Late Season Clamshell Nebula SH2-119 HOO Askar 400 (Brandon Tackett)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 68 A Cyg · HD201924 · HD201935 · HD202068 · HD202124 · HD202253 · HD202312 · HD202347 · HD202617 · HD202710 · HD202720 · HD202810 · HD202862 · HD203578 · HD204050 · HD204132 · LBN 383 · LBN 389 · LBN 390 · LBN 391 · LBN 393 · LBN 400 · LBN 401 · LBN 402 · LBN 404 · LDN 942 · LDN 943 · LDN 944 · LDN 946 · LDN 947 · And 10 more.

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Late Season Clamshell Nebula SH2-119 HOO Askar 400

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Late Season Clamshell Nebula SH2-119 HOO Askar 400

Since I had the data edited for the SHO version, I also completed at HOO version with adding 25% of the Ha to the green and blue channels to simulate an Hb effect.

H2-119 "The Clamshell Nebula" is a large emission nebula 2 degree east of the North America Nebula in Cygnus. The bright star Cygni 68 appears to be bright Peral with the large mouth in the swirling blue ocean water. An estimated 1,800 light years from earth, the formation measures approximately 2 x 3 degrees in our apparent field of few. With some basic trig, this yield that the formation is roughly 60 x 90 light years.

My favorite part of the images are the dark dust formation and spiculated formation. The accompanying bok globules located in the right portion of the nebula provide additional eye candy.

Final
Original
B

N.I.N.A. Users
Hydrogen and Oxygen Narrowband Only!
Central USA
Sharpless2 Objects

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Status	Advanced success
Started	...
Astrometry.net job	6787595
PixInsight job	3XYD0R2R9IWS7T3VMHUECCDNJ10A3V4N
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h18m28s.90
RA (top/left)	21h10m59s.99
RA (top/right)	21h11m06s.53
RA (bottom/right)	21h25m29s.55
RA (bottom/left)	21h26m15s.85

Dec (center)	+43°56′04″.6
Dec (top/left)	+45°42′59″.9
Dec (top/right)	+42°10′10″.5
Dec (bottom/right)	+42°07′28″.1
Dec (bottom/left)	+45°40′08″.0

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Late Season Clamshell Nebula SH2-119 HOO Askar 400

Late Season Clamshell Nebula SH2-119 HOO Askar 400

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Late Season Clamshell Nebula SH2-119 HOO Askar 400

Late Season Clamshell Nebula SH2-119 HOO Askar 400

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