Messier 57
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Image by Kevin Hearst 

Messier 17
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Messier 57
NGC 7635
IC 434
M97
IC 5146
NGC2392
NGC 6781
NGC 1514

Messier 57 - NGC 6720

"Ring Nebula"

  • TYPE:  Planetary Nebula
  • RA: 18h 53.6'
  • DEC:  +33degrees 02'
  • SIZE:  77"
  • VISUAL MAGNITUDE:  8.8
  • CENTRAL STAR:  15.29
  • CONSTELLATION:  Lyra
  • DISTANCE:  1,500  Light Years
  • DIAMETER:  0.5 Light Years

IMAGING INFORMATION

  • TELESCOPE:  RCOS 10 Carbon R/C, Ritchey-Chretien reflector, on Paramount GT1100 mount.
  • REDUCER/CORRECTOR:  None - Operating at focal length of 9.0
  • CAMERA:  Santa Barbara Instruments, ST-8XME Digital (Thermoelectrically cooled)
  • ADAPTIVE OPTICS:  None
  • FILTER(S):  Luminence, Red, Green, Blue (Astrodon)
  • CCD COOLING TEMPERATURE:  -15 C
  • BINNING/RESOLUTION:  1 X 1 (1530 X 1020) L - 2 X 2 (765 X 510 resized to 1530 X 1020) RGB
  • EXPOSURE TIME:  L = 10 -  5 minute subframes, RGB 10 - 3 minute subframes (each color)   (2 hours, 20 minutes total)
  • NUMBER OF IMAGES:  40
  • FILM SPEED:  N/A
  • DATE/TIME:  05-24-2006
  • LOCATION:  Valley Center, San Diego County, California
  • TEMPERATURE:  61 Degrees
  • HUMIDITY:  34 Percent

 

All the images in this site are Copyright 1999 to Infinity by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited..