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:Astro-Tech AT8IN
Imaging camera:ZWO ASI1600MM-Cool
Mount:Skywatcher NEQ-6 Pro Synscan
Guiding telescope or lens:Astro-Tech AT8IN
Guiding camera:Meade DSI II C
Focal reducer:High Point Scientific Coma Corrector Photo & Visual For Netwonian Telescopes 2"
Software:DeepSkyStacker, EQASCOM, photoshop, Noel Carboni's Astro Tools for PhotoShop, Enterprise Astronomy Annie's Astro Actions, Sequence Generator Pro, PHD2 Guiding, Silicon Fields StarTools 1.3, AstroPlanner
Filters:ZWO H-alpha 7nm, ZWO Green 31 mm, ZWO Red 31 mm, ZWO Blue 31 mm
Accessories:Orion Thin Off Axis Guider (TOAG), Robert Brown's Arduino ASCOM Focuser Pro DIY, ZWO EFW filter wheel
Resolution: 2328x1800
Dates:July 3, 2018, July 4, 2018
Frames:
ZWO Blue 31 mm: 15x180" (gain: 139.00) -20C bin 1x1
ZWO Green 31 mm: 15x180" (gain: 139.00) -20C bin 1x1
ZWO H-alpha 7nm: 29x300" (gain: 139.00) -20C bin 1x1
ZWO Red 31 mm: 15x180" (gain: 139.00) -20C bin 1x1
Integration: 4.7 hours
Avg. Moon age: 19.97 days
Avg. Moon phase: 72.24%
Astrometry.net job: 2130278
RA center: 275.137 degrees
DEC center: -16.173 degrees
Pixel scale: 1.719 arcsec/pixel
Orientation: 269.461 degrees
Field radius: 0.703 degrees
Locations: Mapleton Lateral Observatory, Mapleton, Utah, United States
Data source: Backyard
I probably could have given more integration time to this, and would like to get SII and OIII for a Hubble palette version, but was very impressed with the Hα so decided to process with that. I got 20 subs of R, G, and B, but let Deep Sky Stacker pick the best 75% of each for stacking. I also reviewed the Starizona HαRRGB methods and attempted to follow them, with a result that looks much better to me than some of my other recent attempts where I tried to blend in more Hα (Now I probably need to go back and reprocess some of those with these methods—always something more to try!). I’ve been torn about which version I like better. Starizona method 1 gives an image with more stars (OK, it wasn’t “pure” method 1 because I screen layered the RGB stars back on top of the image) and less nebulosity. Ultimately I think I like it better. Method 2 shows off the nebulosity better, but the stars don’t look as good in my opinion and there’s a bit of an overall pink-reddish cast to it. So I’ll post both versions, but let the “method 1” version be the “final.” The guiding wasn’t great, so my stars are a little more “eggy” than usual.
Date: 3-4 Jul 2018
Subject: M17, Omega (Swan, Lobster) Nebula
Scope: AT8IN+High Point Scientific Coma Corrector
Filters: ZWO 31 mm diameter unmounted R, G, B, Hα
Mount: EQ-6 (EQMOD 2.000j)+PEC
Guiding: Orion Thin Off-axis Guider + DSI IIc +PHD 2.6.5 (Win 10 ASCOM)
Camera: ASI1600MM-Cool, -20 °C, Gain 139 Offset 21
Acquisition: Sequence Generator Pro 3.0.2.91
Exposure: 15x180 R, 15x180 G, 15x180 B, 29x300 Hα
Stacking: Deep Sky Stacker 4.1.1 (64-bit) dark+flat+bias, κ-σ stacking with κ = 1.5. Selectively stacked only the best 75% of RGB
Processing: StarTools 1.4.332: Combined R, G, and B in StarTools. Binned 2x2, cropped, developed, HDR, color, deconvolution. Stopped tracking to smooth. Binned Hα 2x2, cropped, vignette wiped, and developed followed by HDR (core reveal). Deconvolution followed by untrack smoothing. Combined Hα with RGB in Photoshop using either Starizona method 1 or Starizona method 2 (google it). Screen layered RGB stars (extracted from RGB using StarTools) on top of the method 1 image, followed by a few rounds of “decrease star size” and layer-masked “less crunchy more fuzzy.” AstroFrame.
Fast Newtonians |
Image the Universe |
Narrowband imaging |
ZWO ASI1600MM/QHY163M |
You have no new notifications. |
This page or operation is not available at the moment, because AstroBin is in READ ONLY mode. For more information, please check out our Twitter feed: https://twitter.com/AstroBin_com
If this image is the result of your processing of a public data pool, you can send it the pool so it's displayed there.
Use this form to select an existing public data pool.
If this image is the result of your processing of a private shared folder, you can send it the folder so it's displayed there.
Such limitation improves the website as a whole by discouraging people from creating fake accounts to like their own images. Thank you for understanding!
Currently, your AstroBin index is 0.00.
Comments