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OU4 mosaic in SHO, 


            Frank Zoltowski
OU4 mosaic in SHO

OU4 mosaic in SHO

Technical card

Resolution: 2578x3732

Astrodon 3nm OIII: 30x1800" -25C bin 1x1
Astrodon 5 nm SII: 36x900" -25C bin 1x1
Astrodon Ha 5nm Ha 5nm: 36x900" -25C bin 1x1

Integration: 33.0 hours job: 389476

RA center: 317.982 degrees

DEC center: 59.938 degrees

Pixel scale: 1.098 arcsec/pixel

Orientation: -179.984 degrees

Field radius: 0.692 degrees

Locations: Tebbutt Observatory, Edgewood, New Mexico, United States


The planetary/mass ejection candidate OU4 discovered by Outters et al in 2012. OU4, the Giant Squid Nebula, is located within SH2-129 and based on observations by Romano Corradi, et al. is a possible ejection event from star HR 8119 launched about 90,000 years ago. The distance of these objects is about 700 parsecs.

It is a 2 pane mosaic taken with an AP155 EDF refractor and 0.75x telecompressor. The data was collected over 15 nights of imaging, spread out over two months. This is an object that definitely can use more frames, and I'll add it to my schedule for more data next season.

This is my first mosaic, processed entirely in PixInsight.



Frank Zoltowski
License: Attribution-NonCommercial-ShareAlike Creative Commons

Sky plot

Sky plot


OU4 mosaic in SHO, 


            Frank Zoltowski