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NGC2024, IC434/B33 (#2)

Subject: NGC2024 and IC434/B33 -- Flame Nebula and Horsehead Nebula


Image FOV = 3.2 degrees by 2.25 degrees (192 by 135 minutes)


Image Scale = 7.5 arc-second/pixel


Date: 2006/11/22 and 2006/11/25 (RGB), 2006/12/02, 2007/01/16, and 2007/01/17 (Ha)


Exposure (RGB): 70 x 4minutes = 4h40m total exposure, ISO800, f/4.8

Exposure (Ha): 40 x 10 minutes = 6h40m total exposure, ISO800, f/4.8


Filter: IDAS LP filter (RGB), Baader 7nm H-alpha filter (Ha)


Camera: Hutech-modified Canon 30D


Telescope: SV80S 80mm f/6 + TV TRF-2008 0.8X reducer/flattener = 384mm FL, f/4.8


Mount: Losmandy G-11


Guiding: ST-402 autoguider and SV66 guidescope. MaximDL autoguiding software using 1-second guide exposures


Processing: Raw conversion and calibration with ImagesPlus (dark frames only, no bias or flat frames); Aligning and combing with Registar; H-alpha data replaced RGB red channel, levels, curves, crop/resize, JPEG conversion with Photoshop CS.


Remarks: temperatures at end: 20F, 21F, 25F, 25F, 27F


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Taken on October 10, 2007