Focal Pointe Observatory
Astrophotography by Bob Franke

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NGC 1528 - Cluster

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Click the image for a 50% size view. (1800 x 1200 - 1.04 MB)

Instrument

12.5" RCOS @ ~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at  1.28 and 3.11 arcsec/pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ FW8 filter wheel & AstroDon Gen-2 RGB filters.

Acquisition Data

12/17/2015 to 2/12/2016 Chino Valley, AZ.  with CCD Commander & CCDSoft.  AOL guided

Exposure

RGB

 675 min (15 x 15 min. each) Bin 1x1

eXcalibrator RGB ratios are 1.00, 0.96 & 1.19

Software & Processing Notes

  • CCDSoft, CCDStack, PixInsight, Photoshop CS6.

  • eXcalibrator v5.0 for (g:r) color balancing, using 189 stars from the APASS database.

  • CCDBand-Aid to repair KAI-11000M vertical bars.

  • CCDStack to calibrate, data reject and combine the sub exposures, create the RGB image.

  • PixInsight for gradient removal, non-linear stretching with HistogramTransformation.

  • PhotoShop for the final touch-up.

Comment

 

The north is to the right.

 

NGC 1528 is an open cluster in the constellation Perseus. William Herschel discovered the cluster in 1790. It has about 165 stars and is 1500 to 2500 light years away. NGC 1528 as an estimated age of 270 to 370 million years.