LBN 769 Supernova Remnant In HOO (Ani Shastry)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: HD278109 · HD278110 · HD278111 · HD278112 · HD278113 · HD278116 · HD278117 · HD278119 · HD278120 · HD278121 · HD278122 · HD278123 · HD278124 · HD278125 · HD278126 · HD278188 · HD278190 · HD35544 · LBN 769 · Sh2-224

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LBN 769 Supernova Remnant In HOO

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LBN 769 Supernova Remnant In HOO

Probably one of the most frustrating targets that I have ever imaged, LBN 769, or SH2-224, also called the Rice Hat Nebula, is a supernova remnant approximately 14,700 light years away from the Earth. This object is so faint that individual H-alpha or Oiii subs will barely, if at all, show anything particularly if there is even a little bit of moonlight. Which incidentally is exactly what happened on the first night of imaging where about 5 hours worth of subs had the nebula off-centered in the field of view and I didn’t catch that until the next day.

This target happened to be an excellent match in terms of being able to frame it within the field of view of the CDK14 reducer. I captured approximately ~20 hours of Ha and ~12.5 hours of Oiii for a HOO palette, as those emissions are the strongest with this object, and around 1.5 hours of RGB for colored stars. It took 11 nights to capture this much data with reasonable FWHM, with the average coming in around 2.1” and the lowest around 1.78”. On a slight tangent, I actually used this target to fine-tune the spacing on my reducer. While I think there is still room for improvement, this was the lowest FWHM that I have seen with my reducer on any target I have imaged so far.

34 hours of data at f/4.8 still doesn’t do this target justice, and I could have easily doubled the amount and still likely had insufficient SNR in my opinion. Processing this data was also extremely challenging as it was rather difficult to separate the details in the fainter parts of the nebula from the sky background. Overall I am reasonably happy with how it turned out, despite the frustrations along the way, and I will look at doubling the data next season and reprocessing it.

Hope you enjoy!

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Status	Advanced success
Started	...
Astrometry.net job	9452387
PixInsight job	4303VPTDR4WN8P07660HGNYAMQVGV2M9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h26m09s.860
RA (top/left)	05h24m01s.926
RA (top/right)	05h24m02s.768
RA (bottom/right)	05h28m13s.952
RA (bottom/left)	05h28m17s.932

Dec (center)	+42°57′35″.41
Dec (top/left)	+43°32′55″.77
Dec (top/right)	+42°22′16″.45
Dec (bottom/right)	+42°22′06″.57
Dec (bottom/left)	+43°32′45″.70

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LBN 769 Supernova Remnant In HOO

LBN 769 Supernova Remnant In HOO

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