AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.
I agreeImaging telescope or lens:Skywatcher 200P 200mm/f5 NEQPro6
Imaging camera:ZWO 1600mm Cooled Pro
Mount:SkyWatcher NEQPRO6 Synscan GOTO
Software:AstroPixel Processor, Adobe Photoshop Lightroom CC
Filters:ZWO Green 36mm, ZWO Blue 36mm, ZWO Red 36mm
Resolution: 1833x1603
Dates:June 26, 2019
Frames:
ZWO Blue 36mm: 240x15" (gain: 200.00) -20C bin 1x1
ZWO Green 36mm: 240x15" (gain: 200.00) -20C bin 1x1
ZWO Red 36mm: 240x15" (gain: 200.00) -20C bin 1x1
Integration: 3.0 hours
Darks: ~50
Avg. Moon age: 23.14 days
Avg. Moon phase: 39.47%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 2786881
RA center: 270.616 degrees
DEC center: -22.960 degrees
Pixel scale: 1.138 arcsec/pixel
Orientation: 67.622 degrees
Field radius: 0.385 degrees
Locations: Lysterfield, Melbourne, Victoria, Australia
Data source: Backyard
A test to see how well collimated I am after removing the mirrors for cleaning then re-installing the mirrors in the Newtonian OTA. Not very well collimated it turns out. Or I have a tilt issue. So as pixel peepers can see I have a veritable donut factory happening on the left side of both images with the stars not forming nice pin-pricks but small donuts. The stars on the right side of the Trifid Nebula are a bit better. Always something to troubleshoot in this game.
This is 3 hours exposure on the Trifid Nebula using RGB filters with an ASI1600mm Pro. So 240 x 15 second subframes for each of the Red, Green and Blue filters (=720 sub-frames in total) from Lysterfield, Melbourne. The edges of the Trifid Nebula need more exposure time to bring them out better.
The Trifid Nebula (in Sagittarius) is an unusual object, being a combination of an open star cluster, an emission nebula (the pink part), a reflection nebula (the fainter blue part) plus a dark nebula which comprise interstellar dust grains that block light and produce the trifurcated pattern within the pink emission nebula (and hence the name Trifid nebula).
These colourful gas clouds (imaged in true colour here) are the spawning ground of stars and their planetary systems.
Comments