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I agreeImaging telescope or lens:Teleskop Service ONTC 10" f4 Newton
Imaging camera:Starlight Xpress Trius SX-814 mono
Mount:Astro-Physics Mach-1 GTO CP4
Guiding telescope or lens:Teleskop Service ONTC 10" f4 Newton
Guiding camera:Starlight Xpress Ultrastar Mono
Software:Main Sequence Software Seqence Generator Pro, StarNet++ Starnet ++, PHD2 Guiding PHD2 v2.6.5, PIXINSIGHT 1.8, Photoshop CC
Filters:Astrodon Tru-Balance Gen2 E-Series - B 36mm, Astrodon Tru-Balance Gen2 E-Series - G 36mm, Astrodon Tru-Balance Gen2 E-Series - R 36mm, Astrodon Narrowband 3nm SII, Astrodon Narrowband 3nm OIII, Astrodon Narrowband 3nm Ha
Accessories:QHYCCD OAG-M, Pegasus Astro Ultimate Power Box, QHYCCD QHYCFW3-M, Tele Vue Paracorr Type 2
Resolution: 2232x1610
Dates:Aug. 19, 2019, Aug. 20, 2019, Aug. 21, 2019, Aug. 22, 2019, Aug. 26, 2019, Aug. 27, 2019, Sept. 25, 2019
Frames:
Astrodon Tru-Balance Gen2 E-Series - B 36mm: 20x60" -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - G 36mm: 20x60" -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - R 36mm: 27x60" -20C bin 1x1
Astrodon Narrowband 3nm Ha: 30x900" -20C bin 1x1
Astrodon Narrowband 3nm OIII: 20x1200" -20C bin 1x1
Astrodon Narrowband 3nm OIII: 4x900" -20C bin 1x1
Astrodon Narrowband 3nm SII: 25x1200" -20C bin 1x1
Integration: 24.6 hours
Darks: ~50
Flats: ~20
Bias: ~100
Avg. Moon age: 22.25 days
Avg. Moon phase: 49.40%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 2950141
Locations: Home Observatory, Schenectady, New York, United States
Data source: Backyard
The Bubble Nebula (NGC 7635, Sh2-162, or Caldwell 11) was discovered by William Herschel in 1787. It is an H II region emission nebula in the constellation Cassiopeia. NGC 7635 is roughly 7 light years across and is located between 7,000 and 11,000 light years from Earth.
The "bubble" is created by the stellar wind from a massive, hot, Wolf-Rayet central star, SAO 20575 (BD+60°2522). The central star has a magnitude of 8.71 and a mass about 44 times that of the Sun. The nebula is near a giant molecular cloud, which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow as well.
The image was created from narrowband data (SII, Ha, and OIII emission lines) and presented in the Hubble palette. Star color was replaced with RGB data.
Source: Wikipedia
Versions:
Original - Field of view as imaged
C - Horizontal crop to highlight the Bubble Nebula and surrounding gas emissions
D - Starless rendition of the original field of view
E - Animation showing the elements to create the final image: individual narrowband channels, RGB image for star color and tone mapping intermediate steps
Starless version.
Tighter crop around the Bubble Nebula.
GIF animation of the making of this image.
Stretched stars a bit more to balance the composition.
| Sony ICX814 |
| Cloudy Nights |
| Fast Newtonians |
| Northeast Imagers |
| Narrowband imaging |
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