SH2-129 and OU4 aka Flying Bat & Squid Nebulae in HOO and RGB stars. This is my largest project to date with a total of 30 hrs of total integration time. It still needs more OIII, but my weather isn't cooperating. I may revisit this one at a later date, but here's what I've got!
Explanation: The Squid Nebula's alluring bipolar shape is distinguished here by the telltale blue-green emission from doubly ionized oxygen atoms. Though apparently completely surrounded by the reddish hydrogen emission region Sh2-129, the true distance and nature of the Squid Nebula have been difficult to determine. Still, a more recent investigation suggests Ou4 really does lie within Sh2-129 some 2,300 light-years away. Consistent with that scenario, Ou4 would represent a spectacular outflow driven by HR8119, a triple system of hot, massive stars seen near the center of the nebula. The truly giant Squid Nebula would physically be nearly 50 light-years across.
https://science.nasa.gov/ou4-giant-squid-flying-batEquipment: ASI2600MM-Pro
Antlia 36mm RGB, 3nm SHO filters
Orion 8" f/4 newt
SW Quattro CC
EQ6R-Pro
Image Details: Ha-122x300s, gain 100, -10c (10 hrs)
OIII-228x300s, gain 100, -10c (19 hrs)
R-20x60s, gain 100, -10c
G- 20x60s, gain 100, -10c
B- 20x60s, gain 100, -10c (1 hr)
Total integration: 30 hrsAcquired in NINA, Processed in Pixinsight and Photoshop
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