The galaxy cluster Arp 99
Red-band image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Cambridge , Arp 99 is visible in the evening sky, becoming accessible around 17:35 (EST) as the dusk sky fades, 55° above your south-eastern horizon. It will then reach its highest point in the sky at 19:32, 66° above your southern horizon. It will continue to be observable until around 00:44, when it sinks below 22° above your western horizon.
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Name
Arp 99
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Object Type
Galaxy Cluster
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Other Names
HCG 93