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I agreeImaging telescope or lens:CELESTRON EdgeHD 800
Imaging camera:ZWO ASI1600MM-Cool
Mount:Orion Atlas Pro AZ/EQ-G
Guiding telescope or lens:CELESTRON EdgeHD 800
Guiding camera:ASI120MM
Focal reducer:Celestron 0.7x Focal Reducer
Software:Main Sequence Software Sequence Generator Pro, Pleiades Astrophoto PixInsight , Adobe Photoshop, PHD 2
Accessories:Moonlite CHL 2.5" Large Format Crayford Edge Focuser, Orion Thin Off-Axis Guider (TOAG)
Resolution: 1200x961
Dates:June 29, 2016, June 30, 2016, July 2, 2016, July 3, 2016, July 4, 2016, July 1, 2018
Frames:
ZWO Blue 1.25": 25x180" -20C bin 1x1
ZWO Green 1.25": 25x180" -20C bin 1x1
Astronomik H-alpha 6nm CCD 1.25": 81x240" (gain: 139.00) -20C bin 1x1
ZWO Luminance 1.25": 130x180" -20C bin 1x1
ZWO Red 1.25": 25x180" -20C bin 1x1
Integration: 15.7 hours
Darks: ~50
Flats: ~50
Bias: ~256
Avg. Moon age: 20.46 days
Avg. Moon phase: 24.63%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 2149310
RA center: 283.396 degrees
DEC center: 33.029 degrees
Pixel scale: 0.757 arcsec/pixel
Orientation: 272.632 degrees
Field radius: 0.162 degrees
Data source: Backyard
Most estimates agree that the Ring Nebula has been expanding for less than 2000 years. At its current rate, it expands at about one arc-second per century. The ring is a bipolar planetary nebula which is viewed about 30 degrees off-axis from Earth. This is gives us a slightly oblique view and an oval appearance. These emission nebula shells and central white dwarf are all that remain of a once-massive red giant star. This is probably the closest example of the ultimate fate of our sun.
This is a rework of a previous image. In fact, I took the processed LRGB final from two years ago and layered on the hydrogen alpha data captured this year to fill in the outer halo shells of the nebula. This is also my first image I can think of where I did final adjustments on a different screen, so we’ll see if I need to revisit it once I see it on my normal monitor.
Enjoy!
Color balance adjustment
| Cloudy Nights |
| Schmidt-Cassegrain Telescope (SCT) Imagers |
| ZWO ASI1600MM/QHY163M |
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