Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  NGC 4651
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Arp 189 - NGC 4651 umbrella galaxy, 



    
        

            Michael Lorenz
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Arp 189 - NGC 4651 umbrella galaxy

Getting plate-solving status, please wait...
Arp 189 - NGC 4651 umbrella galaxy, 



    
        

            Michael Lorenz
Powered byPixInsight

Arp 189 - NGC 4651 umbrella galaxy

Technical card

Imaging telescopes or lenses: William Optics FLT 123

Imaging cameras: Atik 460EX mono

Mounts: SkyWatcher AZ EQ6

Focal reducers: TS 2.5" Full Frame Flattener

Software: Seqence Generator Pro  ·  Pleaides Astrophoto PixInsight

Filters: Baader Planetarium LRGB 1.25"

Accessory: Lacerta Motorfokus


Dates:April 6, 2018

Frames:Baader Planetarium LRGB 1.25": 30x600" (5h) -10C bin 1x1

Integration: 5h

Avg. Moon age: 20.53 days

Avg. Moon phase: 66.89%

Bortle Dark-Sky Scale: 3.00


Astrometry.net job: 2011832

RA center: 12h 43' 50"

DEC center: +16° 23' 3"

Pixel scale: 1.955 arcsec/pixel

Orientation: 163.239 degrees

Field radius: 0.609 degrees


Resolution: 1737x1421

Data source: Traveller

Description

Arp 189 or NGC 4651 is also known as the "umbrella galaxy" due to its plume extending towards the right and left (barely visible in my image) of the galactic disc. The right plume extends about 50000 light-years into space. The structure is a remnant of an interaction with a smaller galaxy, that NGC 4651 consumed, thus only the main galaxy is visible today.

I was having problems getting the color right in this image. I am not very satisfied with the core/arms of the galaxy. Needs more data for rgb

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