Messier 57
Messier 17 Messier 27 Messier 42 Messier 57 NGC 2261 NGC 7635 IC 434 M97 IC 5146 NGC2392 NGC 1514 NGC 6781
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Image by Kevin Hearst 

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:  None
  • 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 1999-2012 by Kevin Hearst.
Commercial use of these images without the prior written consent or knowledge of the author is strictly prohibited.