Quote from Dreyer's New General Catalog (NGC):
"Very faint, pretty large, very little extended, little brighter middle, among 4 stars."
Quote from The Deep Sky Field Guide to Uranometria 2000:
"Small, very bright nucleus, Small, two main filamentary knotty arms with one arm very massive and brighter."
NGC 7678 (aka Arp 28) is a face-on spiral galaxy in Pegasus with a short bar and a pseudo inner ring that is not quite complete. One of its spiral arms is nearly as massive as the rest of the galaxy. H. Arp included it in his catalog of peculiar galaxies in his sub-class of "spiral galaxies with one heavy arm". A rough distance estimate for NGC 7678 is 184 Million Light Years, and at that distance its true diameter would be about 116,000 light years.
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George Normandin, KAS
February 6th, 2001