Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 637
NGC637 Open Star Cluster, 


NGC637 Open Star Cluster
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NGC637 Open Star Cluster

Technical card

Imaging telescopes or lenses: Celestron C11 Celestron

Imaging cameras: 40D Canon

Guiding telescopes or lenses: 80mm EON Orion

Software: Deep Sky Stacker  ·  Noel's Tools  ·  5.00 Images Plus

Dates:Dec. 11, 2010

Frames: 14x60"

Integration: 0.2 hours

Avg. Moon age: 5.53 days

Avg. Moon phase: 30.84%

Basic astrometry details

Astrometry.net job: 571050

RA center: 1h 43' 1"

DEC center: +64° 4' 12"

Orientation: 67.945 degrees

Field radius: 0.378 degrees

Resolution: 850x553

Locations: Leesburg home, Leesburg , Florida, United States


NGC637 is an open cluster of stars in the constellation Cassiopeia. It has a Trumple13.1": rich cluster of two dozen stars arranged in an arc. There are five bright stars including a mag 10/11.2 double star at 9" separation. 8": 10 stars in cluster includes four mag 10 stars and fainter, mottled, over haze. At a distance of approximately 7,045 light years, this corresponds to a diameter of 9.8 light-years (3.0 pc). The estimated age of this cluster is 5–15 million years. Discovered by William Herschel 1787.
Observation Notes : 16 stars counted at 135X. Bright, pretty large, not compressed, pretty rich. Several of the brighter stars are about 10th mag. There is a lovely triangle of stars near the center. The cluster is easy in the 11X80 finder.



  • NGC637 Open Star Cluster, 


  • Final
    NGC637 Open Star Cluster, 



Sky plot

Sky plot


NGC637 Open Star Cluster,