Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC 3943  ·  IC 3946  ·  IC 3947  ·  IC 3949  ·  IC 3955  ·  IC 3959  ·  IC 3963  ·  IC 3973  ·  IC 3976  ·  IC 4026  ·  IC 4040  ·  IC 4041  ·  IC 4042  ·  IC 4045  ·  IC 4051  ·  NGC 4850  ·  NGC 4854  ·  NGC 4860  ·  NGC 4864  ·  NGC 4865  ·  NGC 4867  ·  NGC 4869  ·  NGC 4871  ·  NGC 4872  ·  NGC 4873  ·  NGC 4874  ·  NGC 4883  ·  NGC 4886  ·  NGC 4889  ·  NGC 4894  ·  And 9 more.
Getting plate-solving status, please wait...
Abell 1656 Coma Galaxy Cluster, 



    
        

            Doug Summers
Abell 1656 Coma Galaxy Cluster
Powered byPixInsight

Abell 1656 Coma Galaxy Cluster

Getting plate-solving status, please wait...
Abell 1656 Coma Galaxy Cluster, 



    
        

            Doug Summers
Abell 1656 Coma Galaxy Cluster
Powered byPixInsight

Abell 1656 Coma Galaxy Cluster

Technical card

Imaging telescopes or lenses: Celestron RASA 11

Imaging cameras: ZWO ASI183MC Pro

Mounts: Celestron CGX-L

Guiding telescopes or lenses: Generic 60mm Guidescope

Guiding cameras: ZWOASI120mm mini Guidecam

Software: PixInsight, CCD Inspector, Kstars/Ekos

Filters: Hoya UV-IR Block

Accessory: ZWO EAF Electronic Focuser


Dates:April 13, 2021May 7, 2021May 8, 2021May 9, 2021May 10, 2021

Frames: 270x45" (3h 22' 30") (gain: 50.00) -15C

Integration: 3h 22' 30"

Avg. Moon age: 21.86 days

Avg. Moon phase: 6.74%

Mean FWHM: 3.14


Basic astrometry details

Astrometry.net job: 4646120

RA center: 12h59m53s

DEC center: +27°5725

Pixel scale: 0.399 arcsec/pixel

Orientation: 14.025 degrees

Field radius: 0.472 degrees


Resolution: 7324x4325

Locations: TAAA CAC, Pearce, AZ, United States

Data source: Traveller

Description

The Coma Galaxy Cluster may not be very pretty, but it has "mind blowing" appeal. The cluster is on the order of 320 million light years distant, and is 20 million light years in diameter. It contains thousands of galaxies (possibly 10,000?), each galaxy of which contains billions of stars! The whole cluster is speeding away from us at a rate of ~15 million miles per hour! The two monster ellipticals in the center of the image are NGC 4874 and NGC 4889. They are each 2 to 3 times bigger than the Milky Way. The Coma Galaxy cluster is famous for identifying "dark matter" (Zwicky, 1933). It took 50 years to gain acceptance of the theory. About 90 percent of the Coma cluster's total mass is believed to be in the form of dark matter.

It's hard to believe that amateur equipment can get such good images of objects that are so distant, but here we are. This object was captured over multiple nights at the TAAA CAC dark site in Arizona. I will likely return to this object to form a much "deeper" image in the future. I've left the background intentionally a bit higher in the image than I normally would to highlight all those fainter fuzzies.

Comments

Revisions

  • Abell 1656 Coma Galaxy Cluster, 



    
        

            Doug Summers
    Original
  • Final
    Abell 1656 Coma Galaxy Cluster, 



    
        

            Doug Summers
    B

B

Description: A bit darker version, plus some work to bring out details in a couple spirals.

Uploaded: ...

Sky plot

Sky plot

Histogram

Abell 1656 Coma Galaxy Cluster, 



    
        

            Doug Summers