NGC 1807 and NGC 1817 in Taurus


Scope: Megrez II  f/4.1;  Location:  Del Mar  CA;  14 Mar. 2005; Camera: ToUcam SC3

Exposure: 20 x 30 sec with Orion Skyglo and  Baader IR Block Filter and 20 x 20 sec / 20 x 8 sec with Baader IR Block Filter for Luminance exposures; 15 x 20 sec R,G,B exposures.

Processing: All exposures captured  in K3CCDTools 2. Alignment and stacking was done with Registax 3 and saved as FITs. LRGB channels were co-registered in IRIS. Luminance and Color channels were scaled and rough color balanced in IRIS.  The  luminance exposures was constructed with the with the 20 sec exposure as the base exposure; the 36 sec luminance skyglo filtered exposure was combined to reduce star size on the brighter stars. The 8 sec  exposure was not used. LRGB channels were resized to 800x600. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Color balancing and final touches were done in Photoshop. SGBNR (PixInsight LE) was used to smooth background noise on the final result. final image size is approximately 800x600.

This image was an unguided exposure. NGC 1807 the smaller cluster in the lower right of this image consisting of a loose group of bright stars. NGC 1817 is the larger more rich cluster of stars in the upper left. Horizontal FOV is about 50'. 

Image center is at Equatorial 2000: RA: 05h 11m 37s Dec: +1636'21"



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