Messier 27
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Image by Kevin Hearst 
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Messier 27 - NGC 6853

"Dumbbell Nebula"

  • TYPE:  Planetary Nebula - Type 3 + 2
  • RA: 19h 59'
  • DEC:  +22degrees 43'
  • SIZE:  8.0' X 5.7'
  • VISUAL MAGNITUDE:  7.3
  • CENTRAL STAR:  13.80
  • CONSTELLATION:  Vulpecula
  • DISTANCE:  815  Light Years
  • DIAMETER:  2.1 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

To see the spectra of this object click here

 

 

IMAGING INFORMATION

  • TELESCOPE:  Celestron C-14 FL 3911 mm, Schmidt-Cassegrain reflector, on Paramont GT1100 mount
  • REDUCER/CORRECTOR:  Celestron 6.3
  • CAMERA:  Santa Barbara Instruments, ST-8 Digital (Thermoelectrically cooled)
  • ADAPTIVE OPTICS:  AO-7
  • FILTER(S):  None
  • CCD COOLING TEMPERATURE:  -5 C
  • BINNING/RESOLUTION:  1 X 1 (1530 X 1020)
  • EXPOSURE TIME:  60 minutes
  • NUMBER OF IMAGES:  1
  • FILM SPEED:  N/A
  • DATE/TIME:  06-13-2004 / 08:22:17 UTC
  • LOCATION:  Valley Center, San Diego County, California
  • TEMPERATURE:  Unknown
  • HUMIDITY:  Unknown

 

IMAGING INFORMATION

  • TELESCOPE:  RCOS 10 Carbon R/C, Ritchey-Chretien reflector, on Paramount GT1100 mount.
  • REDUCER/CORRECTOR:  Astro-physics 6.5
  • CAMERA:  Santa Barbara Instruments, ST-8 Digital (Thermoelectrically cooled)
  • ADAPTIVE OPTICS:  None
  • FILTER(S):  Astrodon H-a
  • CCD COOLING TEMPERATURE:  -15 C
  • BINNING/RESOLUTION:  1 X 1 (1530 X 1020) LRGB
  • EXPOSURE TIME:  135 minutes (1 1/4 hours) total, 5-15 min H-a
  • NUMBER OF IMAGES:  5
  • FILM SPEED:  None
  • DATE/TIME:  08-3-2005 & 08-4-2005
  • LOCATION:  Valley Center, San Diego County, California
  • TEMPERATURE:  61 Degrees
  • HUMIDITY:  34 Percent

 

IMAGING INFORMATION

  • TELESCOPE:  Celestron C-11, FL 2800 mm, Schmidt-Cassegrain reflector
  • REDUCER/CORRECTOR:  Celestron 6.3
  • CAMERA:  Santa Barbara Instruments, ST-8 Digital (Thermoelectrically cooled)
  • ADAPTIVE OPTICS:  None
  • FILTER(S):  Red, Green, Blue
  • CCD COOLING TEMPERATURE:  -15 C
  • BINNING/RESOLUTION:  2 X 2 (765 X 510)
  • EXPOSURE TIME:  12 minutes Red, 22 minutes Green, 45 minutes Blue,
  • NUMBER OF IMAGES:  3 combined to create a tri color image
  • FILM SPEED:  N/A
  • DATE/TIME:  08-15-1999 / 06:57:34 UTC
  • LOCATION:  Observatory Campground, Palomar Mountain,San Diego County, California
  • TEMPERATURE:  Unknown
  • HUMIDITY:  Unknown

This was the first color RGB image I had attempted.  I was at Palomar Mountain, attending the Explore the Stars program.  I did no fine polar alignment of the telescope mount (just ballparked it off the north star),and I fought the poor telescope drive gears!!!

I didn't collect any Flat-Field frames, Dark frames, or Bias frame for end processing of the object images at the time.  I've learned a lot and come a long way since then! 

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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..