Hemisphere:  Northern  ·  Contains:  10 Per  ·  7 chi Per  ·  8 Per  ·  Double cluster  ·  Misam  ·  NGC 869  ·  NGC 884  ·  NGC869  ·  NGC884  ·  The star 7Per  ·  The star 8Per  ·  chi Persei Cluster  ·  h Persei Cluster
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The Double Cluster, 


            Matt Harbison
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The Double Cluster

Imaging telescopes or lenses: William Optics FLT 132 Triplet APO WOFLT132

Imaging cameras: QHY 16200A

Mounts: Astro-Physics Mach 1 GTO

Guiding telescopes or lenses: William Optics FLT 132 Triplet APO WOFLT132

Guiding cameras: QHY-5-L-II-M QHY5-II Mono

Focal reducers: William Optics Reducer WO 0.80 #1

Software: PixInsight  ·  Adobe Photoshop photoshop PS  ·  Sequence Generator Pro  ·  Adobe Lightroom LR

Filters: Astrodon Tru-Balance LRGB E-Series Gen 2

Accessory: QHY Med OAG QHYOAG-M  ·  Moonlite DRO focuser&rotator Moonlite DRO Focuser & Rotator  ·  Optec Alnitak Flip-Flat Flat Fielder

Dates:March 8, 2019

Frames:Astrodon Tru-Balance LRGB E-Series Gen 2: 100x120" -15C bin 1x1

Integration: 3.3 hours

Darks: ~120

Flats: ~120

Bias: ~120

Avg. Moon age: 1.67 days

Avg. Moon phase: 3.11%

Bortle Dark-Sky Scale: 2.00

Astrometry.net job: 3527146

RA center: 2h 20' 9"

DEC center: +57° 13' 9"

Pixel scale: 1.665 arcsec/pixel

Orientation: -134.231 degrees

Field radius: 1.219 degrees

Resolution: 4466x2791

Locations: Marathon Motel, Marathon Motel, TX, United States; MaRIO, Marathon, Texas, None

Data source: Own remote observatory

Remote source: Marathon Remote Imaging Observatory (MaRIO)


The Double Cluster found in the constellation Perseus. Generally shot in the fall from North America, I shot this as it passed overhead in the winter months with short exposures to keep the stars in check.



Matt Harbison
License: None (All rights reserved)

Sky plot

Sky plot


The Double Cluster, 


            Matt Harbison