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I agreeImaging telescope or lens:APM Telescopes TMB - LZOS Apo refractor 152/1200
Imaging camera:QSI 6120wsg-8
Mount:10Micron GM2000HPS II
Guiding camera:Starlight Xpress Lodestar Autoguider X2
Filters:Astrodon Blue, Astrodon Green, Astrodon Red, Astrodon SII 5nm, Astrodon 5nm H-Alpha filter, Astrodon Lum, Astrodon OIII 3 nm
Resolution: 3976x2592
Frames:
Astrodon 5nm H-Alpha filter: 33x1800" bin 2x2
Astrodon Blue: 10x300" bin 1x1
Astrodon Green: 10x300" bin 1x1
Astrodon Lum: 11x600" bin 1x1
Astrodon OIII 3 nm: 35x1800" bin 2x2
Astrodon Red: 10x300" bin 1x1
Integration: 38.3 hours
Astrometry.net job: 3040898
RA center: 45.948 degrees
DEC center: 64.910 degrees
Pixel scale: 0.533 arcsec/pixel
Orientation: 0.755 degrees
Field radius: 0.351 degrees
Locations: e-Eye, Fregenal de la Sierra, Extramadura, Spain
Data source: Own remote observatory
Remote source: e-EyE Extremadura
HFG1 (PK 136+05) is a very old large, low-surface-brightness planetary nebula in Cassiopeia that was discovered by Heckathorn, Fesen, and Gull in 1982. It surrounds, and was produced by, a binary star system (V664 Cas) that is moving rapidly through our Galaxy. The star is moving towards the lower left of the image. As HFG1 plows through the interstellar medium, a bluish bowshock is produced; and a red trail of gas is left behind in its wake.
Ref: Monthly Notices of the Royal Astronomical Society 396(2):1186 - 1188 · June 2009
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