Horsehead IC1848 Horsehead

(These are very large files - Broadband recommended on anything over the 50% size)

(Click on image for 50% Resolution)

(Click here for 100% of full size - 1.4MB)

(Click here for my 2004 Ha wide field version with my FSQ-106N and ST-10XME)

Date: October 02-04, 2006
Exposure: OIII, Halpha, SII : 240:330:360 8, 11, 12 x 1800s
Processing: CCDSoftV5 for image acquisition, CCDStack for Image calibration, Astrodon Narrowband filters (5 flats each Ha, OIII, SII, Bias subtracted and Sigma Clip combined, 60 bias frames Sigma Clip combined, 15 1800s darks Sigma Clip combined), alignment, normalization, FITS files creation. Photoshop CS2 for color mapping and jpg conversion. CCDAutoPilot3 used to collect data over multiple nights.
Conditions: Clear, Mag 3-4 Skies
Scope: RCOS 16" Truss
Camera: SBIG STL-6303, -15°, OAG with Remote Guide Head
Comments: I used the "Hubble" palette which matches Red to SII, Grenn to Halpha, and Blue to OIII. 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, and this is my favorite area. Taken in clear skies with good tranparency and good seeing seeing. FWHM being reported by CCD Inspector was running between 1.7 to 2.3" over the 30 min. exposures. I threw out the exposures that were over 2.3" as the stars we starting to get fat. This image could benefit from additional OIII which I will collect next time the weather clears.