Michael Purcell's Astrophotography

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Abell 426 Galaxy Cluster with Perseus A(NGC1275)
Caldwell 24

Abell 426

(Click on the picture above to go to the main image.)

This image shows a section of Abell Galaxy Cluster 426 in Perseus. There are at least 10 galaxies in this image. The bottom center galaxy is Perseus A (NGC1275), an extremely powerful radio galaxy that is second only to Centarus A in power. The smudge in the lower right corner is part of NGC1272. When I took this picture I was simply trying to capture the central part of the cluster. It was much later that I realized I had also picked up Perseus A. Based on the charts in the Webb Society Deep Sky Handbook I have blackened out all objects I know to be stars. Therefore, almost everything visible in this image is a galaxy. The dimmer galaxies here have magnitudes of about 14.5; not bad for
Astrophotography!

Constellation Perseus
Right Asc (hh:mm:ss) 3:16:24
Declination(deg:sec) 41:20
Magnitude 12.7
Size (ArcMin) 2.6
Tirion SkyAtlas 2000 #4
Uranometria 2000 #63

CCD Camera Parameters

ST-7 Compressed Image
File_version = 3
Data_version = 1
Exposure = 15 minutes
Focal_length = 63.000
Aperture = 65.9400
Response_factor = 300.000
Note = Picture taken 11/24/95 at 02:25:57
Background = 379
Range = 211
Height = 510
Width = 765
Date = 11/24/95
Time = 02:25:57
Exposure_state = 37
Temperature = -19.98 C
Number_exposures = 1
Each_exposure = 15 minutes
History = DKF
Observer = Michael Purcell
X_pixel_size = 0.0090
Y_pixel_size = 0.0090
Pedestal = 0
E_gain = 3.00
User_1 = CCDOPS for DOS Version 2.05
Filter = None
Readout_mode = 0
Track_time = 0
Sat_level = 16383

This page last updated on October 12, 1996 Contact Michael Purcell

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