Help on history of the polar diamond ring asterism
urban astronomer wrote:
As far as I know it was Burnham. Phil Harrington has it listed
unofficially in his book "Touring the Universe thru Binoculars" as
"Harrington 1"
Thanks, urban, TUBA is where I picked it up, but I could not find it in
Burnham's Celestial Handbook. - Canopus56
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