Hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  NGC 3185  ·  NGC 3187  ·  NGC 3189  ·  NGC 3190  ·  NGC 3193
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Hickson 44, 



    
        

            KuriousGeorge
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Hickson 44

Getting plate-solving status, please wait...
Hickson 44, 



    
        

            KuriousGeorge
Powered byPixInsight

Hickson 44

Imaging telescopes or lenses: Planewave CDK24

Imaging cameras: FLI Proline 16803

Mounts: Planewave L600

Guiding cameras: Starlight Xpress Ultrastar

Focal reducers: None

Software: Planewave PWI3  ·  Planewave PWI4  ·  PixInsight 1.8  ·  Sequence Generator Pro  ·  Photoshop CS3  ·  PHD Guiding 2  ·  CCDWare CCD Inspector  ·  Maxim DL6

Filters: Astrodon 50mm B  ·  Astrodon 50mm R  ·  Astrodon 50mm L  ·  Astrodon 50 mm G

Accessory: FLI CFW-5-7  ·  Astrodon Monster MOAG  ·  Hedrick Focuser  ·  Planewave Delta-T  ·  Planewave EFA


Dates:Feb. 17, 2020Feb. 18, 2020Feb. 19, 2020Feb. 23, 2020

Frames:
Astrodon 50 mm G: 12x900" (3h) -30C bin 1x1
Astrodon 50mm B: 12x900" (3h) -30C bin 1x1
Astrodon 50mm L: 24x900" (6h) -30C bin 1x1
Astrodon 50mm R: 8x900" (2h) -30C bin 1x1

Integration: 14h

Darks: 20

Flats: 80

Flat darks: 80

Bias: 20

Avg. Moon age: 25.88 days

Avg. Moon phase: 18.36%

Mean SQM: 21.40

Mean FWHM: 1.60


Astrometry.net job: 3275250

RA center: 10h 18' 4"

DEC center: +21° 49' 12"

Pixel scale: 0.468 arcsec/pixel

Orientation: -178.142 degrees

Field radius: 0.288 degrees


Resolution: 3215x3057

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

Hard to believe the four prominent galaxies in this group are 100 million light-years distant! Selective star shrink helped preserve the far more distant ones.

My main reference...

Stephen Leshin Hickson 44

Skies were very dark, clear and steady for the 6 hours of luminance. Skies were also dark for RGB, but wind gusts were up to 10 mph. I deleted some R captures with aspect ratios close to 20% to help minimize noticeable red protrusions around the bright stars.

"Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies, now appropriately called Hickson Compact Groups. The four prominent galaxies seen here are one such group, Hickson 44, about 100 million light-years distant toward the constellation Leo. The two spiral galaxies in the center of the image are edge-on NGC 3190 with its distinctive, warped dust lanes, and S-shaped NGC 3187. Along with the bright elliptical, NGC 3193 at the right, they are also known as Arp 316. The spiral in the upper left corner is NGC 3185, the 4th member of the Hickson group. Like other galaxies in Hickson groups, these show signs of distortion and enhanced star formation, evidence of a gravitational tug of war that will eventually result in galaxy mergers on a cosmic timescale. The merger process is now understood to be a normal part of the evolution of galaxies, including our own Milky Way. For scale, NGC 3190 is about 75,000 light-years across at the estimated distance of Hickson 44."

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Hickson 44, 



    
        

            KuriousGeorge

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