Palomar 5 in Serpens
Type: Globular Cluster
Magnitude: 11.8
Apparent Size: 8'
Distance: 75.6 kly
Physical size: ~152 ly
Distance: 75.6 kly
Physical size: ~152 ly
Sky Brightness ~18.25 mag/arcsec^2
Ambient Temp: 58F- 56F
Processing Notes:
Camera: Starlight Xpress SX-694 (2x2 binning)
Guider: Starlight Xpress Lodestar off-axis.
Scope: Astrotech AT10RC @F/8 (2000 mm)
Guider: Starlight Xpress Lodestar off-axis.
Scope: Astrotech AT10RC @F/8 (2000 mm)
Mount: Losmandy Titan w/Gemini-2
Filters: Astronomik L type 2c.
Exposures: L= 13 x 120 seconds
Acquired, calibrated, stacked (Median) in Astroart 8
Exposures: L= 13 x 120 seconds
Acquired, calibrated, stacked (Median) in Astroart 8
Processing Notes:
Calibrated with Flats, Bias & Defect Map
Linear Gradient removal to correct for light pollution.
Images were taken (mistakenly) without the cooler enabled so the subs were noisy. Bias, Flats and Darks were subsequently taken with the roughly the same temperature to salvage the data. The image is clipped considerably to mask the noise. Median stacking was used since a few satellite trails spoiled some images. There is also a noticeable elongation of the stars which may have been due to mis-collimation or poor polar alignment.
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