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M7 in Scorpius

 

 

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Scope: Megrz II 80 mm APO at f/5.0; Location: Dos Picos Park, Ramona, CA;  31 May. 2008; Camera: Canon XT 350D (Un-modified)

Exposure: 13 x 120 sec (no filters) ISO 800, 6 Darks, no Flats and 8 x240 sec (no filters) at ISO 800, 4 Darks, no Flats

Processing: Images were captured with DSLR Focus  and saved as RAW file format. Images were decoded and dark corrected in IRIS. Images were aligned and stacked in IRIS with Sigma Median. Dark point equalization and rough color balance  was done in IRIS. Color saturation, and gamma adjustments also done in Iris. Image was saved as Tiff. Final stretching and touch up was done in PhotoShop.  Final Image size is approximately 3474x2314

North is up in this image. The image was taken with fairly good conditions at a moderately light polluted site. This is a guided image.  M7 can be seen with the naked eye and has been known as early as 130AD by Ptolemy. The common name for this cluster is Ptolemy's. This clusters age is estimated at 220 million years and it is 800 light years distant from Earth. In this field, there is the Milky Way field as a background. Also in this image on the right is a small globular cluster (NGC 6453) and a more distant open cluster (NGC 6444). . This image complements a Webcam image that can be seen here . Horizontal FOV is 178'

Object Center is approximately - Equatorial 2000: RA: 17h 53m 54s Dec: -3449'00"

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