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Uploaded 9-Oct-10
Taken 8-Oct-10
Visitors 73

18 of 31 photos
Categories & Keywords

Subcategory:Night Sky
Subcategory Detail:
Keywords:Helix, NGC7923, Nebula
Photo Info

Dimensions3600 x 2400
Original file size7.12 MB
Image typeJPEG
Color spaceUncalibrated
Date taken9-Oct-10 00:45
Date modified10-Oct-10 00:47
Shooting Conditions

Camera makeCanon
Camera model40D Modified
ISO speedISO 1600
NGC7293 The Helix Nebula

NGC7293 The Helix Nebula

About this Object:
The Helix Nebula is an example of a planetary nebula, or 'planetary' formed at the end of a star's evolution. Gases from the star in the surrounding space appear, from our vantage point, as if we are looking down a helix structure. The remnant central stellar core, known as a planetary nebula nucleus or PNN, is destined to become a white dwarf star. The observed glow of the central star is so energetic that it causes the previously expelled gases to brightly fluoresce. The Helix Nebula in the constellation of Aquarius lies about 700 light-years away, spanning about 0.8 parsec or 2.5 light-years. Currently, the age is estimated to be 10,600+2,300−1,200 years, based solely upon a measured expansion rate of 31 km·s

About this Picture:
Location: From my driveway in Georgetown, Texas
Telescope: Orion ED80 @ F7.5
Mount: HEQ-5
Guiding: Orion StarShoot AutoGuider / Taurus Tracker III
Camera: Canon 40D Modified
Exposure: 67 x 120 sec @ ISO 1600 (2 hrs 14 min.)
Acquisition: ImagesPlus 3.75 Camera Control
Processing: ImagesPlus 3.75 – Darks,Flats,Bias
Post-processing: Adobe Photoshop CS3; Gradient Exterminator; Noise Ninja; Noel Carboni's Tools;
Date(s): October 5, 2010
Temperature(s): 60-50º F