NGC7048 (lowenthalm)

NGC7048

Acquisition type: Lucky imaging

I collected some image data on this target between other targets for the evening over several nights and got enough data for this 8 image stack of NGC7048. Seeing was decent to good, but with some wind buffeting the mount at time combined with numerous bright stars in the field, I got more star bloat than I would have liked. There is decent detail in the planetary though.
The blue central progenitor star in the nebula has a parallax in the Gaia DR2 database of 1.0228±0.2528 putting it between 784 and 1,299 parsecs. The angular diameter of the nebula is 74.4 x 67.3 arc seconds which translates to roughly 1.15 x 1.04 light years if the nebula's distance is the median value of 977.71 parsecs. Pretty typical for a bright planetary nebula. At 12.1 magnitude (visual), this planetary makes for a fine visual target for 8" and larger scopes.

The bright orange star to the upper right of the nebula is 8.25 magnitude BD+45 3458. Its Gaia DR2 calculated distance is about 1,840±100 parsecs and is listed in SIMBAD as a star of spectral class K5, but the B-V color index of 1.84 would make it more like an M5 star. Interstellar dust reddening of the star may be causing this, which professional astronomers adjust for! The absolute visual magnitude of -3.08 defintely puts this in the second giant branch, at least, of the H-R diagram, so this is an star well evolved off the main sequence and nearing the end of its life, probably destined to go out with a bang based on its likely mass. Stars are interesting beasts!

Each of the 8 images stacked for this image was a SharpCap live-stack of 320 x 1.5 second exposures.

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Description: Decided it needed a little more sharpening...

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Status	Advanced success
Started	...
Astrometry.net job	4774531
PixInsight job	EU1ZLMB89XCY8BVFW58SWDWIKSYO8HNH
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h14m14s.988
RA (top/left)	21h13m44s.683
RA (top/right)	21h13m36s.451
RA (bottom/right)	21h14m45s.157
RA (bottom/left)	21h14m53s.674

Dec (center)	+46°17′14″.98
Dec (top/left)	+46°25′49″.25
Dec (top/right)	+46°09′44″.17
Dec (bottom/right)	+46°08′39″.99
Dec (bottom/left)	+46°24′45″.13

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