Horsehead M100 Horsehead

(Click on image for Full Resolution)

Date: March 22, 2004
Exposure: LRGB 500:60:60:90 : 50 x 600s L 4 x 900s R,G, 6 x 900s B
Processing: Captured with CCDSoftV5, MaxIm for Image calibration,(20 R,G,B flats dark subtracted and Sigma Reject combined, 40 bias frames Sigma Reject combined, 10-1800s darks Sigma Reject combined), dead/hot pixel removal, alignment, normalization. Photoshop for final RGB combine, levels and curves adjust and conversion to jpg for website.
Conditions: Clear with fair transparency, but poor seeing.
Scope: C14 @ f/7
Camera: SBIG ST-8XE, -25°, SBIG ST-237A for Guiding
Comments: M100 is one of the brightest member galaxies of the Virgo Cluster of galaxies. It is a spiral galaxy, like our Milky Way, and tilted nearly face-on as seen from earth. Captured over several nights under less than optimum conditions, The C14 did a good job getting what it did.