISKFVBJPDF14Y04QV7HI7
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	07h38m06s.708
RA (top/left)	07h39m14s.733
RA (top/right)	07h36m53s.940
RA (bottom/right)	07h36m59s.300
RA (bottom/left)	07h39m19s.764

Dec (center)	+38°52′25″.57
Dec (top/left)	+39°01′58″.31
Dec (top/right)	+39°00′20″.99
Dec (bottom/right)	+38°42′49″.94
Dec (bottom/left)	+38°44′27″.50

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