CCD image of globular star cluster Palomar Number 4 taken with an ST-6 CCD camera thru Kopernik's 20 inch F/8.1 telescope. The field of view is about 5x7 arc minutes. Exposure = 10 minutes.
This is one of extremely dim globular star clusters found on the survey photographs taken with the 48 inch Schmidt Camera at Palomar Observatory. Note that the dimmer stars in the cluster are dimmer than 20th magnitude.
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