Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC 3943  ·  IC 3946  ·  IC 3949  ·  IC 3955  ·  IC 3973  ·  IC 4040  ·  IC 4042  ·  IC 4045  ·  IC 4051  ·  NGC 4860  ·  NGC 4864  ·  NGC 4865  ·  NGC 4869  ·  NGC 4871  ·  NGC 4873  ·  NGC 4874  ·  NGC 4881  ·  NGC 4883  ·  NGC 4886  ·  NGC 4889  ·  NGC 4895  ·  NGC 4898  ·  NGC 4907  ·  NGC 4908  ·  NGC 4911  ·  NGC 4919  ·  NGC 4921  ·  NGC 4923  ·  NGC 4927
Getting plate-solving status, please wait...
Abell 1656 Coma Cluster, 



    
        

            Billy Liang
Abell 1656 Coma Cluster
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Abell 1656 Coma Cluster

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



    
        

            Billy Liang
Abell 1656 Coma Cluster
Powered byPixInsight

Abell 1656 Coma Cluster

Technical card

Imaging telescopes or lenses: AG Optical 12.5" iDK F/6.7

Imaging cameras: QHYCCD QHY600M

Mounts: Astro-Physics AP900 GTO CP4

Guiding telescopes or lenses: AG Optical 12.5" iDK F/6.7

Software: APCC Pro  ·  Sequence Generator Pro, v3.0  ·  PixInsight Processing Software

Filters: Astrodon LRGB HA 3n SII 5nm OIII 5nm NII 5nm

Accessory: Moonlite Nitecrawler WR35


Dates:April 16, 2021

Frames: 168x600" (28h)

Integration: 28h

Avg. Moon age: 3.93 days

Avg. Moon phase: 16.45%


Basic astrometry details

Astrometry.net job: 4417641

RA center: 13h 0' 13"

DEC center: +27° 59' 34"

Pixel scale: 0.736 arcsec/pixel

Orientation: 335.057 degrees

Field radius: 0.543 degrees


Resolution: 4437x2925

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

This is my first serious project with the new CMOS camera QHY600M with total 28 hours of exposure time between 4/9 and 4/16/2021.

With 2X2 binning on LRGB channels, the image scale is about 0.76"/pixel. The local seeing ranges between 1-2 arc seconds over these nights, and the RMS guiding errors is about 0.8" with my old faithful AP 900GTO and PEC on. My imaging configuration is a bit oversampled. 3X3bining would be more ideal, but the option is not available. Overall I am quite pleased with this camera. The noise level is very low and the sub frames are very clean.

L: 600s X 24; 1200s X 31

R: 600s X 26

G: 600s X 27

B: 600s X 29

Comments

Revisions

    Abell 1656 Coma Cluster, 



    
        

            Billy Liang
    Original
    Abell 1656 Coma Cluster, 



    
        

            Billy Liang
    C
  • Final
    Abell 1656 Coma Cluster, 



    
        

            Billy Liang
    D

Sky plot

Sky plot

Histogram

Abell 1656 Coma Cluster, 



    
        

            Billy Liang