Double Cluster in Perseus



Scope: MegRez II  f/4.1 Location: Dos Picos Park, Ramona CA   3 Feb. 2005  Camera: ToUcam SC3

Exposure: 20 x 3 sec and 16 x 12 sec  Luminance with IR Block Filter; 12 x 16 sec RGB - 2 frame mosaic

Processing: Images were captured in K3CCDTools 2. Aligned/stacked in Registax 3 and saved as FITS. Luminance and Color channels were scaled and rough color balanced in IRIS. Channels were co-registered in IRIS.  The 12 sec IR block exposure was used as the main luminance channel; the 3 second exposure was used to minimize star size somewhat and to help with separation between close stars.  Luminance and Color FITS were combined in Photoshop with Luminance Layering. Mosaic join was done in Photoshop. Color balancing and final touches in Photoshop. SGBNR (PixInsight LE) was used to smooth background noise on  the final result. Image was resized to 1090 x 788.

This image was taken as an afterthought as I had different targets in mind this evening. The seeing was too poor for the narrow field targets I wanted, so instead I shot the Double Cluster in wide field. This was an unguided image. The catalog references for these clusters are NGC 884 (left) and NGC 869 (right). However, together they are more commonly known as the Double Cluster. This image replaces an earlier image taken in Nov. 2003 and can be seen in the archives here.  Horizontal FOV is 72'


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