Object: SH2-86/NGC6820/NGC6823 – 2019 (HST Palette)
An area of nebulosity surrounding the open star cluster NGC6823 in Vulpecula containing the reflection nebula NGC6820. The region is characterized by pillars of dense gas that lie on the edges of a cavity eroded by UV radiation from the cluster's hot, young stars.
- Magnitude: 9
- Constellation: Vulpecula
- Apparent dimensions (V): 40 arcmins
- Designations: SH-86/NGC6820/NGC6823
- Distance: 6,000 ly (1,800 pc)
This image was done using the HST or Hubble Space Telescope Palette which is accomplished by combining sub frames using three narrowband filters that capture light produced by glowing hydrogen (Ha), oxygen (OIII) and sulfur (SII) present in the nebula. Green is assigned to hydrogen, blue to oxygen and red to the sulfur.
Acquisition Date: 7/4/2019 – 08/30/2019
Location: Western Massachusetts
Camera: FLI ML16200
Telescope: Astro-TECH AT130 with APM Riccardi APO Flattener 1.0x
Mount: Astro-Physics AP1100
Guide scope: Off Axis Guiding (SX Maxi Filterwheel)
Guide Camera: Starlight Express Lodestar 2
Filters:
-Chroma 3 nm Hydrogen Alpha (Ha): 9 x 30min. (270min) bin 1x1
-Chroma 3nm Oxygen III (OIII):8 x 30min. (240min) bin 1x1
-Astrodon 5nm Sulfur II (SII):13 x 30min. (390min) bin 1x1
Total Exposure:900min. (15hr)
Limiting Magnitude: 5.1
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