ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star (lowenthalm)

ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star

Acquisition type: Lucky imaging

ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star

Acquisition type: Lucky imaging

It was still about half an hour before reaching the end of astronomical, so I thought I would try a really bright target. Campbell's Hydrogen star was in a good spot and the seeing was quite good, so I gave it a shot. Here is the result.

Its so small and bright (its basically an 11.4 magnitude star), with such a saturated red color it that its difficult to capture and processes in RGB and see detail. In fact, its simply listed as star BD+30 3639 in the Bonner Durchmusterung (BD) which was created well before the objects true nature was discovered. I worked at it a bit using LRGB processing and desaturation of red to show detail around the central star, with the bluer OIII/Hb at the center and the bright red outer Ha ring. You really need to look at the inset 200% image in the full scale view to see the bluish inner nebula as the red overwhelms your eye otherwise. A really tricky object!

There is some fainter Ha emission beyond the bright outer red ring, but it's lost in the glare of the nebula and I don't thinkg it would really show up even if I waited until full darkness fell before imaging and captured a deeper image.

The core is so bright that I only needed to stack 3 two minute images. Each of the 3 images was composed of 240 x 0.5 second exposures live-stacked in SharpCap.

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Status	Basic failed
Started	...
Astrometry.net job	4794465
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star

ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star

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ARO11 (AKA BD+30 3639) Campbell's Hydrogen Star

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