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IC 434 / Horsehead Wide-Field

Classification: Dark Nebula / Emission Nebula / Reflection Nebula. B33 / IC432 / IC434 / NGC2023 & 2024. IC424, Teardrop neb, IC423
Constellation: Orion
Object Location: Ra 05h 37m 39s Dec -02° 15’50” (current)(centered)
Size & Distance: Apx.200 x 200 Apx 1500 light years

Date & Location: 12-04-2021 Little Blair Valley, CA
Exposure: HaLRGB; 120, 60, 60, 60, 60, Ha-8x15. LRGB-6x10 ea. (bin 1x1)
Optics: Telescope Engineering Company APO110FL w/ TEC FF @ f/5.74, 631mm using the Optec FocusLynx.
Mount: Astro-Physics Mach 1 GTOCP4 / ATS 8x36 Pier.
Camera: FLI-PL16803 @-25c / FLI CFW5-7 / Guided by SBIG ST-I / w OAG.
Filters: Astrodon 3nm Ha, G2 LRGB
Software: MaxImDL 6.11, Photoshop CC, CCDStack, Topaz Labs.

Notes: Sky conditions: Average seeing, No wind, Temp low 30’s
Image Field of view is 195 x 195 arcmin. Image Scale 2.94 arcsec/pix

B33 (Horsehead) is a Dark Nebula, NGC2024 (The Flame Nebula) and IC434 are Emission Nebulas, NGC2023 (low right of B33) is an Reflection Nebula in the constellation Orion. The nebulas are located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex as seen in this image. The nebula was first recorded in 1888 by Scottish astronomer Williamina Fleming taken at the Harvard College Observatory. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which bears some resemblance to a horse's head. NGC2024 is to the left of the Horsehead, IC431 and IC432 are to the left of the Flame Nebula.
Upper left also shows IC424 and the Teardrop Nebula IC423.