Abell 1656 - The Coma Cluster

The image below is of the galaxy cluster Abell 1656 - the Coma Cluster. Below the image is a list of all the galaxies identified within the image.

This is the sum of four exposures obtained using the SLOOH Dome 1 HM camera with the Planetary Nebula setting. The images were captured 20th and 22nd June 2007. The four images were stacked using MAXIM DL, de-noised using Neat Image and PSP was used to adjust contrast and add labels. Unfortunately one of the images had a satellite streak and there are several other 'artefacts' visible. The objective was to find out how many galaxies could be identified in this field of view, (as part of a contest running in the SLOOH forum).

The Galaxies were identified using Aladin with the LEDA Hypercat and NED catalogues. The stated magnitude is the 'bt' magnitude from LEDA or 'Magnitude and filter' from NED. The faintest object is Mag 20.07. The recession velocity is Heliocentric and the highest is 58,579 km/s.

I know there are few more galaxies there if you want to squint at the screen!

A - artefact due to the 'afterglow' of previous exposure. ? - does not look like an artefact but is not on any chart.

Galaxies

No. Name

Mag

RV km/s

1 IC3955 15.36 7693
2 PGC044546 17.00 6978
3 PGC044533 17.03 8301
4 PGC044522 16.49 5688
5 PGC126809 18.00 5766
6 GMP 3899 19.22  
7 GMP 3993   43552
8 PGC044547 16.43 6432
9 PGC126801 18.05 7812
10 IC3960A   6835
11 IC3960 15.89 6625
12 PGC126804 18.55 20074
13 IC3949 15.08 7569
14 GMP 3980 19.39 35268
15 GMP 4005   43785
16 PGC126811 17.53 8651
17 PGC044518 16.62 5377
18 IC3946 15.10 5866
19 GMP 3925

17.44

 6448

20 IC3947 15.64 5696
21 PGC044519 16.57 6742
22 IC3959 15.23 7115
23 PGC1817584 17.60  
24 IC3957 15.78 6337
25 IC3963 15.61 6848
26 PGC126791 17.85 6618
27 PGC044608 16.67 7825
28 PGC126805 18.59 25400
29 PGC126787 17.09 6760
30 GMP 3356 19.24  
31 PGC083734 17.38 6231
32 IC3976 15.69 6852
33 GMP 3473 18.92 4827
34 PGC126789 18.12 4628
35 PGC2816216 17.53 6273
36 PGC044654 16.62 3808
37 PGC044653 17.76 17450
38 PGC126784 17.44 6184
39 PGC044662 15.96 8103
40 PGC126780 19.75 49783
41 PGC044676 17.44 7891
42 GMP 3196 18.35 6847
43 NGC4876 15.38 6666
44 NGC4875 15.67 8043
45 PGC044649 16.54 6888
46 GMP 3336 18.47 13098
47 IC3973 15.37 4732
48 PGC044585 16.30 5075
49 PGC044581 16.30 6470
50 NGC4869 14.37 6847
51 PGC126794 18.56 6812
52 PGC126799 18.50 6450
53 GMP 3629 19.03 5219
54 PGC044595 17.64 7820
55 NGC4871 15.26 6783
56 NGC4872 14.58 7198
57 NGC4874 12.76 7173
58 PGC044644 15.44 8066
59 PGC044652 16.35 6933
60 PGC044651 16.76 7554
61 IC3998 15.56 9440
62 PGC044656 16.18 6682
No. Name Mag RV km/s
63 PGC044635 17.66 5416
64 PGC044636 15.73 6851
65 NGC4873 15.12 5779
66 PGC044598 16.18 6118
67 PGC044597 16.70 7552
68 PGC044576 17.34 6400
69 PGC1822852 18.02 7139
70 NGC4867 15.39 4847
71 NGC4864 14.52 6822
72 GMP 3615 18.82 47487
73 PGC044594 16.60 6685
74 PGC126792 18.20 5495
75 PGC044666 17.08 9822
76 PGC044675 16.37 7724
77 GMP 3061    
78 PGC044699 15.69 6580
79 PGC083740 17.35 8247
80 PGC044704 16.03 6218
81 PGC126767 17.59 8664
82 PGC083745 16.78 6978
83 PGC126760 17.29 5282
84 PGC1819490 17.78 7794
85 PGC044716 16.11 5119
86 PGC044709 16.50 9856
87 PGC126762 17.55 7439
88 GMP 2635 19.04  
89 GMP 2698 19.74  
90 GMP 2716 19.79  
91 PGC126758 18.21 4878
92 PGC126756 17.92 7943
93 PGC044741 16.31 5281
94 NGC4898A 15.55 6903
95 NGC4898 15.54 6661
96 PGC044763 16.41 7020
97 PGC044771 16.22 7700
98 NGC4894 16.04 4574
99 PGC1822502 18.01 26416
100 PGC126768 18.64 6267
101 PGC126771 17.97 5279
102 GMP 2964 17.74 7791
103 PGC044708 17.12 7783
104 NGC4882 14.78 6338
105 IC4011 16.08 7228
106 GMP 3966 19.40 47719
107 GMP 3973 18.66 6715
108 GMP 3308 18.98  
109 PGC1821898 18.57 4193
110 GMP 3311 18.89 6189
111 GMP 3284 20.00 53206
112 GMP 3275 18.66 3834
113 GMP 3174 19.78  
114 GMP 3095 20.07 58579
115 PGC1821341 18.58 7195
116 PGC044693 17.80 6940
117 PGC044692 18.56 5985
118 PGC126769 18.88 7726
119 PGC126770 18.95 13272
120 NGC4884 12.48 6486
121 GMP 2800 17.31 7015

 

 


Tony Evans 2004-2011

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