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Contains:  NGC 4565, NGC 4562
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NGC 4565 Needle Galaxy, 





    
        

            Jerry Macon
NGC 4565 Needle Galaxy

NGC 4565 Needle Galaxy

Technical card

Resolution: 2734x1909

Dates:April 18, 2019

Frames:
Astrodon Gen 2 RGB 36mm: 55x100" (gain: 99.00) -15C bin 1x1
Astrodon Gen 2 RGB 36mm: 126x60" (gain: 99.00) -20C bin 1x1

Integration: 3.6 hours

Avg. Moon age: 13.69 days

Avg. Moon phase: 98.71%

Bortle Dark-Sky Scale: 4.00

Temperature: 10.00

Astrometry.net job: 2649785

RA center: 189.089 degrees

DEC center: 25.990 degrees

Pixel scale: 0.700 arcsec/pixel

Orientation: 357.999 degrees

Field radius: 0.324 degrees

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Images from the following two scope/camera combinations contributed to this image:
AG12+ASI1600MM at .70 asec/pix
TV127is+ASI183MM at .75 asec/pix.

Imaged 4/18 with a full moon, which does not seem to have mattered much.

They were all registered to the best R image taken on the AG12+ASI1600MM.
L was created synthetically from the integrated RGB images. I have L from the TV127is+ASI183MM which were good quality, except for some ugly rings since I have not been able to clean any of the optics for many months. One of the problems with operating the observatory from 2000 miles away. Fortunately I will be back there soon to do some maintenance.

NGC 4565 (also known as the Needle Galaxy or Caldwell 38) is an edge-on spiral galaxy about 30 to 50 million light-years away in the constellation Coma Berenices. It lies close to the North Galactic Pole and has a visual magnitude of approximately 10. It is known as the Needle Galaxy for its narrow profile. First recorded in 1785 by William Herschel, it is a prominent example of an edge-on spiral galaxy.

Characteristics
NGC4565 is a giant spiral galaxy more luminous than the Andromeda Galaxy. Much speculation exists in literature as to the nature of the central bulge. In the absence of clear-cut dynamical data on the motions of stars in the bulge, the photometric data alone cannot adjudge among various options put forth. However, its exponential shape suggested that it is a barred spiral galaxy. Studies with the help of the Spitzer Space Telescope not only confirmed the presence of a central bar but also showed a pseudobulge within it as well as an inner ring.

NGC 4565 has at least two satellite galaxies, one of which is interacting with it. It has a population of roughly 240 globular clusters, more than the Milky Way.

NGC 4565 is one of the brightest] member galaxies of the Coma I Group.
(Wikipedia)

Comments

Author

jmacon
Jerry Macon
License: Attribution Creative Commons
3431
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NGC 4565 Needle Galaxy, 





    
        

            Jerry Macon