The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project (astrovienna)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: 69 Ori · 69 f01 Ori · HD41593 · HD41602 · HD41997 · LBN 862 · LBN 863 · LBN 864 · LDN 1586 · LDN 1587 · Sh2-261 · The star f1 Ori

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The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

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The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

From October 2023 to January 2024, seven people in the Byron Bergert Imaging Group of the Northern Virginia Astronomy Club collaborated to collect narrowband data on this target. In the end, we gathered over 500 hours. Linda has prepared an excellent description of the data collection and processing steps, so I won't repeat that here, except to say that combining all that data from wildly different sources was . . . hard.

Here's a chart showing all the frames collected:

The really interesting thing here was the OIII triple bubble, which was a surprise to me. It shows clearly in OIII, and the brightest parts are also visible in Ha. Nothing in SII. It seems like a Wolf Rayet bubble, but I haven't found anything to suggest that the bright star inside the bubble is actually a WR star. Let us know if you have more information about it.

NOVAC

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Status	Advanced success
Started	...
Astrometry.net job	9230176
PixInsight job	QRRZ5PT3412EV4MB5ZNHP9GPK6WNDY9T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h09m26s.27
RA (top/left)	06h13m05s.92
RA (top/right)	06h05m43s.18
RA (bottom/right)	06h05m47s.51
RA (bottom/left)	06h13m06s.95

Dec (center)	+15°40′45″.9
Dec (top/left)	+16°23′01″.9
Dec (top/right)	+16°22′12″.6
Dec (bottom/right)	+14°58′08″.7
Dec (bottom/left)	+14°59′12″.2

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The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

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The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

The Triple Bubble in Lower's Nebula (Sh2-261) - 500+ Hour Joint Project

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