Sketching at the telescope: Phil Harrington’s Hercules Cluster

on Thursday, May 6, 2010

The Hercules Cluster (M13) sketched by Phil Harrington on April 22, 1988, with a 13.1-inch f/4.45 reflector at 87x. David J. Eicher library

Out of my newly found cache of astronomical drawings (which had resided in a box in my basement for the past 20 years) today comes a sketch made by Astronomy magazine Contributing Editor Phil Harrington. Phil drew the Hercules Cluster (M13) with his 13.1-inch reflector in 1988 and noted it as a “beautiful globular cluster with stars resolved across the disk. Four distinct ‘star arms’ were noted, as were two nearly perpendicular ‘dark lanes.’"

To learn more about astronomical sketching, Astronomy magazine subscribers can access my Astronomy.com video "Sketching from the telescope" and read Glenn Chaple's Observing Basics column "Sketching 101."

See the rest of the Sketching at the telescope series.

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Sketching at the telescope: Phil Harrington’s Hercules Cluster