Scope: C8 f/2.8; Location:
Del Mar CA; 04 Apr. 2005; Camera: ToUcam SC3
Exposure: 16 x 48 sec and 16 x 16 sec with Orion Skyglo and Baader IR
Block for Luminance exposures; 16 x 16 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 channel was constructed with the with the 48 sec
exposure as the base exposure; the 16 sec exposure was used to reduce star size
on the larger stars. LRGB channels were resized to 800x600 prior to LRGB
combine. Final LRGB combine was done in Photoshop using Luminance Layering (or
balancing and final touches were done in Photoshop (Blue halo subtraction and
background noise subtraction). SGBNR (PixInsight LE) was used to smooth
remaining background on the final result. Final image size is approximately 800x600.
This image was a guided exposure. M67 is the cluster in the image. It
is located in the constellation Cancer. M67 is one of the oldest known open
clusters; many younger open clusters have predominantly blue stars, but M67
contains many red colored stars North is up in this image. This is a second image of this
cluster, the original image can be seen in the Archives
here. Horizontal FOV is about 30'.
Image center is at Equatorial 2000: RA: 08h 51m 24s Dec: +11°49'00"