IC 4592 - Blue Horsehead Nebula
There is a 2021 version of IC 4592 HERE
What you are seeing is not the famous Horsehead nebula toward Orion but rather a fainter nebula that only takes on a familiar form with deeper imaging. The main part of this imaged molecular cloud complex is a reflection nebula catalogued as IC 4592.
Reflection nebulas are actually made up of very fine dust that normally appears dark but can look quite blue when reflecting the light of energetic nearby stars. In this case, the source of much of the reflected light is a star at the eye of the horse. That star is part of Nu Scorpii, one of the brighter star systems toward the constellation of the Scorpion (Scorpius).
Imaging telescopes or lenses: Takahashi FSQ130ED
Imaging cameras: FLI ML16200
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: Takahashi FS60CB
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: None
Software: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)
Filters: Astrodon L, R, G & B
Accessories: Robofocus Focuser, ATIK EFW3
Original Resolution: 4458 x 3495
Dates: 29th Apr - 22nd May '20
Frames:
Astrodon L 77 x 3'
Astrodon R 77 x 3'
Astrodon G 73 x 3'
Astrodon B 76 x 3'
Total Time: 15 Hours 9 Mins.
Center (RA, Dec): (243.197, -19.122)
Center (RA, hms): 16h 12m 47.243s
Center (Dec, dms): -19° 07' 18.284"
Size: 2.36 x 1.85 deg
Radius: 1.500 deg
Pixel scale: 1.91 arcsec/pixel
Orientation: Up is 181 degrees E of N
Reflection nebulas are actually made up of very fine dust that normally appears dark but can look quite blue when reflecting the light of energetic nearby stars. In this case, the source of much of the reflected light is a star at the eye of the horse. That star is part of Nu Scorpii, one of the brighter star systems toward the constellation of the Scorpion (Scorpius).
Imaging telescopes or lenses: Takahashi FSQ130ED
Imaging cameras: FLI ML16200
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: Takahashi FS60CB
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: None
Software: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)
Filters: Astrodon L, R, G & B
Accessories: Robofocus Focuser, ATIK EFW3
Original Resolution: 4458 x 3495
Dates: 29th Apr - 22nd May '20
Frames:
Astrodon L 77 x 3'
Astrodon R 77 x 3'
Astrodon G 73 x 3'
Astrodon B 76 x 3'
Total Time: 15 Hours 9 Mins.
Center (RA, Dec): (243.197, -19.122)
Center (RA, hms): 16h 12m 47.243s
Center (Dec, dms): -19° 07' 18.284"
Size: 2.36 x 1.85 deg
Radius: 1.500 deg
Pixel scale: 1.91 arcsec/pixel
Orientation: Up is 181 degrees E of N
Sky Map
Annotated Image
