Select an image size for a larger view:

800 x 600

1200 x 800

This is my first attempt at such a small deep sky object, a mere 9 arc seconds in diameter. Its tiny bluish disk is a bright 12.6 magnitude, and boasts several important details. It is a tiny ring nebula with a very small star on its top left edge. The 15th mag central star is not seen here. Best seen in the largest image, a small spiral galaxy is the only other charted object in the field. It lies to the upper left about 2 inches, and is 16th magnitude MAC 0356+3355, a nice little yellow edge on spiral.

Instrument:  12.5" f/5 Home made Newtonian
Platform:  Astrophysics 1200 QMD
CCD Camera:  SBIG ST8i NABG
Guider: SBIG ST4
Exposure:  LRGB = 80:20:20:40 Synth. Lum.
RGB Combine Ratio:  1: .8: 1.2
Filters:  RGB Tricolor
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing FWHM = 3.5 arcsec (Maxim DL - 10min subframe), Transparency 5/10
Outside Temperature:  0 C
CCD Temperature:  -20 C
Processing Tools:  Maxim DL,  Photoshop, AIP4WIN, PW Pro.

HOME   GALAXIES     EMISSION NEBS     REFLECTION NEBS   COMETS     GLOBULARS     OPEN CLUST     PLANETARIES     LINKS