NGC5905 & NGC5908

Spiral Galaxies in Draco

Uploaded 6/23/2001

Draco contains some of the most detailed and challenging galaxy groups in the sky. This pair, near the star Thuban shows a splendid contrast between a face on spiral and a nearly edge on of nearly the same angular size. The face on to the upper right is NGC5905, a 12.5 magnitude SBb class spiral, 4.7x3.6' in size. A yellow bar of population I stars marks the center, with blue Population II stars marking the star forming regions in the arms. There is a slight greenish cast to the area where the yellow bar intersects the blue arms.

To the lower left is NGC5908, a 12.8 mag type Sb spiral, seen inclined only 7 degrees. 3.2' long, the galaxy boasts a strong thin dust lane and a yellow disk, with white tipped arms.

Special processing included the use of DDP to preserve the spherical galactic halo around NGC5908, and the inner especially bright disk and core.

Instrument:  12.5" f/5 Home made Newtonian
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  LRGB = 70:20:20:20 (RGB Binned 2x2)
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing 8/10, Transparency 8/10
Outside Temperature:  70 F
CCD Temperature:  -20 C
Processing:  Maxim DL, Photoshop, PW Pro, CCDSharp.




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