Sh2-261; aka Lower's nebula (HOO inspired) (Dev (Dave) Prana)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: HD251704 · HD251732 · HD251766 · HD251767 · HD251855 · HD251899 · HD251900 · HD251924 · HD251925 · HD251978 · HD251979 · HD252004 · HD252087 · HD252088 · HD252089 · HD252090 · HD252135 · HD252245 · HD252246 · HD252332 · HD252333 · HD252359 · HD252360 · HD252387 · HD252437 · HD252540 · HD252594 · HD252623 · HD252650 · HD252678 · And 34 more.

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Sh2-261; aka Lower's nebula (HOO inspired)

Powered byPixInsight

Sh2-261; aka Lower's nebula (HOO inspired)

Sh2-261; aka Lower's nebula in HOO
Sh2-261 (Sharpless 261) also known as Lower’s Nebula has only been discovered in 1939. The Lowers (father and son) were amateur astronomers and found this nebula on one of their photgraphic plates taken in 1939. It is a relatively faint region in Orion constellation, emitting doubly ionized hydrogen, and the nebula has an apparent diameter of about 50 arcminutes. There is no accurate measurement as to the distance of this nebula, although best estimation is about 3.300 light years.

Approx 2 hrs (4 min and 5 min subs) using SW ED100 esprit Triplet Apo on HEQ5 Pro mount with ZWO 294MC Pro main camera, ZWO 120mm guidecam, ASI Air Plus, Optolong L enhance filter and powered by Jackery.
Approx 1.5 hrs (4 min and 5 min subs) using Z73 doublet apo on GEM28 mount with GPS, 0.8x FR FF, ZWO 183MC Pro main camera, ZWO 120mm guidecam, ASI Air Pro, Optolong L extreme filter, and all powered by Jackery.

Data stacked and integrated as separate sessions with their own flats, darks, and dark flats, in Astro Pixel Processor, resulting in one single image, post processed in Pixinsight and touched up in Paintshop pro for clarity, vibrancy, and Stars Spikes Pro plugin.

Final
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B

Title: Stars Spiked (slightly)

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	7432229
PixInsight job	2HHJADXONOX55S3LXXZPA4IVRTKX9LKX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h09m06s.11
RA (top/left)	06h11m33s.79
RA (top/right)	06h06m13s.16
RA (bottom/right)	06h06m39s.48
RA (bottom/left)	06h11m57s.77

Dec (center)	+15°47′11″.4
Dec (top/left)	+16°45′05″.8
Dec (top/right)	+16°40′53″.4
Dec (bottom/right)	+14°49′06″.9
Dec (bottom/left)	+14°53′16″.6

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Sh2-261; aka Lower's nebula (HOO inspired)

Sh2-261; aka Lower's nebula (HOO inspired)

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Sh2-261; aka Lower's nebula (HOO inspired)

Sh2-261; aka Lower's nebula (HOO inspired)

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