Another northern favourite from SRO in California, the "Tadpoles" are 10 light-year long structures of gas and dust formed by the stellar wind from newly formed stars.
Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Focuser: Atlas
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel
Exposures: 20x1800s Ha, 18x1800s Oiii, 35x1800s Sii (36.5 hours)
Processing: PixInsight 1.8
Acquisition credit: John Kasianowicz, Daniele Malleo, Leonardo Orazi, Rob Pfile, Rick Stevenson and Jerry Yesavage.
Processing credit: Rick Stevenson
High res version on Astrobin:
http://www.astrobin.com/full/234489/B/?real=&mod=
This was a crash test dummy for the latest version of my ColorMask script for PixInsight:
http://pixinsight.com/forum/index.php?topic=9449.0
Cheers,
Rick.