Stephenson 1 is a loose open cluster in Lyra centered around the wide double star Delta Lyrae which consists of Delta 1, the blue main sequence star of spectral type B2.5V and Delta 2, the variable Red Giant. It has been debated whether or not this star is a true binary (probably no) and whether or not this sparse open cluster is a true cluster (probably yes).

Imaging Camera: QSI640wsg
Imaging Scope: Celestron 9.25"Edge HD at f/7
Guide Camera: SX Lodestarx2
Mount: Avalon M-Uno Fast Reverse
Filters: Astrodon Gen II LRGB
Exposure: 45 mins luminance, 60 second subs, 45 mins each RGB, 60 sec subs binx2
Capture: APT
Processing: CCD Stack and PS CC
Date: 6/26/20
Sky conditions: Below average seeing, bortle white skies, SQM 17.8 mag/arc-sec2
Location: My front driveway. Morristown, NJ