M57 in Hydrogen Alpha

Uploaded 6/21/02

This is a single 10 minute subframe I got in before we got winded out. I intend to reshoot this object next dark of the moon with much longer exposures. Note the halo of material around the main body of the nebula.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST7E w/Enhanced Cooling
Exposure:  L = 10m
Filters:  Ha
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FMHW = 4 arcsec, Transparency 8/10
Outside Temperature:  20 C
CCD Temperature:  -15 C
Processing:  Maxim DL, Photoshop, AIP4WIN, PW Pro.
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