M 27 Dumbbell Nebula (Michael Timm)

Celestial hemisphere: Northern · Constellation: Vulpecula (Vul) · Contains: Dumbbell Nebula · M 27 · NGC 6853 · PGC 2815762 · PGC 2815767 · PGC 2815773 · PGC 2815775

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M 27 Dumbbell Nebula

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M 27 Dumbbell Nebula

So, again M 27. I wanted to see if the native focal length is better for this kind of object - compared to the CCDT67. Result: I needed to take longer subs, but the result is comparable to the one i did a few days ago. There is a second difference: I tried the Baader Neodymium Moon & Skyglow filter. It did not improve the image a lot, but i think it improves the subs a little bit - and every little bit that makes postprocessing easier is a good bit :-)

[Edit] By comparing the two images, first thing (obvious) is, that the nebula is bigger when imaging with the 1624mm focal length. This is totally clear. But the image also contains more details, which seems to be a bit odd, because the total integration time is nearly equal, and the nebula taken with the reducer has seen more photons per pixel (reducing by 0.7 means that the required integration time should also reduce by 0.7*0.7=0.49 for comparable results). Maybe this is the Neodymium? If so this will be my new standard filter for everything ;-)

"Nordish by nature"
ZWO ASI 294MC PRO
Cooled Color Cams
The OSC Club (One Shot Camera)
Ritchey Chretien telescopes GSO Family
Planetary Nebulae

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Status	Advanced success
Started	...
Astrometry.net job	3349549
PixInsight job	UO8H8FUZTFPAAT9RSUCRY3JV0CM2NMIX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	19h59m36s.314
RA (top/left)	19h58m19s.379
RA (top/right)	19h58m58s.497
RA (bottom/right)	20h00m52s.911
RA (bottom/left)	20h00m14s.442

Dec (center)	+22°43′15″.17
Dec (top/left)	+22°59′55″.26
Dec (top/right)	+22°20′32″.19
Dec (bottom/right)	+22°26′31″.65
Dec (bottom/left)	+23°05′56″.76

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M 27 Dumbbell Nebula

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