Horsehead IC1848 Horsehead

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Date: October 17, 2004
Exposure: Ha (3nm) 280m : 14 x 1200s
Processing: Image acquisition with CCDSoftV5, MaxIm for Image calibration,(16 flats dark subtracted and Sigma Reject combined, 25 bias frames Sigma Reject combined, 15-1200s darks Sigma Reject combined), dead/hot pixel removal, alignment, normalization. Photoshop CS for final processing and jpg conversion.
Conditions: Clear, Mag 3-4 Skies
Scope: Tak FSQ-106N, f/5 (2.65 arcsec/pix), Vixen 102mm Flourite @ f/9 for guiding.
Camera: SBIG ST-10MXE, -20°, SBIG ST-237A for guiding
Comments: IC1848 is a cluster associated with nebulosity in Cassiopeia. Dreyer description: Cluster, stars faint, extends 8th magnitude eastward, in faint nebulosity. RA: 02h 51m 12.0s Dec: +6026'00" (Epoch 2000) Size:60.0'. This is the eastern end of the nebulosity which contains some of the more interesting Ha formations. Taken in clear skies with good tranparency but poor seeing. I could not get my C14/ST-8XE at 0.76"/pix to focus, so I switched to wide field and was able to salvage the night.