Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton
Imaging cameras: Starlight Xpress Trius SX-814 mono
Mounts: Astro-Physics Mach-1 GTO CP4
Guiding telescopes or lenses: Teleskop Service ONTC 10" f4 Newton
Guiding cameras: Starlight Xpress Ultrastar Mono
Software: Starnet ++ · Photoshop CC · PIXINSIGHT 1.8 · Seqence Generator Pro · PHD2 Guiding PHD2 v2.6.5
Filters: Astrodon Narrowband 3nm SII · Astrodon Narrowband 3nm Ha · 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 OIII
Accessory: QHYCCD OAG-M · Pegasus Astro Ultimate Power Box · Tele Vue Paracorr Type 2 · QHYCCD QHYCFW3-M
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
Resolution: 2232x1610
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
Description: Starless version.
Description: Tighter crop around the Bubble Nebula.
Description: GIF animation of the making of this image.
Description: Stretched stars a bit more to balance the composition.
Description: Increased contrast slightly, revised stars.
Description: Matched levels of luminance layer to chrominance
| Sony ICX814 |
| Cloudy Nights |
| Narrowband imaging |
| Northeast Imagers |
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