HFG 1 & Abell 6
Image awarded APOD BRASIL on 07Jan25
HFG1 was discovered in the Milky Way Emission Line Study in 1982 by Heckathorn, Fesen and Gull. It is defined as a type F planetary nebula by Tweedy and Kitter, meaning that is appears to be uniformly filled.
HFG1 (lower left) was created by the central star V664 Cas. This is not a single star, but a dense binary star system consisting of a white dwarf and a sun-like star, which are only a few million kilometres apart and orbit every 14 hours.
Because the binary system V664 Cas moves very fast (at 29 to 59 kilometres per second) and ploughs through the interstellar medium together with the nebula, a bluish arc shock occurs.
Abell 6 is at image centre. This nebula also is emitting light in the OIII band while it's intensity in the range of hydrogen is low. Abell 6 appears to be circular with a diameter of almost 3 arc minutes. It's edge is partly brightened & terminates sharply. The central star is very faint and can just barely be seen.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm), Astrodon RGB.
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 16th Dec. - 25th Dec. 2024
Frames: (Total)
Astrodon Ha 90 x 600"
Astrodon OIII 90 x 600"
Astrodon RGB 3 x 60 x 60"
Total integration = 33 Hours.
Center (RA, Dec): (45.676, 64.457) (This data is for the full image below).
Center (RA, hms): 03h 02m 42.132s
Center (Dec, dms): +64° 27' 25.145"
Size: 1.8 x 2.2 deg
Radius: 1.420 deg
Pixel scale: 1.63 arcsec/pixel
Orientation: Up is 85.1 degrees E of N
HFG1 (lower left) was created by the central star V664 Cas. This is not a single star, but a dense binary star system consisting of a white dwarf and a sun-like star, which are only a few million kilometres apart and orbit every 14 hours.
Because the binary system V664 Cas moves very fast (at 29 to 59 kilometres per second) and ploughs through the interstellar medium together with the nebula, a bluish arc shock occurs.
Abell 6 is at image centre. This nebula also is emitting light in the OIII band while it's intensity in the range of hydrogen is low. Abell 6 appears to be circular with a diameter of almost 3 arc minutes. It's edge is partly brightened & terminates sharply. The central star is very faint and can just barely be seen.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), Astrodon OIII (3nm), Astrodon RGB.
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 16th Dec. - 25th Dec. 2024
Frames: (Total)
Astrodon Ha 90 x 600"
Astrodon OIII 90 x 600"
Astrodon RGB 3 x 60 x 60"
Total integration = 33 Hours.
Center (RA, Dec): (45.676, 64.457) (This data is for the full image below).
Center (RA, hms): 03h 02m 42.132s
Center (Dec, dms): +64° 27' 25.145"
Size: 1.8 x 2.2 deg
Radius: 1.420 deg
Pixel scale: 1.63 arcsec/pixel
Orientation: Up is 85.1 degrees E of N
Sky Map & Finding Chart
Ha, OIII & RGB in the Image. (Original at 90° from posted final image).
Annotated Image: (This is the full field taken with my set-up) Click on image to enlarge.
