Sh2-129 Flying Bat and Squid Nebula
The Sh2-129 Fying Bat Nebula is a faint region of Ha gas. It's located 2300 light-years from Earth and spans an area of about 80 light-years. The very faint teal-colored "Squid" in the middle is OU4, discovered by Astro-imager Nicolas Outters in 2011. OU4 was originally thought to be a planetary nebula that resulted from an exploding star, but is now believed to be an outflow from the bright central stars of Sh2-129.

This is my 2nd attempt at catching the Squid. I upgraded the narrowband filters to 3nm which definately makes a difference. NoiseXterminator also enabled greater intensity stretching. But I still want to to capture at least 10 hours of narrowband data.

Scope/Mount: StellarVue SV70T Refractor with SFFR-70APO Focal-reducer/Field-flattener, Celestron CI-700 Mount
Camera: ZWO ASI1600MMC monochrome with ZWO LRGB filters and Antlia 3nm SHO filters
Guiding: QHY5L-IIM through Orion Thin OAG, PHD guiding software
Exposure: Ha:(12) 300 secs @ gain=300, Oiii: (24) 300 secs @ gain = 300, RGB: each channel (10) 120 sec @ gain=200
Software: Nebulosity, Pixinsight
Comment: 05-25-2025, Tierra del Sol, CA, good conditions, palette = HOO plus RGB for stars.